GOVERNMENT OF RAJASTHAN

OFFICE OF THE SUPERINTENDING GEOLOGIST, JODHPUR

Department of Mines & Geology

Final Progress Report Project No. – LS – 9 (2008-2009)

Exploration by drilling for limestone near village Murkasni – Jhak, teh. – Bilara – Jaitaran, Ditt. Jodhpur and Pali.

By

R.G. Goswami B.S. Dhaka

Sr. Geologist Superintending Geologist

August - 2010

CONTENTS Acknowledgement

01. CHAPTER – 1 (Introduction)

1.01 Introduction

1.02 Location & Approach

1.03 Topography and Drainage

1.04 Climate & Rainfall

1.05 Targets & Achievements

02. CHAPTER – 2 (Geology)

2.01 Geology of the Area

2.02 Structure

03. CHAPTER – 3

3.01Regional Mineral Survey

3.02 Regional Geological Mapping

3.03 Detailed Geological Mapping

3.04 Sampling & Analysis

3.05 Tentative Reserves

04. Conclusion & Recommendations

05. List of Plates

(a) Regional Mineral survey map 1:50,000

(b) Regional Geological Map 1: 10,000

(c) Detailed Geological Map 1: 2,000

Annexure – I

Statement showing chemical Analysis Results of Samples.

ACKNOWLEDGEMENT

The work on this project was carried out by sh. R.G. Goswami, geologist, under

the supervision of sh.O.S. Sukhwal, suptdg. geologist, sh. B.S. Dhaka, sh,S.S.

Jamrani,sr.geologist.One of the author (RGG) is indebted to sr, officers for guidance

during project work.

CHAPTER - I

1.1 Introduction :-

Limestone is an important mineral and finds multiple uses in variety of industries like

cement, chemical, hydrated lime etc. In order to further augment the reserves, an area of

11.60 sq. km. was reserved in 2007-2008 n/v Murkansni, Teh. Bilara and Jaitaran, distt.

Jodhpur and Pali. Further a project was also kept in field programme of Jodhpur circle for

2008-2009.

The work included 150.00sqkm. RMS, 12.00sqkm R.G.M. and 1.50 sqkm D.G.M. As

a result of this work limestone bends were located at number of places. The grade of

limestone varies from cement chemical grade.

1.2 Location & Approach :-

The mapped area lies around Jhak-Markasni Kuprawas, Ransigaon, Jaton Ki Dhani,

Gujron Ki Dhani, khojon ki dhani,villages of Bilara tehsil Jodhpur Distt. and Sinla

village, Teh. Jaitaran Distt. Pali. The above mentioned areas are 100 kms. from Jodhpur

and are located along Jodhpur – Borunda and Bilara – Ransigaon tarred roads. Areas like

Jaton ki Dhani, Gujron Ki Dhani are connected with fair weather motorable roads. These

areas are also covered under survey of India sheet No. 45/15. The project area lies

between 26°15’ to 26°22’ lattitudes and 73°45’ to 73°50’ longtitudes. Bilara and Pipar

City are the nearest railhead for this region.

1.03 Topography & Drainage :-

In general, the area is plain terrain with slight undulations here and there. The plains

are occupied by alluvium and small mounds. Hillocks – ridges comprises different types

of limestone. The minimum and maximum elevation in project area is 272 mts. and 333

mts from mean sea level. The general slope of the area is towards south west. The area is

drained by Luni River, rivulets and seasonal nullahs.

1.04 Climate and rainfall :-

The area has semi arid climate. The main vegetation is seen in form of Acacia, Khejri,

Rohira trees. Small shrubs and thorny bushes are also noticed. The temperature variation

is 40-45°c in summer to below 10°c in winter. Water is obtained by people from were

T/W agree point of view the area is quite potential and crops like Bajra, Chilli, Wheat,

Raira are grown.

1.05 Targets & Achievements :-

The target achievement position on this project is given below.

Table 1 showing target- achievements

S. NO Nature of Work Annual Target Achievement

1 R.M.S (sq. km.) 150.0sq km 150.0 sq km

2 R.G.M. (sq. km) 10.0 sq km 10.0 sq km

3 D.G.M. (sq km) 1.50 sq km 1.50 sq km

4 Sampling (nos) As req 31

CHAPTER – II (GEOLOGY)

2.01 Geology of the area :-

The rock types occurring in the area are part of Bilara group of rocks, which has been

included in Marwar Super Group. The chemical and cement grade limestone represent

the Gotan formation which forms the middle part of Bilara group. The Gotan formation

consists of interbedded limestone dolomite and dolomite limestone. The detailed studies

by G.S.I. has revealed the following succession for Marwar Super Group on the basis of

lithological character, order of super position and strike continuity. The succession also

shows the position of Gotan formation.

MARWAR SUPER GROUP

Nagaur Tunklian Sandstone, gritty and pebbly sandstone.Group Formation

Nagaur Siltstone, claystone, sandstone and gypsumbeds.Fromation

Bilara Pondlu Dolomite, Chert, cherty, limestone and siltstone.Group Formation

Gotan Limestone, dolomite, limestone dolomite.FormationDhanapa Chert, cherty, dolomite, calcareous shale.Formation

Johpur Girbhakar Fine grained sandstone, gritty and pebbly Group Formation sandstone.

Sonia Interbedded sandstone, and shale with minor chart,Formation cherity dolomite.

Rock formations occur in form of continues linear bands whose strike continuity is

traceable for 18 kms. in NE-SW direction from Kuprawas to Haryadhana. The most

prominent formation is dolomite limestone. Associated with this are thin bands of black

coarse crystalline and fine grained, limestone having grey to grayish brown colour, chert

occurs as capping and is found on top of ridges and in elevated portions. Clay pockets are

also associated with dolomite formation and limestone.

2.02 Structure :-

Rock formations covered under mapping occur as linear bands whose surface

manifestation appear in form of continuous parallel ridges separated by ag. fields or

alluvial plains. The general trend of formation is N10°E to N 35°E with low to gentle

dips (15-45°). At places dips very from 55 to 70°. The dip direction is NW and SE. The

strata have been folded into series of antiform synform structure. At places limestone has

horizontal disposition. 2 sets of joints are observed. Some workers have described the

presence of rolling dips due to collapse breccia and slump structure. Limestone is part of

a sedimentary sequence and it is inferred by some workers that rocks have not been

deformed. But recrystallisation of limestone has taken places.

CHAPTER – 3

3.01 REGIONAL MINERAL SURVEY :- (1:50,000)

RMS was taken up near Ransigaon, Jhak –Murkasani Gujron ki dhani, Khojon ki

Dhani, Located in Sheet 45 F/15, teh Bilara. Following are salient observation of RMS

work.

1- Ransigaon : - Mounds and ridges of creanishto rey dolomitic limestone

were observed in E and NE of this village. Total area is 5 x 1.5 sq. km.

The dolomite formation is associated with thin bands of chert & grey

limestone.

2- Khojon ki Dhani :- Dolomitic limestone associated with grey limestone

is observed intermittently for 2kms. length in NE-SW direction.

Limestone observed at 3 places extent of such bands is 200 is 400 mts.

length and 10-15 mts. width.

3- Gujron ki dhani :- Here also inter bedded sequence of limestone and

dolomitic formation was observed. The extent of limestone is 2000 x 100

mts. chert is also noticed in limestone.

4- Jhak : - Rocky out crops work observed in NE and S of this village in

form of dol. Lst. Grey limestone having 50-10 mts. length 5-10 mts.

width. Area E of Jhak i.e. along luni river is covered with alluvium.

5- Area aound Murkasni :- The area located to the E,S & W of Murkasani

comprises the reserved block. Here grey fine grained to black crystalline

limestone is occurring associated with dolomitic limestone of siliceous

nature. Limestone have variable dimension i.e. 500m x 500, 600 x 100m,

1000 x 125m, 200 x60m, 200 x 10 mts.

3.02 RGM (1:10,000) Regional Geological Mapping was carried out in area reserved

for departmental prospecting, rock types occour as mounds on ground level and also as

ridges having NE-SW trend and variable dips. There are numerous pits available in the

area which are showing the presence of grey to black crystalline limestone below

dolomitic and soil cover. Following is brief description of pits and limestone occurrences.

1- Pit NE of Murkasni - 200 x 60 – grey limestone 2- Pit on Jhak Murkasni Rd. - 100 x 40 – black crystalline 3- Pits SE Murkasani - 300 x 75 – grey to black crystalline below 2

mts. dolomitic cover, total area of limestone is 1000 x 125 mts.

4- Pits SW of Murkasni - 50 x 30, 50 x 20 black crystalline total area 600 x 100 mts. 5- Pits along Bogasni- Sinla Rd. - 70 x 5, 50 x10, 200 x 15,- black and grey

limestone total area of limestone at 2 places is 600 x 100, 500 x 500 mts.6- Pit on Sinla Murkasni Rd. - 150 x 50 x 10- grey limestone occurs from

1.50 to 10 mts. depth, o.b. is dolomitic limestone.

7- Pit on western corner of reserved area - 200 x 60 – grey limestone , total area 200

x60 mts.

In general the depth of above pits varies from 3 to 10 mts.

Besides, Pits, grey limestone bands were also observed around Gujron ki Dhani,

jaton ki dhani in 2000 x 100 mts. area. 3 small bands of limestone area also located south

of Murkasni. About 2.5 kms. SW of Murkasni 3 thin bands of limestone also noticed.

Length is up to 200 mts. width 10 to 20 mts.

Many leases are sanctioned around Murkasni. Even in the reserved block mining

has taken place for 2 decades.

3.03 DETAILED GEOLOGICAL MAPPING :- (1:2000)

Detailed mapping was carried out in SE of Murkasni and along Bogasni- Sinla

Road. Pits of 300 x 75, 70 x 5, 50 x 10, 200 x 15 mts. size were marked. In area SE of

Murkasni grey limestone having 5 mts. thickness occurs below 2 mts. o.b. of dolomitic

limestone. Here limestone area is 1000 x 125 mts. while in pits located along Sina Rd.

limestone occurs below soil cover only. Trend of formation is N 200 E with horizontal

disposition of beds. At places 100-200 dips in NW & SE direction are also noticed.

3.04 Sampling & Analysis : - 31 samples collected for analysis purpose and results of

27 are received. Perusal of analysis shows 0.30 to 8.25% SiO2 , 47.32 to

54.88% CaO, 0.20 to 2.00% MgO in limestone. Few samples are of dolomitic

character having 5 to 20% MgO, upto 2.34% SiO2. Two samples are of cherty

limestone.

3.05 Tentative reserves :- The area covered under RGM was reserved to assess its

potentiality for cement grade limestone, it is apparent that field observations can lead to a

tentative reserve position. There 9 bands of grey to black limestone in the area. Extensive

mining earlier has resulted in excavation of large quantity of mineral. These bands have

variable and dimensions. Following method shall provide a reasonable and just picture.

1- Limestone SW, S, SE of Murkasni - reserves (in tonnes)

2000 x 100 x 3 x 2.5 - 1500000

1000 x 25 x 3 x 2.5 - 937500

600 x 100 x 3 x 2.5 - 450000

300 x 20 x 3 x 2.5 (4 bands) - 180000

2- Limestone between Bogasni- Sinla and along Sinla- Murakasni Rd.

600 x 100 x 5 x 2.5 - 750000

500 x 500 x 5 x 2.5 - 31250000

150 x 50 x 10 x 2.5 - 187500

Total - 4062500

Grand Total - 7130000

- or 7.13 million tonnes of

limestone.

It is clear from above that these reserves are not sufficient for a cement plant as

such the area may be dereserved.

ANNEXURE – I

Statement of chemical analysis of Limestone sample received from n/v Jhak, Murkasani, Bogasani Sinla dist Johdhpur

S. No Sample MarkContent in percent

SiO2 A. Ins. Fe2O3 Al2O3 CaO MgO LOi1 Ls-9/RGM-1 1.76 0.28 0.28 0.28 29.96 20.75 46.442 Ls-9/RGM-2 2.34 0.30 0.28 0.32 30.52 20.15 46.003 Ls-9/RGM-3 0.50 0.12 0.14 0.24 54.88 0.40 43.644 Ls-9/RGM-4 0.40 0.10 0.14 0.16 52.08 2.81 44.225 Ls-9/RGM-5 6.36 0.78 0.28 0.36 50.68 0.80 40.70

6 Ls-9/RGM-6 0.60 0.60 0.14 0.14 54.60 0.40 43.347 Ls-9/RGM-7 0.30 0.08 0.48 0.14 32.48 19.52 46.948 Ls-9/RGM-8 2.16 0.18 0.28 0.26 53.76 0.40 42.789 Ls-9/RGM-9 0.98 0.12 0.14 0.24 53.48 1.40 43.6210 Ls-9/RGM-10 1.56 0.26 0.28 0.22 53.20 1.20 43.1211 Ls-9/RGM-11 3.48 0.28 0.42 1.18 51.80 0.80 41.6012 Ls-9/RGM-12 1.80 0.24 0.28 1.04 53.20 0.40 42.2413 Ls-9/RGM-13 2.42 0.32 0.42 0.34 52.64 0.40 41.8014 Ls-9/RGM-14 2.02 0.24 0.28 0.78 53.20 0.40 42.2415 Ls-9/RGM-15 20.42 0.92 0.28 1.16 42.00 0.80 33.8816 Ls-9/RGM-16 2.72 0.24 0.28 0.90 52.92 0.40 42.0217 Ls-9/MB-5 4.42 0.34 0.28 0.78 51.80 0.40 41.18

18 Ls-9/BS - 7 3.42 0.42 0.28 0.96 52.04 0.40 41.3619 Ls-9/BS - 8 2.08 0.28 0.42 1.02 52.08 0.60 42.2420 Ls-9/BS - 9 1.38 0.18 0.28 0.76 53.48 0.60 42.6821 Ls-9/MS - 10 8.25 0.75 0.28 0.30 49.56 0.60 39.6422 Ls-9/MS - 11 4.22 0.42 0.56 0.38 52.08 0.40 41.5023 Ls-9/MS – 12 9.24 0.28 0.96 2.08 47.88 0.20 37.8424 Ls-9/MS – 13 0.72 0.08 0.42 0.36 54.32 0.60 43.4025 Ls-9/MS – 14 1.20 0.24 0.42 0.40 52.36 2.01 43.3626 Ls-9/MS – 15 3.26 0.30 0.56 0.64 47.32 5.03 42.8427 Ls-9/MS - 16 42.04 0.52 1.14 0.88 22.40 6.84 25.44

Expenditure :- The project expenditure has been calculated as per the current

schedule of rates. :-

Work Rate (Rs.) Amount (Rs.)RMS - - -RGM 11.00 sq.km 1000/ sq.km. 11,000/-DGM 1.50 sq.km 150 / Hect. 2250/-

DRLLING - - -LOGGING - - -

SAMPLINGSpot-25 10/ sample 250/-

ANALYSIS 25 500/sample 12500REPORT Up to two copies Nil Nil

More than two copies 500/each 1500/-TOTAL 27,500/-

Supervision

charges 10%

2750/-

TOTAL 30250/-Service tax 10% 3025/-

TOTAL 33275/-Cess 3 % 998.25

Grand total 34273.25

In words thirty for thousand and two hundred seventy three and twenty five paisa.