uranium prospecting in the main karoo basin in ......uraanverkope en die huidige ooraanbod van uraan...

URANIUM PROSPECTING IN THE MAIN KAROO BASIN IN RETROSPECT

VOLUME I

HISTORICAL REVIEW, SUMMARY OF EXPLORATION STATISTICS AND RESOURCE ESTIMATES ON A COMPANY-BY-COMPANY BASIS AND

ECONOMIC VIABILITY OF THE MAIN KAROO BASIN

by

P J van der Merwe

ATOMIC ENERGY CORPORATION OF SOUTH AFRICA LTD PRIVATE JAG X256, PRETORIA, 0001

DECEMBER 1986

ISBN-0 86960-836-3

PER-147 PREFACE

Prospecting for sandstone-hosted uranium was carried out in the Main Karoo Basin for a period of 17 years. The safety of nuclear power generation fell into disrepute after the Three Mile Island incident in the USA, and resulted in the curtailment of nuclear power orojects. Utility selling of stockpiles created an oversupplled uranium market, and exploration for uranium lost momentum world-wide. Exploration endeavours in the Karoo did cot escape these depressed market conditions and were altogether stopped in early 1985.

As it is not foreseen that uranium prospecting will resume in the short term, a report entitled 'URANIUM PROSPECTING IN THE MAIN KAROO BASIN IN RETROSPECT', was compiled to serve as a reference guide for future investigations. Exploration statistics and resource estimates were collated and the report consists of 3 volumes as listed below.

Volume I PER-147

Historical review, summary of exploration r catistlcs and resource estimates on a company-by-company basis and economic viability of the Main Karoo Basin.

Volume II PIN-854 (B/R)

(a) Overview of exploration programmes - Main Karoo Basic orebodie8 A-C

(b) Overview of exploration programmes - Main Karoo basin orebodies D-F

(c) Overview of exploration programmes - Main Karoo Basin orebodies G-J

(d) Overview of exploration programmes - Main Karoo Basin orebodies K-L

PER-147

(e) Overview of exploration programmes - Main Karoo Basin orebodles M-P

(f) Overview of exploration programmes - Main Karoo Basin orebodies R

(g) Overview of exploration programmes - Main Karoo Basin orebodies S-W

Volume III PIN-855 (B/R)

A farm-by-farm reference guide to exploration company reports in the Geology Department's GEA filing system.

PER-147 - 1 C O N T E N T S

Page

SAMEVATTING/ABSTRACT

1. INTRODUCTION 1

2. SOUTHERN KAROO REGION 7 2.1 Historical Review and Exploration Statistics 7 2.2 Uranium Resources 16

2.2.1 Anglo American Prospecting Services (Pty) Ltd 21 2.2.2 Essex Minerals Co. 26 2.2.3 Esso Minerals Africa Inc. 26 2.2.4 Industrial Development Corporation of

South Africa Ltd 26 2.2.5 Johannesburg Consolidated Investment Co. Ltd 33 2.2.6 Karba Minerals Inc. (Union Carbide/Goldfields

Joint Venture) 33 2.2.7 Nevmont South Africa Ltd 36 2.2.8 Phelps Dodge of Africa Ltd 36 2.2.9 Rand Mines Ltd 36 2.2.10 Southern Sphere Uranium (Pty) Ltd 39 2.2.11 Union Carbide Exploration Corporation -

Southern Africa 50 2.3 Molybdenum Potential 56 2.4 Economic Viability 58

2.4.1 Data used for profitability analysis 58 2.4.1.1 Ore reserves 58 2.4.1.2 Life-of-mine 59 2.4.1.3 Ore sorting 59 2.4.1.4 Metallurgical recovery 59 2.4.1.5 Uranium and molybdenum prices 5? 2.4.1.6 Capital expenditure 59 2.4.1.7 Operating costs 60 2.4.1.8 Taxation 60 2.4.1.9 Discussion 60

PER-147 - 11 Page

SOUTHERN ORANGE FREE STATE 63 3.1 Historical Review and Exploration Statistics 63 3.2 Uranium Resources 63

3.2.1 Rio Tinto Exploration (Pty) Ltd 63

EASTERN ORANGE FREE STATE 64 4.1 Historical Review and Exploration Statistics 64 4.2 Uraniua Resources 68

4.2.1 Karba Minerals Inc. (Union Carblde/Goldfields Joint Venture) 68

QWA-QWA 68 5.1 Historical Review and Exploration Statistics 68 5.2 Uraniua Resources 71

5.2.1 Mining Corporation Ltd 71 CONCLUSIONS 74

BIBLIOGRAPHY 78

LIST OF REPORTS 79 8.1 Anglo Aaerican Prospecting Services (Pty) Ltd 89 8.2 Council for Mineral Technology 80 8.3 Esso Minerals Africa Inc. 82 8.4 Essex Minerals Company 84 8.5 Industrial Developoent Corporation of South Africa Ltd 85 8.6 Karba Minerals Inc. 85 8.7 Johannesburg Consolidated Investment Co. Ltd 86 8.8 Mining Corporation (Pty) Ltd 88 8.9 Nuclear Development Corporation of

South Africa (Pty) T.td 88 8.10 Newmont of South Africa Ltd 94 8.11 Phelps Dodge of Africa Ltd 95 8.12 Rand Mines Ltd 95 8.13 Rio Tlnto Exploration (Pty) Ltd 96

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8.14 Southern Sphere Uranlua (Pty) Ltd 98 8.15 Onion Carbide Exploration Corporation - Southern Africa 98

9. LIST OF MAIN KAROO BASIN MAPS IN THE GEOLOGY DEPARTMENT'S LIBRARY 101

LIST OF FIGURES LIST OF TABLES DISTRIBUTION LIST

iv vi 122

PER-147 - iv

FIGURE l

LIST OF FIGURES

Distribution of the Beaufort Group with the principal uranium areas indicated

Page 3

FIGURE 2 Stratigraphy of the Karoo Sequence,,with uranium deposits indicated

FIGURE 3 Annual uranium spot market price against the annual exploration expenditure in the Main Karoo Basin

FIGURE A Discovery sequence of the major uranium deposits in the Southern Karoo

8

FIGURE 5 Companies engaged in exploration on an annual basis

FIGURE 6 Annual exploration expenditure in the Southern Karoo region

11

FIGUKE 7 Breakdown of expenditure on a company-by-company basis - Southern Karoo

12

FIGURE 8 Metres drilled on a company-by-company basis -Southern Keioo

13

FIGURE 9 Frequency distribution of the recoverable uranium resources for the deposits discovered In the Southern Karoo

15

PER-147 - v

FIGURE 10 Pie diagram of the RAR -I- EAR uranium resources recoverable at less than $130/kg U discovered by each company In the Southern Karoo

Page 18

FIGURE 11 Cumulative frequency distribution of the average grade of the Southern Karoo uranium deposits

19

FIGURE 12 Cumulative frequency distribution of the uranium grade of Individual samples from the Southern Karoo

20

FIGURE 13 Uranium resources per grade category -Southern Karoo

22

FIGURE 14 Three-dimensional presentation of the number of deposits and their resources per grade range - Southern Karoo

23

FIGURE 15 Locality map of the uranium deposits and occurrences Xn the Southern Karoo

BACK PAGE OF REPORT

FIGURE 16 Locality map of the uranium deposits in the Southern Orange Free State

65

FIGURE 17 Locality map of the uranium deposits in the Eastern Orange Free State

69

FIGURE 18 Locality map of the uranluo anomalies and orebodies In Qwa-Qwa

72

PER-147 - vi Page

LIST OF TABLES

TABLE I Summary of the Individual companies' 14 discovery statistics - Southern Karoo

TABLE II Uranium resource estimates - Southern Karoo 17

TABLE III Uranium resource estimates and prospecting 24-25 statistics - Anglo American Prospecting Services (Pty) Ltd

TABLE IV Uranium resource estimates and prospecting 27 statistics - Essex Minerals Company

TABLE V Uranium resource estimates and prospecting 28-32 statistics - Es80 Minerals Africa

TABLE VI Uranium resource estimates and prospecting 34 statistics - Industrial Development Corporation of South Africa Ltd

TABLE VII Uranium resource estimates and prospecting 35 statistics - Johannesburg Consolidated Investment Co. Ltd

TABLE VIII Uranium resource estimates and prospecting 37 statistics - Newnont South Africa Ltd

TABLE IX Uranium resource estimates and prospecting 38 statistics - Phelps Dodge of Africa Ltd

TABLE X Uranium resource estimates and prospecting 40 statistics - Rand Mines Ltd

TABLE XI

PER-147 - vli Page

Uranium resource estimates and prospecting 41-49 statistics - Southern Sphere Uranium (Pty) Ltd

TABLE XII Uranium resource estimates and prospecting 51-55 statistics - Union Carbide Exploration Corporation Southern Africa

TABLE XIII Summary of the estimated molybdenum resources of the Southern Karoo

57

TABLE XIV Summary of the production schedule and economic considerations for the four major deposits east of Beaufort West

61

TABLE XV Uranium resource estimates and prospecting statistics - Rio Tinto Exploration (Pty) Ltd

66-67

TABLE XVI Uranium resource estimates and prospecting statistics - Karba Minerals Inc

70

TABLE XVII Uranium resource estimates and prospacting statistics - Mining Corporation Ltd

73

TABLE XVIII Uranium resource estimates - Main Karoo Basin 74

TABLE XIX Comparison of the discovery rate and cost per kilcgram of the different prospecting areas -Main Karoo Basic

75

PER-147 - vlll

SAMEVATTING

Prospekterlng na uraanhoudende sandsteenafsettings in die Karookon het gedurende 1969 'n a. nvang geneen en in 1985 tot 'n elnde gekom. Alhoevel opsles nog op sekere plase gehou word, word geen verdere ondersoeke In die nabye toekoms voorsien nie.

Uraanafsettlngs Is in die sedimente van die Onder-Beaufort-groep en die Elliott - en Molteno-formasie van die Stormberg-groep ontdek.

Redelik Versekerde en Geraaode Bykooende Hulpbronne herwinbaar teen 'n koste van minder as Í130/kg U beloop 31 211 t U.

Die Suidelike Karoostreek bevat die grootste deel van die hulpbronne, nl. 93 X. Die vier hoofertsliggame oos van Beaufort-Ves, naamlik Rystkuil en Rystkuil-verlengings, Haanekuil, Kareepoort en De Pannen hou 50 X van die Suidelike Karoo-reserwes. Hlerdie vier afsettings hou ook 60 X van die mollbdeenreserwes en vorm die mees lewensvatbare myndistrik in die Karookom.

Die ekonomlese lewensvatbaarheid van bogenoemde vier ertsliggame is ondersoek, en teen 'n uraanverkoopprys van R78,05/kg U en 'n Dolibdeenverkoopprys van R13,08/kg Mo in 1985-geldwaarde beloop die verdiskonteerde kontantvloei-opbrengs op belegglngskoers 16,3 X na belasting. Hlerdie af settings het 'n leeftyd van 20 jaar teen 'n jaarlikse produksle van 800 ton uraanmetaal en ongeveer 600 ton molibdeen. Die molibdeenproduksie is genoegsaam om in die land se huidige behoeftes te voorsien.

Gesien die feit dat 89 % van die inkooste verkry sal word uit uraanverkope en die huidige ooraanbod van uraan op die wéreldmark, is dit onwaarskynllk dat hierdie afsettlngs op kort tot medium termyn ontgln sal word, tensy 'n drlngende behoefte aan 'n blnnelandse bron van molibdeen ontstaan.

PER-147 - ix ABSTRACT

Prospecting for sandstone-hosted uranium deposits in the Main Karoo Basin started in 1969 and ceased during 1965 Although some farms are still under option, no further explcration in the short term is envisaged.

Uranium deposits were located in sediments of the Lower Beaufort Group, and Elliot and Molteno Formations of the Stormberg Group.

Reasonable Assured and Estimated Additional Resources recoverable at less than $130/kg U amount to 31 211 t U.

The Southern Karoo region has the largest share with 93 2 of the resources. The 4 major orebodies east of Beaufort West, i.e. Rystkuil and its extensions, Haanekuil, Kareepoort and De Pannen contain 50 X of the Southern Karoo's resources. These four deposits also contain 60 X of the molybdenum resources, and constitute the single most viable mining district in the Main Karoo Basin.

The economic viability of the four orebodies mentioned above was investigated and, at a uranium price of R78,05/kg U and a molybdenum price of R13,08/kg Mo in 1985 money terms, the DCFROR yield is 16,3 Z after tax. These deposits have a life of 20 years at an annual production rate of 800 t uranium and approximately 600 t molybdenum. The molybdenum production Is sufficient to supply the country's current needs.

Taking cognisance of the fact that 89 2 of the revenue is generated by uranium and the current oversupply of uranium on the world markets, it is unlikely that these deposits would be exploited In the short to medium term, unless an urgent need for a domestic molybdenum source arises.

PER-147 - 1

1. INTRODUCTION

Prospecting for sandstone-hosted uranium deposits was carried out in the Main Karoo Basin for a period of 17 years. Exploration programmes started out in the Beaufort West District in 1969, and uranium deposits and occurrences have subsequently been located in a broad belt stretching from Aberdeen through Beaufort West to Sutherland in an east-west direction, and from the Southern Karoo through the Southern Orange Free State to the Eastern Orange Free State and Qwa-Qwa.

General Geology: Uranium deposits in the Southern Karoo and Southern Orange Free State occur in rocks belonging to the Adelaide Subgroup. The sandstone is interbedded with mudstone and slltstone and the sedimentary sequence forms several megacycles of which the top three are economically the most important. Several lithofacies can be recognised and the sandstoue has all the characteristics of a fluvial depositional environment. Coffinite and uraninlte are the primary uranlferous minerals and are associated with carbonaceous debris and sulphides. Volcanic clasts and granitic detritus in interbedded mudstones presumably released uranium and the ore-forming fluids migrated along permeable channels in the sandstone.

Mineralisation generally occurs in the thicker parts of channel sandstones, especially in the lower part. Mineralised sandstones are dark grey to black and often calcareous, or less commonly bleached wnlte or yellowish-brown. Mineralised zones are discontinuous and seldom exceed a few kilometres in extent. Their tnicknesses vary from a few centimetres to a maximum of about 7 m. Within Individual channel sandstones, mineralisation may be preferentially associated with certain sedimentary structures, and carbonaceous debris is almost invariably present. Thus, local permeability differences and the availability of carbonaceous debris are two of the more Important controls on the location of mineralisation.

PER-147 - 2

Deposits were also discovered In the Nolteno Formation In the Eastern Orange Free State and the Elliot Formation lz. ijwa-Qwa.

Fig 1 shows the distribution of the Beaufort Group with the principal uranium areas indicated.

Fig 2 shows the stratigraphy of the Karoo Sequence, with uranium deposits indicated.

Exploration techniques: Various exploration techniques were used by the companies. Local carborne and airborne radiometric surveys were used to detect anomalous areas, followed by handheld spectrometry to deliueate drilling targets. During 1976 the Geological Survey embarked on a major airborne radiometric purvey, covering the entire Main Karoo Basin, in order to assist the companies. Other methods Include soil, stream sediment and borehole water sampling, radon emanom^try, induced polarisation and resistivity surveys. None of the latter methods proved to be very effective.

All companies prospecting for uranium have to submit reports to NUCOR in accordance with the Nuclear Energy Act, No. 92 of 1982 (previously the Atomic Energy Act of 1967, as amended). Numerous reports regarding the metallurgical aspects and economic feasibility of these deposits were written by MINTEK officials (previously the National Institute for Metallurgy).

The Three Mile Island incident during March 1979 in the USA sparked a lost of confidence in the safety of nuclear power generation, resulting in more strict regulatory measures, higher capital costs for nuclear power plants, the curtailment of nuclear power projects and utility selling of stockpiles. Contributing further to the slump in the uranium market was an economic recession in the First World countries during the early 1980s, causing a d"op in energy demand. A reduction in the oil price did not help the uranium

PER-147 - 3

PEB-147 - 4

vuuniai DEPOSIT*

ST0BMBE8S

CLAXaS rOEMATIOB

ST0BMBE8S

CMUP ELLIOT PORMATIOB or»-X»

MOLTEM POnUTIOI Jaaaa'a Joy (Plckabura;) Ed'a Ecstaay (Boaandal)

TAKKASTAP

SUBCBOUP

TEEKLOOF

PORKATIOH

STEEmUMPSBEKC H B 0 E B

TEEKLOOF

PORKATIOH

OUKLOOr KEMSES Paul's Sfphar

HOEDEMAKtt HEHBEI

POOtTJIE HEHBOt Ualtavoad, Kocktaoar, Sanítat, Biauvvcldfontaln, Exalfontaln, Kaffarafontain, Oakaarkolk,

•uuroR ADELAIDE Kraaifontaln, Drlafontain, ctogp SUBGROUP Lyahoak, Attarataland,

Bok • • Maaa, riathoak, fciurkop Croot Tafalbars, I m k f t l t m , Dawidakolk, D* Pannor., Tiartwk, Zaraepeort, Haanakull, Svartkop, Oa Coada Hoop, Bondoa, Ko*E«l-fontaln, lyat Cuil.

ABRAHAMSKMAL

ponuTioa HOORDEBAARS SAVDSTOn Taaboerafontain, Klipbankfkraal,

Daaalcakloof, Tmafontain, Paalhuit, Knoffalfontcln, • loasfjntaln, Brandavjmtfit, Daaafontaln, Lanslaatt*, Blatkiil l , Haterral. Kana l i rar , Buriarahoop.

BCU OROUP •prlnsbok PlaU

BOTE* CBOW

rl|ura J ftrallfraphy of tha Karoo laquanea, with uranlua dcpoalta Indicated

PER-147 - 5

industry either. All these factors contributed to the decrease in the uranium demand. Contract and spot market prices fell and resulted in exploration managers not being able to get approval for urealum exploration budgets. Prospecting programmes in the Main Karoo Basin ceased during 1985, and although some farms are still under option, no further exploration ic the short term is envisaged.

Fig. 3 compares the annual uranium spot market price and the annual exploration expenditure in the Main Karoo Basin.

The purpose of this report is to summarise the resource estimates and exploration statistics submitted to the AEC during the past 17 years. This report should be read in con junction with the Ph.D thesis of J P le Roux formerly employed by the AEC, entitled "Palaeochannels and uranium mineralisation in the Main Karoo Basin of South Africa" which also contains relevant references. In order to be conservative and prevent the over-estimation of the resources in the lower cost categories, resource estimates were cost categorised using an exchange rate of Rl • $1.

The economic viability of the 4 major orebodies oast of Beaufort West i.e. Rystkuil and Rystkuil Extensions (Kat Doom Kuil, Kant Kraal and Klip Stavels) henceforth called Rystkuil Project, Haanekuil, Kareapoort and De Pannen was investigated. This exercise was carried out using a uranium selling price of $30/lb U_0fi (R78,05/kg U) and a molybdenum price of Rl3,08/kg Mo and a rand/dollar exchange rate of Rl • $1.

A list of confidential reports, submitted by the prospecting companies, MINTEK and NUCOR officials, being held at the Geology Department, is also supplied.

PBR-147 - 6

50

4 5 -

Q 40J S? |D 3 5 -O

W25-I

20-1

15

o Q io

5-1

• SPOT MARKET PRICE - DOLLAR/POUND URANIUM OXIDE • EXPLORATION EXPENDITURE - MILLION RAND

iillili

'iffi&Wi#%?-.

'•:••.'-,' •:•••••: > /•'/•••'-, •:/:•;•>••• y y Z v ' .

mÊmmímsm wmmmmm

1975 1976 1977 1978 1979 1980 1981 1982 1983

30

25

20

15

- 10

-5

0 1984

Fig 3 Annual uranium spot market price "against the

annual exploration expenditure in the Main Karoo

Basin.

PER-147 - 7

2. SOUTHERN KAROO REGION

2.1 Historical Review and Exploration Statistics

The presence of uranium in the Main Karoo Basin was first noted in 1967, during radiometric logging of boreholes drilled by the Southern Oil Exploration Corporation (SOEKOR), In their search for onland oil and gas deposits. Of the 10 deep boreholes drilled, 6 Intersected anomalous uranium concentrations.

Union Carbide Exploration Corporation was the first exploration company which showed interest in the Karoo, based on the similarity between these sediments and those hosting uranium on the Colorado Plateau in the USA. During a carborne radiometric survey in 1970, uranium mineralisation was discovered on the farm Grootfontein in the Beaufort West District. Follow-up operations led to the delineation of the Rletkuil deposit and the submission of resource estimates to NUCOR in 1972.

In 1973 there was an announcement in Parliament that uranium had been discovered in the Southern Karoo. This announcement together with the predicted oil crisis, initiated large-scale exploration programmes. As the exploration tempo gathered momentum, the rate of discovery increased steadily from 1974 onwards.

Fig. 4 shows tbe discovery sequence of the major uranium deposits In the Southern Karoo.

During 1973 various exploration companies joined the 'uranium rush', vast areas were taken under option, and the number of companies searching for uranium escalated rapidly. Fig. 5 shows and identifies the number of companies engaged in exploration in a specific year.

PER-147 - 8

1972 1973 1074 1075 1976 1077 1078 1979 1980 1981

DISCOVERY SEQUENCE 1072 : Rietkui) 1073 : 1074 : Vindregersfontein 1075 : Damafontein Kaffcrsfontein 1078 : Ryatkuil 1077 : Tierhok Suurkop Eselfontein

Sandgat Quaggasfonlein 1078 : Bankagaten Bok Se Plaas Swartkop

Blaauwboogte hlipbankskraal 1070 : Kareepoort De Pannen Kondom Plathoek

Daasieskloof DR 3 GT - 7 Agtersteland Driefontein De Goedehoop Krasifontein Paula Sypher

1080 : Nieuwveldafontein Combrinckakraal 1061 : Haanekuil Daridskolk

Fig 4 Discovery sequence of the majf uranium deposits in the Southern Karoo.

PER-147 - 9

12

11

10

03 u 1 7 flat © o «

í I I

i r i i • t i o f ' l " I " I " I i r

• Union Carbid« • Rand Mine* • Southern Sphere • Easo • IDC • J C I • Newmont • Union Corporation • US Steel (ESSEX) • Phelps Dodge • Anglo American • Karba Minerals(Union Carbide / Goldfirld»)

Pig 5 Companies engaged in exploration on an annual basis.

PER-147 - 10

A total of R43 million was spend on exploration and development studies in the Southern Karoo. Fig. 6 shows the annual exploration expenditure in the Southern Karoo region and Fig. 7 shows a breakdown of expenditure on a company-by-company basis.

Exploration expenditure peaked in the 1978/79 period and the post-1980 period saw a dramatic decline in the number of companies involved in the uranium search*

A total of 1,6 million metres were drilled. Fig. 8 shows a breakdown of the metres drilled on a company-by-company basis. Taking only RAR + EAR resources recoverable at less than $130/kg U Into account, an average of 30,6 kg U,0. was discovered per metre drilled, and on average R0,89 was spent to discover a kilogram U.OQ. Table 1 summarises these statistics.

Uranium deposits in the Southern Karoo were discovered in A stratigraphlc members, i.e. the Moordenaars, Poortjie, Oukloof and Kroonplaatz Members. The Poortjie with 58 Z of the deposits was >

PER-147 - 11

lO-i

p

O

8

8-

4-

2-

0 -f 1 - i i r 1 r ~ 1 f i 1975 1976 1977 1978 1979 1980 1981 1982 1983 1904

Fig 6 Annual exploration expenditure in the Southern Karoo region.

PER-147 - 12

22

20

16

16

14

ï» z c

5

e

2ÓT5]

JOL 4531-

QJ]

I I I Mil

i « ^ * '

íl g§ P

^

COMPANIES

Fig 7 Breakdown of expenditure on a company-by-company

basis - Southern Karoo.

PER-147 - 13

COMPANIES

Fig 8 Metres drilled on a company-by-company basis - Southern Karoo.

PER-147 - 14

TABLE 1 Summary of the Individual companies' discovery statistics - Southern Karoo

Company Kg U30g/« drilled Cost (R)/Kg U 3 0 g

Esso Southern Sphere JCI AAC Union Carbide IDC Rand Mines

38,49 64,38 23,31 32,81 11,01 139,62 24,74

0,62 1,33 1,19 1,37 2,00 0,58 0,59

Weighted Average 30,60 0,89

To investigate the natural order of distribution of the deposits discovered in the Southern Karoo, a graph was constructed, utilising the geometric progression of tonnages (Boldy, 1977). The results plotted as a frequency distribution curve (Fig. 9) which is thought to be fairly representative of the total population.

Approximately 50 X of the total tonnage in the Southern Karoo comes from only four deposits. In addition it is worth noting that 63 X of all deposits have reserves of less than 400 t U, but cumulatively these deposits account for only 13 X of the total resources.

,TAM80EBSPOMTJ w ERSMOOP. KOEKOEHOCR METKUIl.PAALHUIS

^KNOFFELFONTEIN. KLEIN WATERVAL lUJENWWTElN. BRANOCWYNSGAT ,MANS RIVtR.STEENROtSWNTEIN. KUPBANKSKRAAl

^ r a ^ | r N X G E L R ) N T E . N . SANOGAT

-OfSSIESKlÓOf

KAFFERSFONTEM

DO MO »0*00500 1000 2000 3000 40» SOOO METRIC TONS U (RAR*EAR Recoverable at less than $ 130/kgU)

MOO TOM

PER-147 - 16

Figure 9 shows that a median deposit with reserves of 180 t recoverable U occurs with a frequency of 55 Z. A modal deposit with reserves ot 237 t recoverable U occurs with a frequency of 51 Z, and an arithmetic average deposit with reserves of 628 t recoverable U occurs with a frequency of 30 Z. Particular attention should be paid to the location of the upper decile position with a frequency of 13,5 Z, as this marks the base of really significant deposits with reserves In excess of 1 300 t recoverable U.

Assuming that the distribution represents the whole population, it seems unlikely that high tonnage deposits will be discovered in the Southern Karoo, as only 2 X of the discovered deposits are of real economic importance.

2.2 Uranium Resources

The Southern Karoo RAR + EAR uranium resources recoverable at less than $130/kg U are estimated at 28 996 t U. To account for mining and metallurgical losses a correction factor of 70 % was applied.

Table 11 is a summary of the Southern Karoo uranium resources in the different resource and cost categories. It should be noted that the resources are attributed to the company that originally discovered them and do not reflect the 1985 holding status.

Fig. 10 is a pie diagram of the RAR + EAR uranium resources in the less than $130/kg U cost category, discovered by each company in the Southern Karoo.

The uranium deposits in the Southern Karoo are lognormally distributed (Fig. .11) and the average in situ grade was calculated to be 1,28 kg lUOg/ t (0,76 kg recov. U/t) over a mining width of one metre. The uranium grade of individual samples does not follow the lognormal distribution as the cumulative frequency percent curve (Fig. 12) presents an inflection at 80 Z of the values.

TABLB II URAWIUM RESOURCE ESTIMATES - SOUTHER* KAROO

COMPANY

RAR EAR SR

COMPANY

PER-147 - 18

Fig 10 Pie diagram of the RAR + EAR uranium resources recoverable at less than $130/kg U discovered by each company in the Southern Karoo.

6.0 • 5.0 •

300

.00

100

e _ s UJ ^ <

50-*0-30.

20-1

< 0£ > < «8

10-

s

3

2 .

1 I V I ' ' ' I I I l i i i l l i i OS 1 2 3 * 5 10 i5 20 25 30 3 5 4 0 ( 5 5055 60 65 70 75 00 85 90

CUMULATIVE FREQUENCY PERCENT i i i — y r — • ^ ^ 95 96 97 90 99 995

•d w x i

o Figure 12: Cumulative frequency distribution of the uranium grade of individual

samples from the Southern Karoo

PER-147 - 21

This is because a lower than expected proportion of high-grade values is observed. If mining companies accepted the distribution of grades as lognormal, this could have led to over-estimation of high-grade blocks.

Fig. 13 shows that 37 Z of the total tonnage discovered falls in the 0,4 - 0,6 kg 0 recoverable/t range and 39,5 Z of the total tonnage falls in the 0,6 - 0,8 kg U recoversble/t range.

Fig. 14 is a three-dimensional presentation which compares the number of deposits per grade range and the cumulative tonnages of these deposits.

Tables III to XII give a breakdown of resource estimates and exploration statistics for each deposit on a company-by-company basis. This should be studied in conjunction with Fig. 15, which is a locality map stored at the back of this report (geology after Labuschagne and Cole, Le Roux, Kubler and Stear).

2.2.1 Anglo American Prospecting Services (Pty) Ltd

Anglo American Prospecting Services (Pty) Ltd (AAPS) started prospecting in the Beaufort West and Fraserburg district during 1975. Their relatively low key programme met with commensurate success and 1 448 t U in the RAR + EAR less than $130/kg U cost category were discovered. This tonnage comprises 5 Z of the total uranium discovered in the Southern Karoo sandstone deposits.

AAPS ceased prospecting In the Southern Karoo during 1983 and abandoned all optioned areas.

Table III is a summary of the resource estimates of the orebodies discovered by AAPS.

PER-147 - 22

12000 |H443.0t

11000

10000

9C00

8000

09 < 7000 > O u w K

g 5000 - f -o

4000

3OC0

2000

1000 I I I [212.0| [223.01 Í422.0J 1511.01 0.0 0.2 0.4 0 6 0.8 1 0 1.2 1.4

RECOVERY GRADE KG U/T 1.6 18 2.0 2.2

Fig 13 Uranium resources per grade category.

PEV147 - 23

*0 l V 8 * ^

*t>,

0 .

^ ; ;

8 O 0 Q

• « 3 0 0 ^

; ^ o 0 &

f>o 0 8 Qo

5# ÍF

%

•**> «V :v

Fig 14 Three-dimensional presentation of the number of deposits and their resources per grade range - Southern Karoo.

FER-147 - 24 TABU H I

RESOURCE BSTIHATBS AID STATISTICS

COHPAEY RARE: ABGLO AMERTCAB FROSPBCT1BC SERVICES (PTT) LTD.

nOSPBCT. PABa

•An/iuntn

LOCALITY

SOUTHBBB

KAKOO

S. KABOO

SUAJRKOr

/BLAAUW-

HOOCTB

A 3/A 4

KLIPBARKS-

KBAAL

B 4

KLIPEATO-

KRAAL

B 4

*WMBBIBCn-

KRAAL

A 13

DRILLIHC:

Pros- (•> P r o s . Co*t

PER-147 - 25

TABLE I I I

BSSOUBCB ESTIMATES AID STATISTICS

COMPACT HUB: AICLO AKBBICA» PBOSPBCTISC SEBViCES (PTT1 LTD.

PBOSPBCT. rABM SABD- SAID- BZBL- BOB SB BOB SB

•AME/IUKBEB CAT GAT POBTEIBI PLAAS PLAAS

LOCALITY B * B * A t B » B »

DBILLIBC:

P r o s . ( • )

Prof . Coat f t )

BZCAV:

Prog ( M •> Pro». Coat ( • )

AIBB. CtOPH. SUIV:

P r o s , l a

Pros- Coat (B)

OTHEK EXPL. COST:

P r o s . (B)

TOTAL EXPL. COST:

Pro». (B)

OBB TTPE SASDSTOVE

STBAT. HOB. L- BBAUPOBT

AV. THicntss (a) 1 .31 1 .2 l . i a 1 .0» 1 .2 DEPTH BAKE ( • ) 2 -45 0 - 1 0 19-29 28-112 2*-33 SPEC CRAVITY 2 . * * 2 , * * 2.«» 2 . * * *,»»

1« ABBA OP OBBBODY (»q • ) i t s « i t 124 0*0 70 72$ 137 442 78 853 • CUT-OPT CBADB k» OjO^/t 0 , 2 0 . 1 0 . 5 0 . 1 0 . 5 B TOES OBB in a i t u M l 400 39* 000 222 000 398 500 251 700

AV. CBADE 4 0 J l U u «* V s ° t n 0 ,39813 0,5479a 1,121*4 0 . 2 5 1 7 8 3,41905 TOMS UjO g i n a i t u 275 217 249 100 • * 1

OVEBALL BBC. PACTOB (1) 70 70 70 70 70

TOH UJOJ BBCOVBRABU 193 152 174 70 »02

U BBCOVEBABLB CtADB k | U/ t 0 , 2 4 0 . 3 3 0.*7 0 . 1 5 | 2 , 03 j

0 . 1 5 | 2 , 03

EST. COST/TOB MILLED (B) » 7 , 3 7 »7 ,37 (7.37 » 7 , 3 7 »7,37

T B SSO/kf 0 14«

0 A fSO-130/kS 0 129

B B

B $130-2*0/«« 0 1*3

B l iO/k* U 1 511

U A $80-130/E* 0

> B

B $130-2*0/*» 0 to > B • ISO/a* U

C B fBO-130/ltg 0

$130-2*0/k« 0 1 L

PER-147 - 26

2.2.2 Essex Minerals Co.

Essex Minerals Co (Essex) started prospecting In the Southern Karoo during 1974. No resources were discovered In the RAR -I- EAR less than $130/kg U cost category and prospecting stopped during 1977.

Table IV Is a summary of the high cost resources discovered by Essex.

2.2.3 Esso Minerals Africa Inc.

Esso Minerals Africa Inc (Esso) commenced active exploration for uranium In the Southern Karoo In October 1974. The first land optioned In February 1975 was the Rystkull farm southeast of Beaufort West. The Rystkull and Rystkull Extension orebodles were subsequently discovered In this area.

Esso's exploration programme was highly successful and a total of 19 737 t 0 in the RAR + EAR less than $130/kg U cost category were discovered. This tonnage comprises 68 Z of the total uranium discovered in the Southern Karoo sandstone deposits.

Esso stopped prospecting in the Southern Karoo during 1981 and abandoned all optioned areas.

Table V is a summary of the resource estimates of the orebodles discovered by Esso.

2.2.4 Industrial Development Corporation of South Africa Ltd

The Industrial Development Corporation of South Africa Ltd (IDC) started prospecting In the Southern Karoo during 1974. However, their exploration endeavour met with virtually no success and only 128 t U in the RAR + EAR less than $130/kg U cost category were discovered. This tonnage comprises less than 1 X of the total

PER-147 - 27 TABU nr

MSOWCt ESTIMTtS AK> STATISTICS

tssn HmMÁis COMPACT

r, rum

LOCALITO

• run

Fro». fro». Cott CU

BEAT: Pro» fat •> Fro*. Cost ( I )

Pro». Cost (I)

OMD EXPL. COST: Pro», (t)

TOTAL D F l . COST:

Pro». (I) 1 394 01»

on TIPS SAWDSTOM K M T . MOt. LOW* BtAOT.

AT. m e m » (•> -DtPTH IAMB ( • ) -S P K . CSATITT -

0 ARSA OP OMBOW («a. • ) -1 COT-OPT CRAM fc» 0 , 0 , / t -i ton oat in situ 220 345

AT. CUM 1» »ttu k« OjO t/t 0,23 TOM o,o g teJiSa. SI orauu. asc. PACVM «> 70 TOM 0,0, UCOVntASU 3* 0 RSCOVKRABU «BAM kt V/t 0.14

Mr. COST/TM n u » «) M . l *

1 a tso/k» v 0 A ISO-HO/k* V ! a •

a 1130-2*0/1« V a •

a fso/k» v t

V A fSO-130/kf V 1 a a

8 I130-2»0/k| 0 30 a a S fOO/k» V e a wo-ijo/k» v ' Sl3O-2»0/k« 0

PER-147 - 28

TABLB « BESOUBCS ESTIMATES AID STATISTICS

SSSO W E B A L S AFBICA

1 SOUTHBBB

T • , . . - - - . . , - . , — — — .

PBOsPtcv, rum SOUTHBBB 1 BAHB/BWBEB KABOO BTSTXVIL

• EST

BISTKU1L

• BIT

DASSIESXLOOr DASSICSKLOOP •MMVEU

POSTSIB

LOCALITY C 12 C 12 C 3 C 3 A 5

MIIXIK: Prog. (•) S44 4S7 Pro». Cost ( » 10 954 74i

•XCAV:

Pro» (to, • ) 14 523

Pro». Cost (B) SS4 70S

AIM . CBOPH. 8UBV:

Pros , ha »2 212

P r o s . Coat ( 1 ) 11» 150

OTHSB EXPL. COST:

Pros. (B) S 437 71S

TOTAL BXPL. COST:

Pro».

PER-K7 - 29

TABU V RESOURCE ESTIMATES ART) STATISTICS

COMPARY EAHE: ESSO MINERALS AFRICA

PROSPECT, FARM RAMB/HUKBEH LOCALITT

DRIIXIRC: Pro». (•' Pro». Coat (I)

EXCAV: Pros SPEC. CTUVITY AREA OP ÚREBODY (to, •) CUT-OFF CSADB k* OjOj/t TOWS ORE lit tttu AV. CRADE In tltu k( ",0,/t TORS 0jO $ In tltu 0"fKALL EEC. FACTOR !%) TORS U.O. UCOVfKABUt U RECOVERABLE CRADE k« U/t

EST. COST/TOR HILLED (I)

fSO/kg 0 tso-130/ks r 1130-240/kf 0

180/i, 0 ISO-130/kf V tl30-240/kl C

S f«0/kt U • ISO-130/ks 0

«130-240/k» U

SAJTDSTOHI LOWER BEAUF

1.0 40-200 2.66

«5 720 0.5

174 S14 1,35004

236 70 165 0.*

67,37

DASSIBS-KLOOF C 3

DASSIES-KLOOF C 3

DASSIES-KLOOF C 3

140

1,0 40-200 2.66

27 726 0.2

73 750 0.32

24 70 17

0,1»

67,37

RORDOM B 6

PLATHOEE B 4

14

1.0 40-300 2,66

1 47f 497 0.5

3 933 333 1.2

4 720 70

3 304 0,71

67,37

1.0 40-300 2.66

554 511 0,2

1 475 000 0,32 472 70

330 0,19

47,37

2 tOO

1,24 35-150 2.66

614 49S 0,5

2 027 520 1.07 2 169

70 1 519

0,63474

67,37

1 217

1.1 30-200 2.66

24S 173 0.3

724 153 1.3 944 70 441 0,77

47,37

340

280

PER-147 - 30

TABU V RESOURCE ESTIMATES ADD STA1ISTICS

COHPAR NAME: ISSO MINERALS AFRICA

PBOSPICT, PABB SUTHERLAND SUTHERLAND SVTHERLAVD — r

SUTHERLAND

NAME/NUMBER ADDITIONAL ADDITIONAL ADDITIONAL ADDITIONAL KOEKEHOEB LYSHOEX

OEE O U ORE OU

LOCALITY B I B * B t B « 1 B ( B (

DRILLING: i Prog. ( • )

Pro». Coat

Pro». Cost ( I )

A I M . GEOPH. SUFV:

Prog, lea ! Pros- Coct (R) !

1 OTHER EXPL. COST:

Prog, ( t )

TOTAL EXPL. COST:

Prog- (B)

OEI TYPE SANDSTONE

Prog- (B)

OEI TYPE SANDSTONE

STEAL HOB. LOWER BEAUP.

AV. THICKNESS

PER-147 - 31

TABLE T

USOUtCt ESTIMATES AID STATISTICS

COMMIT «AM tSSO HITP.ALS ATBICA

PtOSPSCT, FASH OB N l t n Dt PABSD KAEUPOOBT KARBEPOOBT HAAOTKUIL KAAIUUIL

•AMI

LOCALITY B 14 B 1* • 14 B 14 C 13 C 13

O U I U K :

rrot. (•> Pro». Cost ( ! )

EXCAV:

Pro» (»25 547 * S03 BS7 «40 BOO 2 2*7 9*2 427 200

AV. GMDI In s i t u kg OjOj/ t 0 , 9 9 9 * 0 .5*922 1 . 0 0 ,40*7 1 . 0 0 .41

TOSS OJOJ In « i t t i 2 21S 413 * «04 2*1 2 2*B 175

OVERALL ISC. PACTOk

PER-147 - 32

TAILS V RESOURCE ESTIMATES AID STATISTICS

COHPAIY UIB:

PROSPECT, PAH

1SSO B I I M U AFRICA

LOCALITY

DRILLUG: Pro». (•) Pros. Cost CD

EZCAV: Prog (so, •) Pro*. Cost (I)

AIRB. OIOPM. SUBV: Prog. *» Prog- Co«t (I)

OTHER DPL. COST: Prog. ittu kg V.O.'t T O M UjC g In tltu OVEBALL EEC. fACTOE (t) TOM UjO. BECOVBIABU U UCOVEBABLS CEADI kg U/t

TIERHOK

C 3

SAEDSTOVB

LOWEI BEAUT

1 . 1 * 15-200

2 .««

577 E15

0 . 3

1 7S2 905

1,4947»

2 »*5

70

1 »«•

0,19

TIEEHOK SUUEKOP

C 5 C 5

BAVKSCATn

B 5

EST. COST/TO! MILLED (B)

I ISO/kg V A ISO-lJO/k» U

I S l 3 0 - 2 t 0 / k g U

B ISO/kg V

A tSO-130/kg U

• | 130 -2«0 /kg V

« ISO/kg U

I MO-130/kg U

t l 3 0 - 2 t 0 / k g U

1.1 15-200

2.*«

124 OSt

0 .3

3t3 07»

1.3

472

70

330

0 .77

1.09

4-100

2 , t«

309 5»S

0 . 3

•97 «20

1,13199

1 01«

70

711

0.«7

1 .21 10-120

2 , * *

499 2BS

0 . 3

1 »07 009

1,21479

1 952

70

1 347

0 . 7 2

« « . I t

1 5*1

• « , 1 «

2B0

• 4 , 1 «

«03

1

• 4 , 1 «

1 15«

PER-147 - 33

uranium discovered In the Southern Karoo sandstone deposits.

The IOC stopped prospecting in the Southern Karoo during 1979 and all optioned areas were abandoned.

Table VI is a summary of the resource estimates of the orebodies discovered by the IDC.

2.2.5 Johannesburg Consolidated Investment Co Ltd

Johannesburg Consolidated Investment Co. Ltd. (JCI) commenced their exploration activities during 1974 in the Sutherland, Fraserburg, Loxton, Aberdeen, Richmond and Laingsburg districts.

Three orebodies were discovered with resources totalling 2 753 t U in the RAR + EAR less than $130/kg U cost category. This tonnage comprises 9 X of the total uranium discovered in the Southern Karoo sandstone deposits.

JCI stopped prospecting in the Southern Karoo during 1980 and abandoned all optioned areas, except for the farms on which the three orebodies are located.

Table VII is a summary of the resource estimates of the orebodies discovered by JCI.

2.2.6 Karba Minerals Inc. (Union Carbide/Goldfieids Joint Venture)

In 1977 Union Carbide Exploration Corporation and Goldflelds of South Africa Ltd formed a joiat venture called Karba Minerals. Karba Minerals prospected for uranium in the Aberdeen district in the Southern Karoo.

PER-147 - 34 TABU Tt

KtSOUlCt tSTHATtS ABO STATISTICS

COMPAHY BAB: IBPUSTBIAL PtrSLOPHBsT COBPOSATIOB

LOCAUTT

KOBGBL-POBTBXB D 4

DBISXIBC: PTOB- (•) Pro». Cost (I)

2 tor 5? 713

tZCAV: Pr*t

PER-147 - 35

TABU m USOURCt ESTIMATES AK> STATISTICS

COMPACT IAIB: JOHAWESBUBC COKSOLIDATTO t W l S T m W CO. LTP

PBOSPBCT. PABSI

LOCALITY

SOUTMOM DB-3

D 4

DAVIOSSOUC CT-7

B 7

MILLIIC:

Pro». ( • )

Pro» . Coat ( I )

199 10«

1 *M 7*4

EXCAT:

Pros ( « { • )

Prog. Coat (1 )

212 45 251

AIIB. CEOPH. SUIT: Pro», ka Prog. Coat (1) 415 797

OTKEK BXPL. COST:

P r o s . (*>

TOTAL t l P L . COST:

Pro». (1)

O U TYPE

STIAT. HOI.

AT. THICmSS ( • )

MPTH BABOB (a)

•P tC . CUTITT

o AMI OP otnoot (»4 • ) • CUT-OPT CtAOi k« 0 , 0 g / t

• TOSS O U In a l t u

AT. CBAM In « I t u k» U , O g / t

TOSS O j 0 ( to a l t u

3 S5S 52»

5 SOS 35S

SAIDSTOBE

Loun BUUPOBT

OTEIAIX SBC. PACTOI («)

TOSS OJOJ BSCOVnABLB

U nCOTttABLS CIADB k« 0 / t

EST. COST/TOB HILLED

PER-147 - 36

The uranium search in the Aberdeen district was unsuccessful and Karba Minerals stopped their exploration activities at the end of 1982.

2.2.7 Newmont South Africa Ltd

Newmont South Africa Ltd (Newmont) started prospecting in the Southern Karoo region during 1974.

This company failed to prove an orebody, and stopped prospecting during 1981. Exploration statistics are summarised in Table VIII.

2.2.8 Phelps Dodge of Africa Ltd

Phelps Dodge of Africa Ltd (Phelps Dodge) prospected in the Southern Karoo during the period 1974 to 1976. No resources were discovered in the RAR + EAR less than $130/kg U cost category.

Table IX is a summary of the high cost resources discovered by Phelps Dodge.

2.2.9 Rand Mines Ltd

Rand Mines Ltd (Rand Mines) commenced their exploration activities during 1974 in various parts of the Southern Karoo.

Their exploration endeavour net with limited success and 156 t U in the RAR + EAR less than $130/kg U was proved. This tonnage comprises

PER-147 - 37

TABU n i l •BSOJKCI ESTIMATES ABO STATISTICS

•BMHOBT SOUTH APBICA LTD.

PBOSPBCT. PABM

Mm/BUNMt LOCALITT

SOUTHEU

DSILUBG: Fro*, (a) Pro». Coat (I)

4 17? 41 057

BXCAT: Pros (so, a) Prog. Cost OBE TYPE STSAT. HOE.

AT. THICOESS (a) DEPTH BAfOI (a) •PEC. eiAVITY

O ABBA OP OtEBOOT

PER-147 - 38

TABLI IX

MSOUSCS ESTIMATES A D STATISTICS

COHFAIY U K : PHKLPS DOOCI or AFMCA LTD

Hosracr. PASS

LOCALITT

7 Fi

DBILLIJR: fro». (B) Pros. Cott (•)

BXCAV: Pro» (a* B ) Prog. Co*t (I)

All». GtOPH. SVKV'.

Pros- Cost (I)

OTHD. XXPL. COST: Pros- (1)

TOTAL SXPL. COST: Pro». (I) »73 »00

0 U TIPS

STMT. HOI.

SAIMTOSE

LCtm SBAOP.

A». TKICKSISS (B)

DEPTH IASCS ( • )

SPSC. OAflTT

0 ASIA OP OtnOt>I i tu

OVERALL SIC. FACTO» («)

UjOf ttcornAsu 0 BSCOVEBASLS OADS k» 0 / t

•ST. OOST/TDS KILLSD (S)

I ISO/k» 0

A M O - l M / k t 0

I 1130-2*0/*» V

S MO/k» 0

A MO-130/ t» V

B $130-1*0/1» 0

«13 »00

0 , 2 5

153

70

107

0 , 1 5

M , l »

S ISO/ft» 0

• MO-130/k» «

S130-2»0 /k | 0 • 1

PER-147 - 39

less than 1 X of the total uranium discovered in the Southern Karoo sandstone deposits.

Rand Mines stopped prospecting during 1980 and relinquished all their options.

Resource estimates for Rand Mines are summarised in Table X.

2.2.10 Southern Sphere Uranium (Pty) Ltd

Southern Sphere Uranium (Pty) Ltd (Southern Sphere) started exploration in the Beaufort West and Fraserburg districts during 1973 being the second company to enter the field. Several orebodies, totalling 3 041 t U in the RAR + EAR less than $130/kg U category, were discovered. This tonnage comprises 10,5 Z of the total uranium discovered in the Southern Karoo sandstone deposits.

Southern Sphere maintained their optioned areas throughout the low demand period and during 1982 optioned areas previously held by Esso in the Sutherland and Beaufort West districts. Prospecting was stopped at the beginning of 1985 and in addition to rights that had been purchased, some properties previously held by Esso were bought, and Southern Sphere currently controls 66 Z of the resources discovered In the Southern Karoo.

Table XI is a summary of the resource estimates of the orebodies discovered by Southern Sphere.

TABU I BSSOUBCS ESTIMATES ABD STATISTICS

PER-14? - 40

•ASP rows LTP

nosncT turn sovran sranjun *—n*f"Tr B OPS » KAS00 •ML m t B. BATAL

LOCALin • l i » l i - -

B B I L U K :

Pro». ( • ) 10 *32

P r o s . CMt H ) 11« SS4

nCAT:

Pros 205

Prog. CMt » ) 2 TOO i A i n . CEOPR. SUIT: ! j

Pr»». l a 9 321 !

Pros . Coat ( • ) 4* 319

OTHn HPL. COST:

Pro». (1 ) 4« *99

TOTAL EKPL. COST:

Pros. Ct) 1*7 001 *t 31t

on TYPE SASDSTOm STBAT. S t » . W W » SEAOP.

AT. nocmss (») 0 .35 0 , 3 7 0 , * 1 0.4A Mpm uses (•> 2 0 - ' 20-50 3 - 3 0 45 -93 S P K . CSATITT 2 , * * 2 . * * ».»• 2.44

0 ASIA OP 0UB00T (•«. • ) 2 721 OM 2 O i l 27* 579 4*3 141 M 9

• CVT-OPr CtADt k« 0 , 0 a / t

t ton on in «itu 2 $33 313 1 97« 300 940 542 20* 700 AT. « A M i n s i t u to " j O g ' 1 0,14*98 0 ,051 0 . 2 2 S 0 .237

TOO» n O g i n » l t u 3»0 101 214 4*

OVSBALL U C . FACTO! (« ) 70 70 70 70

TOSS UJOJ IEC0VEBA>lS 2t« 71 150 34

U BECOVEIABLE « A M kg «»/t 0 ,0« 0.O3 0 ,13325 o,i4o;«

EST. COST/KM RILL» ( • ) .- . . . «S.OO «S.OO 4 3 , 0 0 « 3 . 0 0

T • MO/kg 0 1

0 A fSO-130/kg V I 1 2 /

• t 1130-2*0/1« V 223 s

t MC/h* o "" "" I V A M 0 - » 0 / t o « ' 29

• •

• f l M - 2 « 0 / k S V i 1

• 0

• • S StO/kg 0 T

i c I tSO-130/ to V • 1130-2*0/1« V 1

PER-147 - 41

TABU I I

•SS0U9CB KSTIHATBS AID RATISTICS

COCS-AIX U K : SOUTH!» SPHUI U1ATUII (PTT) LTP

PtOSPBCT. PAH

LOCALITT

SOUTHKU

EJUtOO

KAPTnS

POBTIM

C 10

XAFFEBS

POBTBH

C 10

KAFFBIS

FOIITIII

C 10

HAAHEKUIL

C 13

M I I X I K :

Proa.. ( • )

P r o s . Coat ( 1 )

79 92*

919 359

ncA*. Pro» (aq a )

Pro», coa t ( • )

A I » . CtOPH. SUIV:

f r o g , l a

Pros . Coat ( I )

O m n UPL. COST:

Pro». ( I )

ncA*. Pro» (aq a )

Pro», coa t ( • )

A I » . CtOPH. SUIV:

f r o g , l a

Pros . Coat ( I )

O m n UPL. COST:

Pro». ( I ) 2 933 (94

3 152 255

SAIDSTOn

LOWU BEAUT.

1.0

15-100

2 ,4*

497 394

0 .5

1 929 000

1.0

1 929

70

1 290

0 ,59

TOTAL « P L . COST:

Pro». ( I )

OBI TTP!

STMT. KOI.

2 933 (94

3 152 255

SAIDSTOn

LOWU BEAUT.

1 .12

55

2 . 4 4

47 140

0 , 1 7

140 439

0 , 4 1

9*

70

40

0 , 3 *

1.0

15-100

2 ,4*

497 394

0 .5

1 929 000

1.0

1 929

70

1 290

0 ,59

0

•

IV. THICmSS ( • )

DtTTH EAKI ( a )

IPIC. CUVITT

U U OP OUBODT (aq a)

CVT-OPP C U M k» 0 , 0 , / t

1 0 « OU in a i t u

tV. C U M In a i t u k» 0 0 ( / t

TOBS UjO § in a i t u

OVERALL UK. FACTO! ( I )

roas u}o UCOVBRABLI U MCOVIRABLB C U M k( 0 / t

1.5

C-55

2 . * *

52 943

0 . 4 9

211 322

1 .04

220

70

154

0 . 4 2

1.12

0-35

2 . 4 *

19 174

0 .35

57 124

0 ,41

35

70

1 24

0.34

1 .12

55

2 . 4 4

47 140

0 , 1 7

140 439

0 , 4 1

9*

70

40

0 , 3 *

1.0

15-100

2 ,4*

497 394

0 .5

1 929 000

1.0

1 929

70

1 290

0 ,59

1ST. COST/TO! KILLED ( I ) 52 ,77 52,77 52 ,77

1

52.77

T

0

9

S

0

I

• c

• 190/k» 0

A tSO-130/kf U

1 1130-240/k» 0

131

52,77 52 ,77

1

52.77

T

0

9

S

0

I

• c

• ISO/k» 0

A »10-110/k» V

I f l 30 -240 /k« 0

• 190/k» 0

• ftO-130/kg 0

«130-240/k( U

21

I

1 J

51

1 095

PER-147 - 42 TABU XI

BESOURCB KSTIHATIS AID STATISTICS

COKPABX IAMB: SOUTHE1JÍ SPHEBB U1AMI1W (PTt) LTO

PBOSPBCT. PASS OB CBAR BAMS/BVNBSB

LOCALITY

VIVDRAGBItS-

romii DB BAD C 7

VIVDBACBBS-rOMTBIB DI BAD C 7

VIBDBACBBS-POBTEIB 01 BAD C 7

VIVDBACEBS-r o m u DB BAD C 7

1 VIBDBACKBS- VIHDRACEBS-POBTBIB rOBTBIB DB BAD OK BAD C 7 C 7

DEILLIB»: PBOC. (•) PBOC. COSTS (B)

BXCAV: PBOC. (a 3) PBOC. COSTS (B)

AIBB. 6B0PH. SUBV: PBOC. la PBOC. COST (B)

OTMBB EXPL. COST: PBOC. (B)

TOTAL EXPt. COST: PROC. (B)

OBB TYPB STBAT. HOB.

SABDSTOVS LOWBB BEAUT

AV. THICKXES8 ( • )

DBPTH RAKS ( • )

•PIC. 0RAV1TY

UTUUTBD ABBA OP OBBBODT ( a 3 )

CUT-OPT GBADB k« VjO g / t

TOBB OU In » l t u

AV. «BADC In » l t u kt 0 , 0 , / t

TOBB UjO, i n j i l a i

OVBftALL BBC. FACTO* (%)

TOBS UJOJ BBCOVEBABLB

U RECOVEBABLE OBADB

B8T. OOBT/TOB MILLED (B)

1 .33 0-75

2 , * *

1*4 7B0

0 , 4 »

582 9*0

0 . 5 « 344

70

241

0 . 3 5

1 .7» 0-75

2 , « *

100 750

0 .17

47» 709

0 . 3

144

70

101

0.1B

1.33

0-75

2 . * *

73 »95

0.4B

2*1 7B0

0,5«

154

70

101

0.35

• ISO/kt U A ISO-UO/k» U

• $130-2*0/ka U

»7,37

204

»7,37

B«

«7,37

1 .7«

0 -75

2 .*«

124 301

0 , 1 7

591 149

0 , 3

17B

70

124

0 , 1 8

1.33

75

2 . "

284 081

0.48

1 005 020

0 , 5 «

5*3

70

415

0 ,35

1.33

75

2,«*

302 844

0,17

1 071 401

0 ,3

321

70

225

0.18

»7,37 «7,37 »7,37

"~l

B ISO/fcf V

A tSO-130/kt 0

B " 3 O - 2 * 0 / k t 0

•2

10S

8 ttO/ks U

• 180-130/fct 0

$13O-2»0/kI U

352

191

PER-147 - 43

TABLE II RSSOURCB ESTIMATES AMD STATISTICS

COMPANY MAKE: SOUTHER» SPHEBI URAMIUH (PTY) LTD

PBOSPBCT, PARK OB CBAR DBIE- DBIE- DRIE- DBIB- ACTEBSTB- ACTEBSTE-HAKE/MUItBEB POMTRIV POREII /OMTEIH POMTI» LAMD LAMD LOCALITY A t A t A t A « A « A t

DBILLIK: PBOC. (a) PBOC. COSTS (B)

BXCAV: PBOC (a3) PBOC. COSTS (B)

AIRB. CBOPH. SUBV: PBOC. ka. PBOC. COSTS (B)

OTHBB BZPL. COST: PBOC. (B)

TOTAL BXPL. COST: PBOC. (B)

OBB TYPE SAMDSTOME

PBOC. (B)

OBB TYPE SAMDSTOME STBAT. HOB. LOWER BEAUP.

AV. THICKBBSS (a) O.S2 0,74 1.22 0,74 l.M 0,39 DEPTH RAMCE (a) 0-30 0-30 0-30 0-30 0-40 0-40 SPEC. CBAVITY 2.*» 2,«* 2.** 2.»» 2.** 2,*i

0 ESTIMATED ABU OP OBBBODY (a 3) 75 »4» 172 990 130 295 271 Oil SI 337 »9 797 B CUT-OPT GBADE k» U,Og/t o.«s 0,35 0.17 0,48 0.4d 0.4S B TOM OBE In »ltu H 5 000 3*0 SI* 422 S33 533 45S 378 «2» 109 540

AV. CRADE }n fltu ki U }O g/t l.li 0.35 0,24 0.48 1.13 2,*5 TOMS OjO, *n flfci 1*5 119 101 25» 435 290 OVERALL BBC. PACTOB (*> 70 70 70 70 70 70 TOMS UJOJ RECOVERABLE 13* S3 71 179 305 203 U aECOVERABLE CRADE 0,7 0,21 0.1* 0,28 0.48 1,57

EST. COST/TOB HILLED (B) »7,37 »7,37 »7,37 »7,37 »7,37 »7.37

| T B $80/k( U III 25S 0 A $80-130/ki D 71 1 s

B Sl30-2*0/kt U «0 1 s

E *Sw-"«» « 152 172 u A 180-130/kS U B f

R 1130-2*0/1» 0 B f S *SO/k* U C B ÍIO-130/k» U • $130-2*0/«« 0 1

FER-147 - 44

TABU U

KZSOUSCI ISTIHATRS AMD STATISTICS

COMPACT «AM: SOUTHBU SPH1M OBARH» (PTT) LTD

FROSPRCT, FARM OS CBABT DR CORDS PR 60BOR —— — DR C0B3R DS GORDB

- — • - • - . . » ™ . • • • , . • — .

DR COEDB KRAAX-

RAKR/VUMBBR HOOP HOOP HOOP HOOP HOOP PORTRIB

LOCALITY A 7 A 7 A 7 A 7 A 7 A 8

t U L L I K :

PSOC. ( • )

PBOG. COSTS (B)

RXCAV:

PBOG. COSTS (B)

RXCAV:

PSOC ( a 3 )

PSOC. COSTS ( I )

AIBB. CSOPH. SUBV:

PSOC. ta.

PSOC. COSTS (B)

OTHER KXPL. COST:

PBOC. (1)

TOTAL U P L . COST:

PBOC. ( ! )

ORS TYPS SAVDSTOVS

STRAT. HOB. LOWBR BRAUP.

AV. THicnrsss (•> 0 , 5 8 0 ,50 0,71 0 . 7 5 0 ,75 0,82 DRPTH RARCB ( • ) 0-2S 0 - i 0 0-80 0-25 0-25 4-59

SPSC. CRAVITY 2 , « 6 2 , * * 2.44 2 .*« 2 .«« 2,««

0 tSTIHATtO ARU OP ORIBODY ( a 3 ) 59 «32 m o«i 82 814 377 «37 77 347 33 737 1 CWT-OFP CRADt k» UjO,/ t o.»s o,*s 0,48 0 , 1 7 0 ,17 0,48 1 TORS ORS 1ft l i t u 92 000 227 484 15« 402 753 385 154 308 73 587

AV. CRASS In » H u kt UjOj/t 1 .1S 0 ,97 l . « 9 0 .2« 0 .2« 1,97

«HIS u 3 0, In »ltu 109 221 244 19« 40 138

OVBRALL I S C . PACTOI

PER-147 - 45 TABU XI

BISOUBCB ESTIMATES AID STATISTICS

COHPABY IAMB: SOUTHEB1 SPHBBI UBABIMI (PTT) LTD

PBOSPBCT, PAEH OB «AWT "r

KBAAI- KBAAJ- KBAAI- KBAAI- KSAAI-

•An/VUMBEB rOBTEIB FOBTEH POBTBIB POMTBM roRBIB WELCEMOED

LOCALITY A • A • A 8

DBILLIK:

PBOC. ( • )

PBOC. COSTS ( • )

BXCAV:

PBOC. ( a 3 )

PBOC. COSTS (B)

AIHfl. CBOPH. SUBV:

PBOC. ka

PBOC. COST (B)

OTHDt BXPL. COST:

PBOC.

PER-147 - 46

TABLB XI

KESOUBCB ISTIHATtS AID STATISTICS

COMPABY BARB: SOUTHKB» SPHKBB PIABIMI CPTY) LTP

nOSPBCI, FASH OB CEABT WELCENOED UBLCBWBD PAUL'S PAUL'S PAUL'S PAUL'S

lAMX/BUMMB STPHXB SYPMKB SYPHBB SXPHBB

LOCALITY A • A 8 A 7 A 7 A 7 A 7

DBILLIBS:

PBOC. (» )

PtOC. COSTS (B)

KXCAV:

PBOC ( a 3 )

PBOC- COSTS (B)

AIBB. CBOPH. SUBV:

PBOC. ka.

PBOC. COSTS (B)

OTHBX BXPL. COST:

PBOC. (B)

TOTAL BXPL. COST:

PBOC. ( I )

[ OBB TTPB SABDSTOBB

| STBAT. HOB. LOUBX BEAUP

A». THICOBSS (a) l , i 7 l . « 7 1,80 1.5» 1 .5

DSFTH BABCS ( a ) 0 -40 40 0-22 0-22 0 -23

1PBC. CBAVITY 2 . * * 2 ,8* 2,8« 2 .88 2 ,88

0 BSTOUTBD ASIA OP OKBBODT ( a 3 ) 13 OSS 28 178 25 ( 0 0 lO 152 11 830

B CUT-OPT CKADt kg 0 , 0 ( / t 0 . « 0,48 0,48 0 .35 0 ,17 0 .4»

B TOBS OBB JjLl i fa l 5S 140 118 27« 124 483 42 «38 47 200

A». C1ADI In » l t u k« O ^ / t 0 , 4 8 0,48 1,30 1.08 0 , 5

TOBS U , 0 , i n tlVi 2S 3« 182 45 24

OVXBALL BBC. PACTOB ( t ) 70 70 70 70 70

TOBS UjOj BSCOVBBABLt 20 39 113 32 18

0 BBCOVBBABLB CBADB 0 , 2 8 0,28 0,77 0 , 8 3 0 , 3 0 0.2S

•ST. COST/TOB MILLED (B) 8 7 , 3 7 «7 ,37 87,37

«8

« 7 , 3 7 8 7 , 3 7 87,37

t B f80 /kg V

8 7 , 3 7 «7 ,37 87,37

«8

« 7 , 3 7

'

0 A «80 -130 /k t U

B

• B 1130-260/«* 0 B

• B *80/k» V 17

i 27

U A t S 0 - 1 3 0 r t t 0

B t l 3 0 - 2 8 0 / k « 0 14

I

B g ISO/kg U

C a *so-no/*s a 33 70 • I130~280/k( 0

PER-147 - 47

TABLI XI RESOURCE ESTIMATES AID STATISTICS

COKPAHY BAKE: SOUTHER» SPWEM URABHJH (PTY) LTD

PROSPECT. PA» 01 CBABT PAUL'S KRAAI- 7SAAI- KEAAI- TAHBOEBS- TAKBOERS-BAME/BUMBEE 5YPHBB POBTEIB PORTBIB PORTEIB rOBTBIB POBTEIB LOCALITY

DKIIXIK: PBOC. (a) PROC. COSTS (1)

aXCAV: PBOC (a 1) PBOC. COSTS (B) 1

1 AIBB. CBOPH. SUBV:

PBOC. ka. PBOC. COSTS (B)

OTKEB BXPL. COST: PBOC. (B)

TOTAL BZPL. COST: PBOC.

PER-147 - 48

TABU XI

USOUBCI BSTIHATBS AID STATISTICS

COMPACT BANS: SCmtSBB SPHBBS UEAEIUM CPTT) LTP

PBOSPBCT, PABH OB CBABT TAKBOEBS- TAHBOEBS- TAKBOEBS- WILCEB-

•AME/BUHBEB POHTBIB POREIB rOBTBIB BOSCHKLOOP

LOCALITY B B B S B S A S

DBILLUC:

PBOC. ( • )

PBOC. COSTS ( I )

BXCAV:

PBOC ( a 3 )

PBOC. COSTS (1)

AIBB. CBOPH. SUBV:

PBOC. ka

PBOC. COST (B)

OTHKB BZPL. COST:

PBOC. (B)

TOTAL EXPL. COST:

PBOC. (B)

OBB TYPE SABDSTOBE

STBAT. HOB. LOWEB BEAUT

AV. THICHESS (a ) 2 , 1 2 1,27 1 .5* 2 , 4 « DBPTH BAKE (a) 0 -50 0-50 0-50 30

SPEC. CBAVITX 2 . * * 2 . * * 2 ,«* *.** O ESTIMATED ABBA OP OBEBODT ( a 3 ) 1 «S3 t 595 S 033 4 «37

i cvt-orr CBAM u » , o $ / t 0 . 3 5 0 .17 0 .4S 0 , 4 8 B TMS OBB in «ltu 11 23S 22 27S 21 2SS 31 391

AV. CBAM JO f tm H V ,0 , / t 0 . 4 2 0 .25 0 .52 0 . 7 S TMS UjO§ In «ltu 3 t 11 24 OVBBALL BSC. PACTOB (I) 70 70 70 70 TOMS 11 ,0 , EECOVBBASLS 3 * S 17 U BBCOVIRABLS CBADS 0 .2S 0 .15 0 .31 0 , 4 «

1 S T . COST/TO* RILLID (B) «7 ,37 «7 ,37 «7 .37 « 7 , 3 7

T B tso/k«, D 0 A SSO-130/ks 0

• B l l 3 0 - 2 * 0 / k » D • •

B ISO/kg U

V A ISO- 130/ks V B 1130-2*0/11» 0

3

3

1 B I $S0/k» U C B ISO-130/1« C 7 15

llJO-240/c» 0

PER-147 - 49 TULA XI

usouici trruura * » STATISTICS

coMPure u m : SOUTHS— s m u t wuumni ITP

PBOSPBCT, FABI

•ABB bOCAUTI

10 * PiBMS SOVTKKBB KABOO

MUU.IK: Pro». (•) Pro»- Co»t (!)

BXCAT:

Pros- (»') Prat- Co*t (•)

Al l» . CtOPH. SOW:

Pros- *» Pro». Cort (1)

OTHEK EXPL. COST: Pros. (1)

10TAL IZPL. COST:

Pros- (•)

OS! TIPS STBAT. mt.

AV. THICmSS (•) MPTH BABCS (a) SPSC. CUUTT

0 ABBA OP OttaODX («q • )

B cut-orr CUM k» «,o (/t B TOW OBB in altu

AT. CBAM in lit»» k» 0 , 0 , / t TO"» OjOj in i l t o OTBUU. ISC. nCTOI {*) TOW» 9 , 0 , BBCOVEBASLB U BSCOVBUtLB CBAM ks 0 / t

1 40» 75» 0,41

57S 70

405 0,24

1ST. COST/TOB BILLSD ' t )

T B SCO/Its V 0 A IBO-130/k» 0 • I fl3C-2*0/k» 0

B MO/k* 0 V A IBO-lM/ta 0

B •130-2*0/1« 9

M , l t 1ST. COST/TOB BILLSD ' t )



B •130-2*0/1« 9

32 32 41

1ST. COST/TOB BILLSD ' t )



B •130-2*0/1« 9

B • 1*0/1» 0 e a sso-130/kt o

•130-2*0/feB 0

4* 52

140

PER-147 - 50

2.2.11 Onion Carbide Exploration Corporation - Southern Africa

Union Carbide Exploration Corporation - Southern Africa (Union Carbide) discovered uraniua mineralisation In Lower Beaufort sediments during 1969, and subsequently carried out prospecting in the Beaufort West and Fraserburg districts. Several orebodies, totalling 1 733 t U in the RAR + EAR less than il30/kg U cost category, were discovered. This tonnage comprises 6 X of the total uranium discovered in the Southern Karoo sandstone deposits.

Union Carbide stopped prospecting in 1979 and bought the mineral rights of various farms where its prospecting programme was successful In locating mineralisation.

Table Xll is a summary of the resource estimates of the orebodies discovered by Union Carbide.

PER-147 - 51

TABU XII

USOUKCt tSTIHATIS AID STATISTICS

COMPAVT KAMI: WnOK CAIB1DK UPLOKATIO») COKPOIATIOK SOOTHS» AFRICA

I PtOSPKCT. PAH

LOCALITY

MILLIK: Pro». (•) Pro*. Coat (1)

KXCAV: Pro» (aq •) Pro». Coat (I)

SOUTHKSK

24* 032 1 «71 AM

47 237

009 •

• •

00« P(l)

a •

AIM. CSOPH. SUIT: Pro(. ka Pros- Coat (•)

OTHIS KXPL. COST: Prog. (I)

TOTAL KXPL. COST: Pro». (I)

OIK TYPS STKAT. HOt.

4» 09«

« 1 « ! 050

5 •*? «3«

AV. menus (•> DKPTH SAKS ( • )

SPIC. CBATITT

AKKA OP OUBODY (aq • )

CUT-OPT CHAM k» U , 0 ( / t

TOMS Oil in altu AT. CIAM in altu k» Oj0,/t TOSS UjOj In »ttu OVUALL ISC. PACTOI

FER-147 - 52 TABU XII

BSSOUtCS ESTIMATES «SO STATISTICS

PAR WHO» CABBIPB EXPLOBATIOS COtfOBATIOB SOUTHS» ATTICA

PBOSPSCT, (ASM 033 P t / 7 033 P10 EXT M4/03S B(S) 00«/01

OBB TTPt

STBAT. BOB.

A*. THicnrtss (a) 1.11 1.2» 1.07 1.1 1.54 O.M DEPTH BABCS ( a ) IS IS 72 10 12 4t

srac. MA*m 2 . « 2.*» 2 . t . 2 , t t 2 . t t 2 . t t 0 ABBA OP OBtBOOT (a* a ) 52 017 * 5*3 31 440 t 40B t SOI 27 404 B CVT-OfP « A M kg " j O g / t 0.5 0.5 0.3 0.5 0.5 0.3 B TOM OBB l a al t t i 133 5S5 32 SIS S» 4SS IB 751 27 S3» tS 322

AT. CBADB l a a i t u kg " j O j / t 1 . « l . t 2.3S 2. t t 2,15 2,11 TOSS 0 } 0 a In » l t u 1*4 53 213 50 to 145 OTBBAIX BBC. PACTOB ( t ) 70 70 70 70 70 70 TOOT 0 j 0 f tSCOTBBABLB 133 37 14« 35 42 101 0 BBCOVBBASLS CBADB kg 0 / t 0,75 0,»5 1.41 1.5» 1.2S 1.25

BST. COST/TOB « U S D (I) t t . l t S t . l t ' M . l t S t . l t S t . l t S t . l t

T B ISO/kg 0 12t I 3 0 3t M 0 A MO-130/kg D 113 31

"• •

B I130-2t0/fcg 0 "• •

B ISO/kg V V A MO-UO/kg V

• •

B 1130-240/1« 0 • • • ItO/kg 0 c B fSO-130/kg 0 • Il30-2t0/fcg B

http://tt.lthttp://St.lthttp://St.lthttp://St.lthttp://St.lt

-147 -

T U U I I I

BSTIMTBS «ID STATISTICS

«no» CAMIM BPLOMTIM CMPOMTIM SOUTH APMCA

paosrscr. PAH

LOCALITY

1 01ft - C

: ft ft

n» - A DBS

ft 9

AMITIOML

on

— r AM.

O U

AM.

on

Í AM.

MILUMC:

r r o | . ( • )

Pro» . Coat ( 1 )

1 1 t

|

BXCAT:

P r o s ( « 4 •>

P r a t - Coat

PER-14/ - S4

TABU III

tKSCUKt BSTIRAT» AH> STATISTIC»

u r n CAwnt mtaoATio» OOKTOIATIO» SOUTH AHICA

PB0SPBCT, fWM 051-P10 0 3 4 - » M t - 1 M 3 - M 1

LOCALITY

DULLIK:

Tn%. ( a )

Prof. Coat

Pra». Coat ( ! )

Ain. ctora. sunr: Pro», ha

Pre». Coat ( • )

m o HPL. cost: Pro». (ft)

TOTAL tXPL. COST:

Pre» . (1 )

on rot SAIDSTOR SÏBAX. Wat. I M U KAOT.

Af. TMICDUS ( • ) 1 .1» 0 . S 3 I . " 1 . 3

0SPTH t i n ( a ) 10 3 11 37

SPK. c u i m 2 . M 2 . * * 2 . * * 2 .*« O AUA 0P OUMOT (aa, • ) t «72 12 157 7 MS 14 «30

• COT-OPT O A M kg > , 0 a / t 0 . 5 0 . 5 0 . 5 0 , 5

• ion on la aitu 31 M » 2» MO 35 143 50 5*0 AT. C U M l a a i t u h» " , 0 , / t l . * 0 1 ,17 1 . « 1 .02

TOR 0 . 0 . l a o i t u SI 31 «3 «2

OVERALL U C . PACTOt (*) 70 70 70 70

TOR: o Jo f uoonuBLt 35 22 «4 «4 0 ISCOVnAALS CtADI k» V / t 0 ,»5 0 , « * 1.0» 1 .00

nr. cosT/Toi n u n (» M . M M , l * M . M M . l *

1 • fSO/k» 0

M . M M , l *

37 55

o A MO-130/fca. « 30 1« • • 1130-2*0/1« 0 s

1 ItO/k» V

"""~"~~—— ————— -—— ———"——"— — -— - - - - " - — ~ " • • - - - —

V A MO-'SO/kS 0

* B

• $130-2*0/1« 0

* B • f M/k» 0

c I • •0-130/ka. 0 9130-2*0/1« 0

PER-147 - 55

TAILS m

ISSOUKCS BSTIHATBS AID tTATISTICS

BWO» CAHBIDS SZPLOBATI09) C0SP09ÁTI0» SOOTH ATtlCA

l*OSPBCT, FAH

VUIOUS

-- ----—— -

034-P11 O49-M0.

LOCAUTT A S A S

MILLUC:

Trot,

Prof . Cost ( 1 )

A l t t . CSOPM. SOW:

Pro», ha

Pro». CMt ( » )

O i m BXPL. COST:

Pros . (1 )

TOTAL IIPL. COST:

Pros- ( ! )

OSS TIPS SAVDSTOM

STMT. MM. UNtft BSAU7.

AT. THICntSS (•> 0 , 7 * 0 . » * 0 ,71 0 , 9 3 0 . 7 0 1.27

DSPTH IAKS ( • ) 0 - 1 5 0-15 0-15 0-15 21 29

SPSC. CaAVITT i . * « 2 ,9« 2 .9« 3 . « * 2 . 9 * 2 ,9«

O AHA OP OUBODT 13 429 t 033 5 055 57 S97 22 731 15 23)

• cvr-orr CIAC* kt "jOt't 0 . 5 0 . 3 0 , 5 0 , 3 0 . 3 0 .5 • TO» Ott in s i t u 29 427 20 S12 9 54* 143 225 42 325 51 454

AT. «ADS to a l t u ta 0 , 0 g / t 1 ,23239 0 ,9293* 1,470»S 0 ,7490« 1.3< 1.30

TOSS D , 0 ( to « i t u 33 17 14 107 37 47

OVBIAU, U e . PACTOB («) 70 70 70 70 70 70

TOM OJOJ UCOVHtABLS 23 12 10 75 40 47

0 tSCOVCSAKJ eiAOS k( U/t 0 , 7 3 0 . 4 « 0,07 0 .44 0 . 7 9 0.77

tST. COST/TO» HILUD M , 1 S »9 .19 94 ,1« S9 .19 94 ,14 S9.14

f • f S 0 / k | v

S9 .19 94 ,14

0 A I S O - l M / k t 0 I t 34 40

• • »130- 2*0/kt U 10

• • ISO/kt 0

0 A IS0-13O/*s 0 •

B

1

* 1130-240/kt o 94

B

1 s «sorts o C • ISO-UO/kt 0

9130-2*0 ,kt 0

»_« J . _ - J

PER-147 - 56

2.3 Molybdenum Potential

Molybdenum mineralisation Is frequently associated with uranium occurrences in the rocks of the Southern Karoo, unfortunately only limited data are available, as exploration companies did not always assay for molybdenum and/or did not submit molybdenum information to NUCOR. It is however estimated that approximately 28 000 t in situ Mo is present in the known deposits of the Southern Karoo. Sixty percent of this figure occurs in the Rystkuil Project, Haanekuil, Kareepoort and De Pannen deposits.

Table XIII is a summary of the estimated molybdenum resources of the Southern Karoo.

PER-147 - 57

TABLE XIII SUMMARY OF THE ESTIMATED MOLYBDENUM RESOURCES OF THE SOUTHERN KAROO

DEPOSIT TONS ORE ESTIMATED Mo GRADE TONS Mo in situ kg Mo/t in situ in situ in situ kg Mo/t in situ

Ezelfontein 222 000 0,616 137 Blaauwhoogte 996 600 0,380 378 Sandgat 396 000 0,604 239 Bok se Plaas 251 700 0,194 49 Klipbankskraal 97 200 0,251 24 Rystkull+Ext 10 996 661 0,675 7 423 Roridom 2 027 520 0,825 1 673 Banksgaten 1 607 009 0,449 721 Plathoek 726 153 0,699 508 Tierhok 2 145 981 1,291 2 770 Suurkop 897 620 1,291 1 159 De Pannen 2 218 768 0,999 2 218 Kareepoort 6 803 887 0,675 4 593 Haanekuil 4 096 962 0,675 2 765 DR-3 1 221 130 0,250 305 GT-7 900 336 0,250 225 Dawldskolk 3 081 000 0,250 770 Kaffersfontein 268 446 0,500 134 Driefontein 1 038 972 0,500 519 Agtersteland 488 166 0,550 268 De Goede Hoop 475 886 0,400 190 Paul'8 Sypher 167 421 1,639 274 Damsfontela 186 400 1,010 188 Bloemfontein 69 165 1,000 69 Waterval 51 454 1,000 51 Braudewyosgat 50 590 0,910 46 Rletkuil 726 463 0,ll8 85

TOTAL 42 209 490 0,658 27 781

PER-147 - 58 2.4 Economic Viability

The uranium deposits of the Southern Karoo represent the largest concentration of uranium outside the Uitwatersrand Basin, and also the country's only significant viable source of molybdenum. However, the scattered nature and limited tonnage militate against the economic exploitation of the individual deposits.

A preliminary feasibility study (Toens et al. 1980) showed that the Southern Karoo deposits are marginally viable if collective mining and custom milling techniques are employed. Since then the resources of the 4 major deposits east of Beaufort West, i.e. Rystkuil Project, Haanekuil, Kareepoort, and De Pannen, increased and now comprise 50 Z of the Southern Karoo's total uranium, and 60 X of the total molybdenum resources.

Due to the relatively high tonnage and close proximity of these 4 deposits, this area is regarded as having the biggest potential to develop into a mining distric.:. The following is a review of the economic viability of exploiting these deposits on a collective mining principle, using the same mill and uranium plant.

2.4.1 Data used for profitability analysis

2.4.1.1 Ore reserves

Tons ore kg u 3o 8/t in situ

Tons U recover.

kg Mo/t in situ

Tons Mo in situ

Tons ore kg u 3o 8/t in situ

Tons U recover.

kg Mo/t in situ

Rystkuil Haanekuil De Pannen Kareepoort

10 996 661 4 096 286 2 218 768 6 803 887

1,04095 1,0 0,9996 1,0

6 791 2 430 1 316 4 036

0,675 0,675 0,999 0,6/5

7 423 2 765 2 218 4 593

Total 24 115 602 1,019 14 573 0,7 16 999

PER-147 - 59

2.4.1.2 Life-of-mlne

By phasing in the different deposits to keep a constant mine output of 3 600 tons per day, and a milling rate of 2 200 tons per day, averaging 350 days per year, the life-of-mine would be 20 years.

2.4.1.3 Ore sorting

Based on testwork by Esso Minerals, both the uranium and molybdenum grades are improved by 32 Z, if radiometric ore sorting is utilised.

2.4.1.4 Metallurgical recovery

Pilot plant tests carried out by Esso Minerals showed that the process recovery for uranium is expected to average 89 Z and for molybdenum 85 Z. Overall recovery (mining and metallurgical) is estimated to be 54 Z for uranium, and 52 Z for molybdenum.

2.4.1.5 Uranium and molybdenum prices

A uranium price of $30/lb U.Og at an exchange rate of Rl » $1 was used to determine the revenue per kilogram of uranium metal of R78,05. This figure is basically the same as using the current uranium spot market price of $15/lb UJJ- and an exchange rate of Rl - $0,50.

Two molybdenum price scenarios were used for the purpose of this report, viz. R10,00/kg Mo, to reflect a low-price scenario and R13,08/kg Mo, to reflect current price levels.

2.4.1.6 Capital expenditure

Figures obtained from a feasibility study of the Rystkuil orebody* by Esso Minerals were escalated to obtain the capital expenditure for the purpose of this report.

PER-147 - 60

The capital cost up to the first year of production is expected to be R110 million over a pre-production period of 3 years. This figure includes housing, land purchase, aill and nine construction at the Rystkuil Project. Capital expenditure to construct iolnes at the other three deposits is as follows: Haanekuil R6 Billion, Kareepoort RIO million, and De Pannen R4 million.

2.4.1.7 Operating costs

Based on figures obtained from Esso Minerals* and escalated, the average mining cost is expected to be R16,30 per ton, the sorting and process cost Rl?,26 per ton, the transport cost R4,00 per ton and management and administration cv,st R0,80 per ton. Operating costs were Increased as the other three deposits come on stream.

2.4.1.8 Taxation

The following tax formula was used to calculate the tax payments:

480 Tax rate (I) - 6C - x times 100

where x * Taxable income Gross Revenue

Table XIV is a summary of the production schedule and economic considerations for the four major deposits east of Beaufort West. Lease payments for the State-owned Kantkraal orebody were not included In the tax calculations.

2.4.1.9 Discussion

The collective exploitation of the Rystkuil Project, Haanekuil, Kareepoort and De Pannen deposits in the Southern Karoo is viable at

* Esso Minerals figures calculated during 1981, were escalated at 15Z per annum to obtain an estimate for the purpose of this report.

TABLI XIV SUHIAKT OF THE PMOUCTIOV SCHEDULE AID SKOKOHIC COniDEDATIOm roi THE rOUl MAJOt DEPOSITS EAST OP BEAUFORT WEST

DEHOR m-mncm HSTOIL + BXBBWINB WMMMI1. MBflHXT B M N B

TB* 1 2 3 4 5 6 7 8 9 10 U 12 13 14 15 16 17 18 19 20 21 22 23

* - ^ - U 0 3 1260 1260 1260 1260 1260 1260 1260 1260 1260 1260 1260 1260 1260 1260 1260 1260 1260 1260 12CO 173.6

Ika» a l l ta t «W 3 770 770 770 770 770 770 770 770 770 770 770 770 770 77C 770 770 770 770 770 1X1,75

*m~m**. 0 1.38 1.38 1.38 1.38 1.38 1.38 1.38 1.38 I . * 1,32 1.32 1.32 1.32 1.32 1.32 1.32 1.32 1,32 1,32 1.27

t o a t l l l s / t (to 0,89 0,89 0,89 0,89 0,89 0,89 0,89 0,89 0,89 0,89 0,89 0,89 0,89 0,89 0,89 0,89 0,89 1,16 1.32 1.27

D IMactfoB 799 799 799 799 799 799 799 799 720 769 769 769 769 769 769 769 769 769 768 107

K, RV&KftlOH 383 585 585 585 585 585 585 585 595 585 585 585 585 585 385 585 585 759 865 121

I * » » M O » 70,0 70,0 70.0 70,0 70,0 70,0 70,0 70,0 63,8 67,6 67,6 67,6 67,6 67,6 67,6 67,6 67,6 69,9 71.3 »,» Ojpltal Bcpad. telO* -36.67 -36,67 -36.67 -3 -3 -5 -5 -2 -2

Cb«w*« 0*t ««10* -36 -36 -36 -36 -36 -36 -36 -36 -38 -38 -38 -40 -40 -40 -40 -40 -40 -43 -43 -6.3

OwHad l o a UdO» -36,67 -36,67 -36.67 - 1 » -76 -*2 -« f taft t or l o a telO* -36,67 -36,67 -36.67 -76 -42 -8 26 34 34 31 31 25.8 24,6 24,6 27,6 27,6 27,6 27,6 25.6 25,6 24,9 26,3 3.6

TtaRxlO* -12,24 -17,04 -17,04 -15,24 -15,24 -12,42 -11.52 -11,52 -13,32 -13,32 -13.32 -13,32 -12,12 -12,12 -11,58 -12,36 -1 .M

ATMT « • Oak »la» «-10* -36.67 -36,67 -34,67 3* 3* 34 13,76 16.96 16,96 15,76 13.76 13,38 13.08 13,08 14,28 14,28 14,28 14.28 13.48 13.48 13,32 13,94 l .M

RTVtoO* -31.53 -58.6* - « . 9 3 -63,37 -47,39 -33.65 -28,87 -23,80 -19,44 -15,96 -12,97 -10,78 -8,94 -7.37 -5,88 -4,61 -3,51 -a.57 -1,80 -1.13 -0,59 -0,08 -0,03

PER-147 - 62

current price level* of R.78,05 per kilogram U and RJ.3,08 per kilogram Mo. A Discounted Cash Flow Rate of Return (DCFROR) yield of 22,55 X before tax, and a yield of 16,3 X after tax render this a marginally viable investment opportunity. A yield of 14,94 X after tax was obtained using the same uranium price and a molybdenum price of R10,00/kg Mo.

An annual uranium production of 800 tons and molybdenum production of 585 tons Is attainable from these deposits.

However, the current oversupply of uranium overhanging the market militates against the negotiating of loag-term contracts, and selling on the spot market, although profitable at current exchange rate levels, might prove to be too risky in the long run, because of price and exchange rate uncertainties.

In order to study the effect of the exchange rate on the yield should the producer sell the uranium on the spot market, a sensitivity analysis was carried out. If the exchange rate changes from Rl • $0,5 to Rl - $0,6 and the uranium ard molybdenum prices stay at the levels quoted previously ($30/lb U.O. and R13,08/kg Mo respectively) th«> yield drops from 16,3 X to 8,92 I on an after-tax basis, at Rl • $0,7 the yield drops to 4,43 X. To negate the effect of an increase in the rand/dollar exchange rate on the yield, a 20 X Increase in the uranium and molybdenum price is neccesary for every 0,1 point exchange rate recovery.

Taking cognisance of the above, the Southern Karoo deposits will not be developed in the short to medium term, unless an urgent need for the molybdenum content arises. South Africa's current molybdenum needs arc approximately 600 tons per year, all of which Is imported to supply the need of steel manufacturers.

PER-147 - 63

3. SOUTHERN ORANGE IREE STATE

3.1 Historical Revlev and Exploration Statistics

Uranium exploration in the Southern Orange Free State started after the discovery of radioactive anomalies in sandstones of the Lower Beaufort Group.

Apart from limited investigations by Goldfields in the Colesberg district, other companies, except xor Rio Tlnto, were not interested in exploration ventures in the Southern Orange Free State region.

A total of R3 million was spent on exploration and development studies. Drilling amounted to 188 000 m. Taking only RAR + EAR resources recoverable at Jesf than $130/kg U into account, an average of 5,9 kg U.O» was discovered per metre drilled, and R2,75 was spent to discover one kilogram of U,0,,.


The Southern Orange Free State RAR + EAR uranium resources recoverable at less than t 130 /kg U are estimated at 658 t U. To account for mining and metallurgical losses a correction factor of 70 Z was applied. The average in situ grade of the deposits was calculated to be 0,533 kg VJ)Jt (0,316 kg recoverable U/t) over a mining width of one metre.

3.2.1 Rio Tibto Exploration (Pty) Ltd

During late 1977 Rio Tinto took areas north and east of Edenburg under option. A detailed investigation of a small uranium occurrence on the farm Fortuln, together with airborne radiometric surveys and ground investigations, led to the discovery of the Mooifontein deposit and several other small occurrences.

PER-147 - 64

Fig 16 Is a locality map of the uranium deposits discovered in the Southern Orange Free State.

After metallurgical testwork and pilot plant feasibility studies had been carried out on a 100 ton bulk sample from the Mooifontein deposit, Rio Tinto bought the mineral rights to the Hooifontein and Plaatjiesfontein deposits and ceased prospecting during 1982.

Table XV is a summary of the resource estimates of the orebodies discovered by Rio Tinto Exploration (Pty) Ltd.

4. EASTERN ORANGE FREE STATE


Airborne radiometric reconnaissance surveys during the latter half of 1976 Indicated a number of radiometric anomalies in the Senekal, Ficksburg, Fouriesburg and Bethlehem districts. Ground follow-up located uranium occurrences in the Molteno Formation and properties were optioned by Karba Minerals Inc. (a joint venture between Union Carbide Exploration Corporation - Southern Africa and Goldfields of South Africa (Pty) Ltd).

A total of R5,7 million was spend on exploration and 50 900 m were drilled. Taking RAR + EAR resources recoverable at less than $130/kg U into account, an average of 39,2 kg U.0 g was discovered per metre drilled, and R2,87 was spent to discover one kilogr£(D of U^Og.

Bloemfonttin

&v

IVEDOeRSeURO

f

E v / 3 OUTCROP OF LOWER BEAUFORT

«B> URANIUM DEPOSITS

gure 16. Locality map of the uranium deposits in the Southern Orange Free State

PER-147 - 66 TABU IV

HSOUKCB ESTIMATES AID STATISTICS

COHPAaT BAMZ: »10 TIKTO «XPLOBATIOH tPTT) LTP

PBOSPECT, PAJM

•AM

IDEVBUBC

HOOI-

Foart»

• PLAATJIBS-

POBTBIB A

m

PLAATJIBS-

POBTBIB P

DBILLIBC:

Pro». ( • )

Pro«. Coat ( • )

1B7 947

1 19* «51

•XCAV:

Pros

Prog- Coat ( • )

74*

17 *B0

A I D . CKOPK. SUIV:

Pro». kB

Prog. Coat (8) • 048

OTHta BXPL. COST:

Pro». ( » ) 1 B2S 7S1

TOTAL EXPL. COST

Prog. ( » ) 3 047 330

OU TYPE

STKAT. HOB.

SAVDSTOBE

LOWBX BEAU-

POBT

A*. THicnrass (•) DtPTH BAKB (a)

SPBC. CAAVir.

0 ABBA OP OBBBODV (aq • )

h cvr-orr cBADt k« u 3 o a / t B TOBS OBB In a l t u

AT. CBADB in a i t u kg V } 0 ( / t

TOBI UJOJ i n a i t u

OTBBAU. BBC. PACTOB (%)

TOBS U , 0 § BBCOVEBABLB

V BBCOVBRABLB CRAM kg U/ t

1 .7*

1 0 , 2

2..*

190 *»2

0 . 3

•39 000

0 , ( 5 471

717

70

502

O . i l

1 .11 7 . 0

2 . 5

12 500

0 . 3

34 *»7

0 , ( 3 7 1 3

22

70

IS

0 . 3 »

1.71

25 .9

2 .5

17 S44

0 . 3 75 000

0 ,71*

34

70

3«

0 ,42

1ST. COST/TOB MILLBD ( I ) 70 .00

1 7 0 , 0 0 70,00

T B SBO/kg 0

0 A $»0-130/kg U

• B |13O-2(0/kB 0

423 13

g f aO/kg U

V A fSO-130/kg 0

B $13O-2*0/kg 0

32

B S JI0 /kg U

C B ISO-130/kg U

S130-2*0/kg V

• Hlnaral r i g h t ! bought out

PER-147 - 67 TABU I *

BSTIHATBS AMD STATISTICS

»10 TITO PPtOlATIO» (PTT> LTD

nosptct. PAS* SCHOOB-

" " ™ " •AKCMSCOP romuni cBzicm MTHAVT

DBILLIK:

Pro». ( • )

Pro» . Cost ( 1 )

nCAT:

Pro» (of, •>

Pro» Coat ( « )

A l l » . CtOPH. SUE»:

Pro», ka

Pro». Coot ( » )

ran n*L. COST: Pro». ( « )

TOTAL EZPL. COST:

Pro». ( » )

O U TTPt

Pro». ( » )

O U TTPt SAtfDSTOR

STBAT. HOB. LOWn BBAU-

POBT

AT. THICOBSS ( • ) O.M l . » 2 1 ,35 1 . 0

DBPTH BABCS ( • ) 1 4 . 3 Í . 5 1 4 . 2 1 7 . 0

S P K . CBATITI 2 . 5 2 ,5 2 . 5 2 . 5

O ABBA OP OBBBODT (*q • ) ** 477 • S7B 42 5*3 12 500

B CVr-OPT CBADB k» O j O g / t 0 . 3 0 , 3 0 . 3 0 . 3

B TOM OBB In » l t u I t * 531 31 2*7 1 4 ! 750 31 250

AT. CBADff 1» « l t u k» OjOj/ t 0 ,9*401 0,517*2 0 .WS17 0 ,4*14

TOM 0 0 . In «lUi 1*2 1» 125 14

OTEBALL BBC. PACTOB

PIN-853(B/R)-68

4.2 OranliuB Resources

The Eastern Orange Free State RAR + EAR uranium resources recoverable at less than i 130/kg U are estimated at 1 182 t D. To account for mining and metallurgical losses a correction factor of 70 Z was applied. The average in situ grade of the deposits was calculated to be 1,76 kg U,0g/t (1,04 kg recoverable U/t) over a nining width of one metre.

4.2.1 Karba Minerals Inc. (Union Carbide/Goldfields Joint Venture)

Karba Minerals was the only company that prospected in the Eastern Orange Free State. Operations were carried out since 1< te 1976 to 1982, after which the areas were abandoned.

Fig 17 is a locality map of the uranium deposits discovered in the Eastern Orange Free State.

Table XVI is a summary of the resource estimates of the orebodies discovered by Karba Minerals.

5. QVA-QVA


During 1979 Mining Corporation Ltd. discovered radiometric anomalies in Qwa-Qwa during a carborne survey. Follow-up surveys located several major uranium anomalies 1c the Elliot Formation.

A total of R335 000 was spend on exploration and drilling amounted to 16 440 m. Taking only RAR + EAR resources recoverable at less than $130/k U Into account, an average of 38,4 kg U-0fl was discovered per metre drilled and R0,53 was spent to discover one kilogram of U3O0.

Figure 17 Locality map of the uranium deposits in the Eastern Orange Free State

PER-147 - 70

TABLt m

RESOURCE ESTIMATES AID STATISTIC*

COHPABY BAKE: KAMA KIEEBALS VK.

PROSPECT, PABH •AMI LOCALITY

DBIU.IK: Prof. (a) Prog. Co»t {«)

•XCAV: Prof («q a) Prof. Cost (I)

AIM. CEOPH. SUKV: Prof. ka Prof. Co«t (1)

OTHER EXPL. COn-.

Prof . (B)

ROSEKDJU.

TOUBLABDS

BOSEEDAL TOVBLABDS

ID'S ECSTACY

EASTERN ORABGE PEES STATB

241 229 3 395 «58

103 OO0

TOTAL BXPL. COST: Prof. (B)

OBB TYPE STBAT. HOB.

AV. THICKVESS (a) DEPTH RABGE (a) SPEC. GRAVITY AREA OP OBEBOOT (iq a) CVT-Orr CRADB kf ",0,/t TOBS O U in »itu AV. 6IADS in « l t u kf OjOg/t

TOBS UjO $ in t l t u

OVEBAU BBC. PACTOB

PER-147 - 71

Rand Nines carried out an airborne radiometric survey in the Qwa-Qwa area during 1982. After optioning and limited investigations, no further work was done.


The Qwa-Qwa RAR + EAR uranium resources recoverable at less than $130/kg U are estimated at 375 t U. To account for mining and metallurgical losses a correction factor of 70 Z was applied. The average In situ grade of the deposits was calculated to be 0,22 kg ILOg/t (0,13 kg recoverable U/t) over a mining width of one metre.

5.2.1 Mining Corporation Ltd

Mining Corporation prospected from uranium in Qwa-Qwa during the period 1979 to 1981, after which all areuS were relinquished.

Five major anomalies, viz. River/Trench, Waterfall, Village, Dam and Comet were investigated. Resources were proved for the River/Trench anomaly which is made up of numerous small orebodies.

Fig 18 is a locality map of the uranium anomalies and orebodies discovered in Qwa-Qwa.

Table XVII is a summary of the resource estimates of the orebodies discovered by Mining Corporation Ltd.

FGR-1Í? - 72

PER-147 - 73

TU< * m i RESOURCE ESTIMATES ABD STATISTICS

c OMPABY BANE: MIBIVC COBPOBATIOB LTD c 1 PBOSPICT. FAB* QWA-QUA BIVEB /

RIVER LOOT:; BIVEB B+S BIVEB,RIV E

BIV TBBBCM I BIV TBEKCH II

TRBVCH I, TRBW» II, TBEBCH III

VILLAGE

DBIIXIK: Pro», (a) Pros- Coat (8)

1» 440 111 232

TRBVCH I, TRBW» II, TBEBCH III

VILLAGE

EXCAV: Prce 335 000

I 1 i i 1 . . .

OBI TYPI STRAT. HOB.

SABDSTOBB EILICT

AV. THICKHS3 (a) DEPTH BABCE (:.) SPEC. GRAVITY

0 AREA OP OR8BO0V (aq a) • CUT-OPT GRADE k* U }0 (/t • TOES ORE In altu

AV. GRADE In attu k« 0,-,/t TOES UJOJ In attu OVERALL REC. PACTOB (1) TOES UJOJ RECOVERABLE 0 RECOVERABLE CRADB M U/t

•.0 05-18,5

2,86 43 590

0.5 4*3 800

0.8 371 70

280 0,47

2,27 13-48 2,(8

34 182 0.2

208 400 0,577

119 70 83

0,34

1.33 1-20 2,«(

58 725 ».2

203 700 0,34

(9 70 48

0,20

1.27 13-38 2.88

58 700 0.2

1*8 300 0,388

72 70 51

0,22

2,5 7-25 i.t»

38 7(7 0,2

257 800 0,4(2 119 70 83

0.27

EST. COST/TOE HILLED (1) (0,00 «C,00 80,00 (0,00 (0,00

T 0 • 8

U

• 1 c

E SSO/ks U A 180-130/*« U 1 1130-260/*» 0

220 71 41 43 T 0 • 8

U

• 1 c

B f80/ks U A 180-130/k* U R «130-2(0/*« U

T 0 • 8

U

• 1 c

8 110/ks U 1 180-130/fcC U

tl30-2(0/k« 0 71

PER-147 - 74

6. CONCLUSIONS

Prospecting for sandstone-hosted uranium deposits was carried out in the Main Karoo Basin over a period of 17 years from 1969 to 1985.

Reasonably Assured and Estimated Additional Resources recoverable at less than $130/kg U proved by prospecting amount to 31 211 c U. Table XVIII gives a breakdown of resources discovered in the various regions.

TABLE XVIII URANIUM RESOURCE ESTIMATES- MAIN KAROO BASIN

Region

RAR EAR

Region

PER-147 - 75

The discovery rate, i.e. kg U,0„ p

uranium prospecting in the main karoo basin in ......uraanverkope en die huidige ooraanbod van uraan...

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