jhak murkasni final report
TRANSCRIPT
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.