geological report on limestone exploration of goyla block
TRANSCRIPT
Geological report on Limestone Exploration of
Goyla Block, Abadasa Taluka,
Kachchh District, Gujarat
Executive Summary
Prepared for
Commissioner of Geology & Mining
Government of Gujarat
Prepared by
Geovale service Pvt. Ltd
56, Ideal villas, Kochpukur, Rajarhat
Kolkata-700 156
West Bengal
January, 2017
Geological Report on Limestone Exploration of
Goyla Block, Abadasa Taluka,
Kachchh District, Gujarat
Executive Summary
Prepared for
Commissioner of Geology and Mining, Gujarat
Geovale Services Pvt. Ltd 56, Ideal Villas, Kochpukur, Rajarhat
Kolkata - 700 156 West Bengal, India
www.geovale.com E: [email protected]
January, 2017
Executive Summary
Goyla Block is in the Abdasa Taluka in the Kachchh District of Gujarat. It is a
N-S elongated irregular polygonal block with an area of 2.619 km2 (261.9 Ha)
having dimensions of approx. 3.6 km in length and 1.77 km in width. The
block is divided into two non-contiguous blocks (Goyla 1 in the north is 1.467 km2
area and Goyla 2 in the south is 1.151 km2 area). The Goyla block has been
part of regional exploration conducted by Commissioner of Geology and Mining
(CGM) through a Rapid Reserve Assessment Survey (RRAS) in 2009. The Goyla
Block was further explored in detail by Gujarat Mineral Development
Corporation (GMDC) in 2014-2015.
Cement grade nummulitic limestone occurs in the Go y l a B l o c k i n t he
Eocene - Oligocene Fulra Formation and Oligocene - Miocene Maniyara Fort
Formation, which are part of the Tertiary Platformal sediments of Kachchh.
Maniyara Fort Formation is exposed over most of the block, while nummulitic
limestones of Fulra Formation have been intersected only in diamond core
drillholes. Manyiara Fort Formation has shale, clay and sandy litho-units
interbanded thin limestone units. The multiple beds of greyish white to
yellowish grey micrite supported nummulitic Fulra Formation limestone define the
mineralised body. The cumulative thickness of the Fulra Formation limestones,
range from 12 m to 15 m. The cement grade limestone has a number of
partings of clay and shale. The overburden in the area, belonging mainly to
Maniyara Formation, range from 5 to 15 m most ly . However, towards the
southern part of the Goyla Block, shale and clay lithounits belonging to Khari Nadi
Formation, overlie Maniyara Fort Formation, thus contributing to development of a
thicker overburden of upto 35 m.
Goyla Block has a relief of ~23 m, with altitude ranging from ~30 m to ~53 m
above the MSL. The topography is gently rolling with a moderately elevated
landform at the southwestern and northeastern parts of the block. A
thin 1 – 3 m veneer of red brown soil overlies the Maniyara Fort Formation in
most part of the block. The block is located at about 32 kms from the Arabian
Sea coastline.
GMDC organized the topographic survey using Total Station theodolites.
DGPS surveys have been carried out to define the boundary of the block. 66
diamond core drillholes, totalling 2887 m have been drilled within the Goyla
Block in a 200m x 200 m grid. 674 half split core sample composites from 1 to 2
m length each were pulverized to 150 microns at site and sent to Inspectorate
Griffith’s (IG) wet chemical laboratory at Gandhidham in Gujarat for assay.
Element suite determined at IG's laboratory include SiO2, Al2O3, Fe2O3, TiO2,
CaO, MgO, P2O5, Na2O, K2O, Cl, SO3, R2O3 and LoI along with specific gravity
on Dried Air basis using IS standard procedures.
Geovale Services finalized the Geological Report of the Block based on the
data provided by the CGM and GMDC. It carried out the 3D Geological
Resource modeling of the ore body, using GEOVIA SurpacTM software. The ore
body modeling process involved developing a geological database from the
drillhole database, which has been validated by classical statistics and geo-
statistics. Surpac allows the data visualization by creation of sections along
desired directions and defining ore-waste contact by manual on-screen
digitization. The two stage solid modeling of the ore body by wire-framing the
digitized cross sections and block modeling (50m x 50m x 2 m blocks) on the
basis of geostatistically derived parameters allows estimation of 3D ore volume
and block wise grades. Resources and grades have been derived using krigging
interpolation methods.
Though the specific gravity ranged from 2.2 to 2.6, a bulk density of 2.25 has
been used as advised by the CGM, Gujarat for the tonnage determination of the
limestone ore body. A cut-off grade of 37% CaO and cut of width of 1.0 m
thickness of limestone band has been applied to determine the resource volume
and grade for every Surpac block.
In Goyla, GMDC carried out General Exploration (G-2 Stage) exploration. The
Geological Resource o f l i m e s t o n e i n t h e B l o c k has been classified
based on the Minerals (Evidence of Mineral Contents) Rules, 2015 notified
by the Ministry of Mines. The total Geological Resource established in Goyla Block
is 68 Mt of Indicated Mineral Resources (UNFC – 1997, 332 category).
Table 1 summarises the grade wise Indicated Geological Resource (UNFC 332) of
the Goyla Block (also separately shown for the two sub-blocks).
Table 1: Summary Resource Classification: Goyla Block
CaO% Range
Sub-Block 1 (North) Sub-Block 2 (South) Total
Volume (m3) Tonnes CaO% Volume (m
3) Tonnes CaO% Volume (m
3) Tonnes CaO%
37.0-40.0 630000 1417500 38.53 0 0 0.00 0 0 0.00
40.0- 42.0 630000 1417500 41.12 35000 78750 41.40 665000 1496250 0.00
42.0-44.0 1400000 3150000 43.10 470000 1057500 43.18 1870000 4207500 0.00
+ 44.0 15670000 35257500 47.55 11655000 26223750 47.31 27325000 61481250 47.45
Grand Total 18330000 41242500 46.68 12160000 27360000 47.13 30490000 68602500 46.86
The following table provides the summary information about Goyla Block.
Table 2: Summary Information Table: Goyla Block
Name of the Block Goyla
Location Summary
Village Goyla, Mokhra
Taluka Abdasa
District Kachchh
State Gujarat
Area Summary
Size of the block (Sq km) 2.619
Boundary coordinates: Goyla – 1
Point Easting Northing Latitude Longitude
BP 01 478480.993 2593917.415 23°27'18.391" 68°47'21.509"
BP 02 478603.970 2594063.068 23°27'23.133" 68°47'25.836"
BP 03 478989.053 2594213.020 23°27'28.027" 68°47'39.402"
BP 04 479334.752 2594465.232 23°27'36.244" 68°47'51.574"
BP 05 479919.512 2594639.927 23°27'41.951" 68°48'12.177"
BP 06 479979.000 2594552.654 23°27'39.116" 68°48T4.279"
BP 07 479949.113 2594438.747 23°27'35.411" 68°48T3.231"
BP 08 479955.533 2594400.000 23°27'34.151" 68°48'13.459"
BP 09 479909.184 2594392.419 23°27'33.903" 68°48'11.826"
BP 10 479937.766 2594308.136 23°27'31.163" 68°48T2.837"
BP 11 480009.399 2594335.540 23°27'32.057" 68°48'15.361"
BP 12 480329.834 2594045.318 23°27'22.634" 68°48'26.669"
BP 13 480044.839 2593309.427 23°26'58.691" 68°48T6.659"
BP 14 479617.248 2593691.426 23°27'11.094" 68°48'1.57"
BP 15 479566.919 2593839.262 23°27'15.9" 68°47'59.789"
BP 16 479430.879 2593831.137 23°27'15.629" 68°47'54.994"
BP 17 479380.913 2593945.793 23°27'19.355" 68°47'53.227"
BP 18 479301.886 2593896.449 23°27'17.747" 68°47'50.444"
BP 19 479263.054 2593852.570 23°27'16.318" 68°47'49.078"
BP 20 479350.442 2593761.514 23°27'13.361" 68°47'52.162"
BP 21 479394.268 2593771.822 23°27'13.699" 68°47'53.706"
BP 22 479367.267 2593722.426 23°27'12.091" 68°47'52.757"
BP 23 479215.648 2593587.487 23°27'7.696" 68°47'47.42"
BP 24 478881.810 2593670.234 23°27'10.372" 68°47'35.649"
BP 25 478863.334 2593385.756 23°27T.12" 68°47'35.012"
BP 26 478894.852 2593279.139 23°26'57.654" 68°47'36.128"
BP 27 479046.016 2593187.428 23°26'54.679" 68°47'41.461"
BP 28 479061.235 2593143.883 23°26'53.264" 68°47'42"
BP 29 479027.938 2593103.665 23°26'51.954" 68°47'40.828"
BP 30 478699.197 2593018.456 23°26'49.168" 68°47'29.246"
BP 31 478737.937 2592980.439 23°26'47.934" 68°47'30.613"
BP 32 478832.022 2592937.585 23°26'46.545" 68°47'33.931"
BP 33 478621.924 2592943.946 23°26'46.742" 68°47'26.526"
BP 34 478595.351 2592913.484 23°26'45.75" 68°47'25.591"
BP 35 478467.216 2593033.060 23°26'49.632" 68°47'21.069"
BP 36 478512.695 2593047.145 23°26'50.092" 68°47'22.671"
BP 37 478538.930 2593109.280 23°26'52.114" 68°47'23.592"
BP 38 478756.630 2593155.740 23°26'53.635" 68°47'31.263"
BP 39 478833.780 2593196.488 23°26'54.964" 68°47'33.98"
BP 40 478807.237 2593294.278 23°26'58.143" 68°47'33.04"
BP 41 478691.089 2593303.225 23°26'58.428" 68°47'28.945"
BP 42 478561.050 2593260.495 23°26'57.032" 68°47'24.364"
BP 43 478513.086 2593486.345 23°27'4.374" 68°47'22.662"
Boundary Points Goyla - 2
Point Easting Northing Latitude Longitude
BP 01 478729.017 2591913.660 23°26'13.243" 68°47'30.353"
BP 02 479197.179 2591600.906 23°26'3.095" 68°47'46.868"
BP 03 479114.659 2591513.148 23°26'0.237" 68°47'43.964"
BP 04 479093.685 2591473.024 23°25'58.932" 68047'43.227"
BP 05 479114.967 2591436.369 23°25'57.741" 68°47'43.979"
BP 06 479134.234 2591380.445 23°25'55.923" 68°47'44.661"
BP 07 479171.607 2591359.655 23°25'55.249" 68°47'45.979"
BP 08 479213.937 2591270.866 23°25'52.363" 68°47'47.475"
BP 09 478492.304 2590994.855 23°25'43.354" 68°47'22.058"
BP 10 478416.342 2591321.017 23°25'53.957" 68°47'19.364"
BP 11 478428.650 2591435.317 23°25'57.674" 68°47'19.792"
BP 12 478742.183 2591738.190 23°26'7.538" 68°47'30.826"
BP 13 478740.888 2591814.507 23°26'10.02" 68°47'30.776"
BP 14 478714.620 2591940.027 23°26'14.1" 68°47'29.844"
BP 15 478667.835 2592129.725 23°26'20.267" 68°47'28.186"
BP 16 478468.263 2592071.141 23°26'18.352" 68°47'21.155"
BP 17 478393.000 2591988.000 23°26'15.645" 68°47'18.507"
BP 18 478375.183 2591982.309 23°26'15.459" 68°47'17.879"
BP 19 478249.993 2592223.627 23°26'23.3" 68°47'13.455"
BP 20 478069.525 2592624.783 23°26'36.337" 68°47'7.074"
BP 21 478636.263 2592815.396 23°26'42.562" 68°47'27.038"
BP 22 478827.058 2592801.592 23°26'42.122" 68°47'33.763"
BP 23 478913.661 2592570.748 23°26'34.62" 68°47'36.827"
BP 24 479009.094 2592423.072 23°26'29.822" 68°47'40.198"
BP 25 479062.629 2592543.422 23°26'33.738" 68o47'42.079"
BP 26 479177.846 2592515.515 23°26'32.836" 68047'46.141"
BP 27 479207.112 2592447.294 23°26'30.619" 68°47'47.176"
BP 28 479239.117 2592449.620 23°26'30.696" 68°47'48.304"
BP 29 479227.728 2592580.561 23°26'34.953" 68°47'47.896"
BP 30 479357.377 2592563.127 23°26'34.392" 68°47'52.466"
BP 31 479378.475 2592393.526 23°26'28.878" 68°47'53.218"
BP 32 479356.642 2592321.396 23°26'26.531" 68°47'52.452"
BP 33 479399.831 2592203.156 23°26'22.688" 68°47'53.98"
BP 34 479411.049 2592191.276 23°26'22.303" 68°47'54.376"
BP 35 479466.588 2592132.462 23°26'20.393" 68°47'56.336"
BP 36 479403.029 2592096.516 23°26'19.221" 68°47'54.098"
BP 37 479360.703 2592019.853 23°26'16.726" 68°47'52.61"
BP 38 479380.252 2592000.000 23°26'16.081" 68°47'53.3"
BP 39 479451.996 2591927.141 23°26'13.715" 68°47'55.832"
BP 40 479440.875 2591891.544 23°26'12.557" 68°47'55.442"
BP 41 479609.594 2591911.950 23°26'13.228" 68°48'1.387"
BP 42 479627.534 2591861.759 23°26'11.597" 68°48'2.022"
BP 43 479667.004 2591837.380 23°26'10.806" 68°48'3.414"
BP 44 479500.312 2591864.637 23°26'11.685" 68°47'57.538"
BP 45 479427.860 2591839.281 23°26'10.857" 68°47'54.986"
BP 46 479282.277 2591617.112 23°26'3.626" 68°47'49.866"
BP 45 479427.860 2591839.281 23°26'10.857" 68°47'54.986"
BP 46 479282.277 2591617.112 23°26'3.626" 68°47'49.866"
BP 47 479119.336 2592270.413 23°26'24.863" 68°47'44.091"
BP 48 479201.451 2592307.939 23°26'26.087" 68°47'46.983"
BP 49 479198.623 2592345.044 23°26'27.293" 68°47'46.882"
BP 50 479268.685 2592365.748 23°26'27.97" 68°47'49.35"
BP 51 479282.400 2592438.274 23°26'30.329" 68°47'49.83"
BP 52 479109.639 2592309.293 23°26'26.127" 68°47'43.747"
BP 53 479029.172 2592274.747 23°26'24.999" 68°47'40.913"
BP 54 478994.998 2592171.342 23°26'21.635" 68°47'39.714"
BP 55 478776.845 2591952.787 23°26'14.518" 68°47'32.036"
Accessibility
Nearest rail head Bhuj
Road State Highways and two lane metalled roads
connecting the block area with Ahmedhabad
via Bhuj.
Airport Rudra Mata Domestic Airport, Bhuj (100 km)
Port Kandla Port near Gandhidham (170 km)
Power Akrimota Thermal Power Project of GMDC at
Nani Chher Village in Lakhapat Taluka
Hydrography
Local drainage East/Southeast
Rivers
Climate
Average rainfall ( June-September) 100 mm
Temperature (winter - max and min) 350C and 80C
Temperature (summer - max and min) 400C and 220C
Topography
Toposheet Number 41 A/15 (F42C15 of Open Series)
Nature of surface Gently rolling terrain sloping towards southeast; Moderately elevated land near the
southwestarn boundary.
Cadastral Summary
Government Land 2.553 km2 area (~97%)
Private Land 0.066 km2 area (~3%)
Forest Area NIL
Exploration Summary
Regional geological mapping (agency, scale) Geological Survey of India; Scale - 1:500000
Regional exploration Agency (RRAS- 2009) Commissioner of Geology and Mining, Gujarat
Block exploration (agency) Gujarat Mineral Development Corporation
Number of drillholes 66
Total metereage 2884
Resource Summary (Mineral Evidence Rule)
Resource (UNFC categorisation, tonnage) 68 Mt
Average grade 47% CaO
Limestone thickness 12m Average
OB thickness 5 to 15m on average (35m max in SW)
Structure - strike and dip NE-SW/30 – 50 SE
Faults None
Figure 1: Location of Goyla Block Abadasa Taluka, Kachchh District of Gujarat shown above in the Google Earth image.
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Indicative Clearances – Goyla Block
Particulars Details/Status
1. Forest Clearance Provided by the Government of Gujarat. However, any
further action, if required, shall be the responsibility of the
Successful Bidder.
2. Revenue Clearance Provided by the Government of Gujarat. However, any
further action, if required, shall be the responsibility of the
Successful Bidder.
3. Environmental and Wild life clearance (sanctuary, reserve
or special zone clearances)
To be obtained by the Successful Bidder
4. Consent to establish To be obtained by the Successful Bidder
5. Mining Plan Approval To be obtained by the Successful Bidder
6. Permission for mine operation To be obtained by the Successful Bidder
7. Explosive License (if required) To be obtained by the Successful Bidder