Indian Minerals Yearbook 2016

Transcription

1 Indian Minerals Yearbook 2016 (Part- I : General Reviews) 55 th Edition STATE REVIEWS (Rajasthan) (ADVANCE RELEASE) GOVERNMENT OF INDIA MINISTRY OF MINES INDIAN BUREAU OF MINES Indira Bhavan, Civil Lines, NAGPUR PHONE/FAX NO. (0712) PBX : (0712) , , cme@ibm.gov.in Website: February,

2 RAJASTHAN Mineral Resources Rajasthan is the richest state in terms of availability and variety of minerals in the country and produces about 16 different minerals along with minor minerals. Rajasthan is the sole producer of lead & zinc ores, selenite and wollastonite. Rajasthan was the sole producer of garnet (gem) till Almost entire production of silver in the country comes from Rajasthan. The State is a major producer of copper ore/conc., limestone, phosphorite/rock phosphate and talc/soapstone/ steatite. The State is also an important producer of marble of various shades. Makrana area is the world famous centre for marble mining. The State possesses substantial share of the total resources of potash (94%), lead & zinc ore (89%), wollastonite (88%), silver ore (88%), gypsum (82%), ochre (81%), bentonite (75%), fuller's earth (74%), diatomite (72%), felspar (66%), marble (63%), asbestos (61%), copper ore (54%), calcite (50%), talc/steatite/soapstone (49%), ball clay (38%), rock phosphate (31%), fluorite (29%), and tungsten (27%). Important minerals that are found to occur in the State are: asbestos (amphibole) in Ajmer, Bhilwara, Dungarpur, Pali, Rajsamand & Udaipur districts; ball clay in Bikaner, Nagaur & Pali districts; barytes in Alwar, Bharatpur, Bhilwara, Bundi, Chittorgarh, Jalore, Pali, Rajsamand, Sikar & Udaipur districts; calcite in Ajmer, Alwar, Bhilwara, Jaipur, Jhunjhunu, Pali, Sikar, Sirohi & Udaipur districts; china clay in Ajmer, Barmer, Bharatpur, Bhilwara, Bikaner, Bundi, Chittorgarh, Dausa, Jaipur, Jaisalmer, Jhunjhunu, Kota, Nagaur, Pali, Sawai Madhopur & Udaipur districts; and copper in Khetri belt in Jhunjhunu district & Dariba in Alwar district. Deposits of copper are also reported at Ajmer, Bharatpur, Bhilwara, Bundi, Chittorgarh, Dausa, Dungarpur, Jaipur, Jhunjhunu, Pali, Rajsamand, Sikar, Sirohi and Udaipur districts. Occurrence of other minerals, namely, Dolomite in Ajmer, Alwar, Bhilwara, Chittorgarh, Dausa, Jaipur, Jaisalmer, Jhunjhunu, Jodhpur, Sikar & Udaipur districts; felspar in Ajmer, Alwar, Bhilwara, Jaipur, Pali, Rajsamand, Sikar, Tonk & Udaipur districts; fireclay in Alwar, Barmer, Bharatpur, Bhilwara, Bikaner, Dausa, Jaisalmer, Jhunjhunu & Sawai Madhopur districts; fluorspar in Ajmer, Dungarpur, Jalore, Jhunjhunu, Sikar, Sirohi & Udaipur districts; garnet in Ajmer, Bhilwara, Jhunjhunu, Sikar & Tonk districts; gypsum in Barmer, Bikaner, Churu, Sri Ganganagar, Hanumangarh, Jaisalmer, Jalore, Nagaur & Pali districts; iron ore (hematite) in Alwar, Dausa, Jaipur, Jhunjhunu, Sikar & Udaipur districts; iron ore (magnetite) in Bhilwara, Jhunjhunu & Sikar districts; lead-zinc in Zawar in Udaipur district, Bamnia Kalan, Rajpura-Dariba in Rajsamand & Rampura/Agucha in Bhilwara district. Lead-zinc occurrences have also been reported from Ajmer, Chittorgarh, Pali and Sirohi districts. Lignite deposits are found to occur in Barmer, Bikaner, Jaisalmer, Jalore, Nagaur and Pali districts. Flux grade limestone occurs in Jodhpur and Nagaur districts and chemical grade limestone in Jodhpur, Nagaur and Alwar districts. Cement grade deposits of limestone are widespread in Ajmer, Alwar, Banswara, Bhilwara, Bikaner, Bundi, Chittorgarh, Churu, Dungarpur, Jaipur, Jaisalmer, Jodhpur, Jhunjhunu, Kota, Nagaur, Pali, Sawai Madhopur, Sikar, Sirohi and Udaipur districts. Magnesite in Ajmer, Dungarpur, Pali & Udaipur districts; marble in Ajmer, Alwar, Banswara, Bhilwara, Bundi, Chittorgarh, Dungarpur, Jaipur, Nagaur, Sikar, Sirohi & Udaipur districts; mica in Ajmer & Bhilwara districts; ochre in Baran, Bharatpur, Bhilwara, Bikaner, Chittorgarh, Jaipur, Sawai Madhopur & Udaipur districts; pyrite in Sikar district; pyrophyllite in Alwar, Bhilwara, Jhunjhunu, Rajsamand & Udaipur districts; quartz/silica sand in Ajmer, Alwar, Bharatpur, Bhilwara, Bikaner, Bundi, Chittorgarh, Dausa, Jaipur, Jaisalmer, Jhunjhunu, Jodhpur, Kota, Pali, 11-2

3 Table 1: Reserves/Resources of Minerals as on : Rajasthan Reserves Remaining resources Total Mineral Unit Proved Probable Total Feasibility Pre-feasibility Measured Indicated Inferred Reconnaissance Total resources STD111 (A) STD211 STD331 STD332 STD333 STD334 (B) (A+B) STD121 STD122 STD221 STD222 Apatite tonne Asbestos tonne Ballclay # tonne Barytes # tonne Bauxite '000 tonnes Bentonite # # tonne Calcite # tonne China clay # '000 tonnes Copper Ore '000 tonnes Metal '000 tonnes Corundum tonne Diatomite # '000 tonnes Dolomite # '000 tonnes Feldspar # tonne Fire clay # '000 tonnes Fluorite tonne Fullers Earth ## tonne Garnet tonne Gold Ore (Primary) tonne Metal (Primary) tonne Granite # # (Dimen Stone) '000 cum Graphite tonne Gypsum # '000 tonnes Iron ore (Haematite) '000 tonnes Iron ore (Magnetite) '000 tonnes Kyanite tonne Laterite # '000 tonnes

4 Table - 1 (Concld.) Reserves Remaining resources Total Mineral Unit Proved Probable Total Feasibility Pre-feasibility Measured Indicated Inferred Reconnaissance Total resources STD111 (A) STD211 STD331 STD332 STD333 STD334 (B) (A+B) STD121 STD122 STD221 STD222 Lead-Zinc Ore '000 tonnes Lead metal '000 tonnes Zinc metal '000 tonnes Lead-Zinc metal '000 tonnes Limestone '000 tonnes Magnesite '000 tonnes Manganese ore '000 tonnes Marble ## '000 tonnes Mica # kg Ochre # tonne Potash million tonnes Pyrite '000 tonnes Pyrophyllite # tonne Quartzite # '000 tonnes Quartz- Silica sand # '000 tonnes Rock Phosphate tonne Sillimanite tonne Silver Ore onne Metal tonne Talc-Steatite- Soapstone # '000 tonnes Tungsten Ore tonne Contained WO 3 tonne Vermiculite tonne Wollastonite tonne Figures rounded off. Note: The proved and indicated balance recoverable reserves of crude oil and natural gas as on are million tonnes and billion cu m, respectively. # Declared as minor mineral vide Gazette notification dated ## Minor mineral before Gazette Notification dated

5 Rajsamand, Sawai Madhopur, Sikar, Sirohi, Tonk & Udaipur districts; quartzite in Ajmer, Alwar, Jhunjhunu & Sawai Madhopur districts; rock phosphate in Alwar, Banswara, Jaipur, Jaisalmer & Udaipur districts; talc/steatite/soapstone in Ajmer, Alwar, Banswara, Bharatpur, Bhilwara, Chittorgarh, Dausa, Dungarpur, Jaipur, Jhunjhunu, Karauli, Pali, Rajsamand, Sawai Madhopur, Sirohi, Tonk & Udaipur districts; vermiculite in Ajmer & Barmer districts; and wollastonite in Ajmer, Dungarpur, Pali, Sirohi & Udaipur districts. Other important minerals that occur in the State are: apatite in Udaipur & Sikar districts; bauxite in Kota district; bentonite in Barmer, Jaisalmer & Jhalawar districts; corundum in Tonk district; diatomite in Barmer & Jaisalmer districts; emerald in Ajmer & Rajsamand districts; fuller's earth in Barmer, Bikaner & Jodhpur districts; gold in Banswara, Bhilwara, Dausa, Sirohi and Udaipur districts; granite in Ajmer, Alwar, Banswara, Barmer, Bhilwara, Chittorgarh, Jaipur, Jaisalmer, Jalore, Jhunjhunu, Jodhpur, Pali, Rajsamand, Sawai Madhopur, Sikar, Sirohi, Tonk & Udaipur districts; graphite in Ajmer, Alwar & Banswara districts; kyanite and sillimanite in Udaipur district; manganese ore in Banswara, Jaipur, & Pali districts; potash in Jaisalmer & Nagaur districts; silver in Ajmer, Bhilwara, Jhunjhunu, Rajsamand, Sikar & Udaipur districts; and tungsten in Nagaur & Sirohi districts (Table - 1). District wise reserves/resources of lignite in the State are provided in Table-2. Deposits of petroleum are located in the Bikaner-Nagaur and Barmer-Sanchore basin and those of natural gas in Jodhpur and Jaisalmer basins in the State. Exploration & Development National Oil Companies (NOC) continued their seismic survey for petroleum and natural gas during The details of exploration activities conducted by various agencies GSI, MECL, HZL, State DMG, RSMML etc. for limestone, gold, base metals(cu,pb& Zn), lignite and other minerals including minor minerals during the year are furnished in Table - 3. Table 2: Reserves/resources of Lignite as on : Rajasthan (In million tonnes) District Proved Indicated Inferred Total Total Barmer Bikaner Jaisalmer & Barmer Jaisalmer & Bikaner Jalore Nagaur & Pali Jaisalmer Source: Coal Directory of India,

6 Table 3: Details of Exploration Activities in Rajasthan, Sampling Remarks GSI Base metal (Cu,Pb & Zn) Ajmer & Sandmata 1: Bhilwara complex 1: G-4 stage investigation of base metal & gold in this complex has been carried out by large-scale mapping, detailed mapping and pitting & trenching. The rock types exposed in the area are quartz-biotite gneisses/migmatite, granite gneiss, calc-gneisses, conglomerate, meta-greywacke, silicified dolomite, quartzite and pegmatite. Gneiss and migmatite with leticular patches of metasedimentary rocks are exposed from Hanutiya to Akarsada. The general strike of the area is NE-SW dipping on eithr side. Gritty conglomerate is the host rock of copper mineralisation. The surface indicates of mineralisation in the form of malachite staining, old mine pits and slag dump has been observed south of Hanutiya. Analytical results of 33 samples (BRS+soil) received so far have not showed any significant anomalous value of Cu. Alwar Agar 1: trench Block samples Thanagazi Tehsil G-4 stage investigation for copper & associated precious metals by large scale mapping has been carried out. A mineralised zone with a strike length of about 1200 m has been delineated. The mineralised zone has an exposed strike length of 350 m within the quartzite hill along a fault zone with presence of old workings and numerous vertical shafts. In order to check the potential for mineralisation, four trenches were laid across the strike of the zone. The trench samples collected from trench AGTH-2 have analysed anomalous concentration of copper, Nineteen out of 29 samples have given a copper value more than 0.2% with maximum value up to 0.55%. Another grab sample collected from the mineralised zone from a well dump has given copper value of 2.53% and gold value of 300 ppb. The grab sample collected from the dumps near an old working at the quartzite hill has given a value of 0.58%. The slag samples analysed from the slag heaps have 0.26% to 0.49% of Cu. Based on the analytical data received so far, the area seems to be potential for copper mineralisation. 11-6

7 Table 3 Alwar Angari 1: block Thanagazi Tehsil G4 stage investigation was carried out. On the basis of surface indications i.e., presence of old workings, malachite stains and fresh sulphides, two mineralised zones have been delineated. The two zones are present in the west-central part of the block; one in banded dolomitic marble and the other is in tremolite-bearing banded dolomitic marble with quartz and carbonate veins. Within the banded dolomitic marble pyrrhotite and arsenopyrite are present as disseminations and along foliation planes. Highly gossanised rock of tremolite-bearing dolomitic marble is observed in two dug wells further north of the Angari block. Stromatolitic structures are identified in dolomitic marble at two places, tested for phosphate with Shapiro solution, which indicate presence of phosphate. Bedrock samples from west-central part of the area contain 0.17% Cu. Samples collected from the northern part of the block analysed 450 ppm Zn. The analytical results of samples from ferruginised brecciated zone at the eastern side of the block shows 0.24% Zn, 800 ppm Cu and 600 ppm Ni. Mundiyawas Khera area (Khera main block) G2 stage investigation for copper and associated precious metals in this block has been carried out. The rock types exposed are interbanded sequence of felsic volcanic(tuff), cherty quartzite, bands of scapolite-biotite rock, tremolitebearing dolomitic marble & carbon phyllite. All the boreholes intersected host rock felsic metavolcanics and dolomitic marble having significant sulphide mineralisation. The sulphides are in form of occasional foliationparallel specks, stringers, fracture and vein-filled chalcopyrite and pyrrhotite. 11-7

8 Table 3 Alwar Mundiyawas Khera area SE Block Alwar and Tehla-Khoh- 1: Jaipur Bighota area G-3 stage exploration for copper and associated precious metals by deep drilling has been carried out. The borehole intersected significant sulphide mineralisation between m m m with Cu(V.E.) = %, 233.0m m =18.0m with Cu (V.E.)= %, m m =21.15 m with Cu (V.E.)= %, m m with Cu(V.E.)= %, m m=7.0 m with Cu(V.E.)= % and m m=5.0 m with Cu (V.E.)= %. G-4 stage investigation for base metals and associated precious metals by large scale mapping has been carried out in Rup Bas-Talab-Losal- Ladlaka-Guwara-Kataraka-Guwara- Govardhanpura-Rampura-Kundla- Ramsinghpura-Bighota area. The first boreholes PBH-1 to the west of Palpur block intersected sulphides in the form of pyrite, pyrrhotite and specks of chalcopyrite at 6-75 m depth. Significant dissemination of chalcopyrite along with pyrite and pyrrhotite were observed at m depth. The second borehole in Bighota area WBBH-2 has intersected sulphide mineralisation at m within bluish coloured quartzite and at m within actinolite/tremolite-bearing dolomite marble. Besides, fracture filling of metabasic rock by pyrrhotite and chalcopyrite at m, m, and at m has been observed. The third borehole PBH-3 to the west of Palpur block intersected sulphide mineralisation. Three major lithounits viz. amphibole marble, biotite schist and metabasic rock are intersected in the borehole. Along the borehole dissemination of chalcopyrite, pyrite, pyrrhotite besides fracture-filling were observed at m within amphibole marble, at m within biotite schist at m within amphibole marble, at m within metabasic rock, a m within amphibole marble, at m within metabasic rock at m within amphibole marble, at m and m within metabasic rock. 11-8

9 Table 3 Jhunjhunu Bokri and Malwali prospects of the Eastern Khetri Sikar Kharagbijpur (South-east) 1: BRS 100 channel samples G-3 stage investigation for copper and associated mineralisation has been carried out by detailed mapping & on that basis two sub-parallel mineralisation zones were established, one within the fault zone breccia and other in silicified quartzite. The lithologies encountered are quartzofeldspathic mica schist + garnet and albitite, chlorite-biotite schist+ garnet and epidote, graphite schist and calc-silicate rock. Graphite schist and the calc-silicate rock host sulphide mineralisation. All the boreholes have intersected the sulphide mineralisation in the form of dissemination and streaks with occasional stringers, veins and fracture-filling of chalcopyrite, pyrite, pyrrhotite and specularite. The analytical data indicated two copper zones (3.5 m x 0.32% Cu, 6 m x 0.4% Cu) in the first borehole. G-4 stage investigation has been carried out by datailed mapping. The area exposes dolomitic marble and biotite rich dolomite bands. Mineralisaton is in the form of chalcopyrite and bornite specks which is observed along thin veins of quartz and calcite. Several thin (few centimetres to 0.5 m wide), pink-coloured pegmatite veins are observed along foliation planes and have been mapped. The thicker quartz veins are mostly emplaced along S3 foliation plane but do not show any evidence of copper mineralisation. Bedrock samples collected along the baseline for a distance of 600 m were analysed for copper which varies from 0.58% to 0.14%. On the basis of chemical analysis of BRS, about 600m long surface mineralised zone has been demarcated in the biotite dolomitic marble unit and four channels have been cut across it at an interval of 200 m and 100 channel samples have been collected. The exact thickness of the mineralised zone will be ascertained after the results of chemical analysis of channel samples are received. 11-9

10 Table 3 Sikar Southern 1: extension of Nanagwas block G-3 stage investigation by detailed mapping has been carried out to delineate southern extension of the mineralised zone. The current mapping and detailed surface geochemical evaluation not only helped in tracing the southern extension of the main mineralised zone exposed in Nanagwas main block but also helped in delineating an additional mineralised zone in the eastern part of the block for a strike length of about 1550 m. The drilling in the western zone established strike continuation up to 800 m. Similarly, four boreholes drilled in the newly delineated eastern zone established subsurface continuation of mineralisation at least for 800 m, though surface extension has been established for a strike length of 1550 m. The remaining portion of the zone will be established subsequently in relation to the subsurface continuation of mineralisation. Core sampling and detailed logging suggests a bornite-dominated copper mineralisation in association with chalcopyrite, covellite, specularite, pyrrhotite and pyrite. Mineralisation is mostly present in the form of stringers, vein-fillings, streaks, specks of above sulphides/ oxides, predominantly hosted within biotite-bearing dolomitic and calc-quartz-biotite schist. The mineralised zone intersected in various boreholes at a vertical depth of m and has a thickness varying between 12 m-18 m along the borehole. Visual estimate of the sulphides and copper content indicates copper values ranging from 0.1% to 0.3% Cu

11 Table 3 STATE REVIEWS Sikar West of Nanagwas block Kishanpura 1: Loharwas G-2 stage investigation has been carried out in this block which is one of the most significant explored blocks in Neem Ka Thana copper belt. The block having 2 km strike length which has contributed MT x 0.33% Cu by cross-section method at 0.2% cut off. Drilling includes first, second, third, and fourth level boreholes. Copper mineralisation is in the form of vein-filling, stringers and dissemination of bornite (dominantly) and chalcopyrite. G4 stage preliminary investigation has been carried out to evaluate the potential of basemetal & RM and REE mineralisation. The surface evidence of basemetal mineralisation is marked by the presence of malachite stains, fresh sulphides i.e. chalcopyrite, pyrite, bornite and specularite occurring along the quartz/carbonate veins. The above mineralisation is hosted by calc-silicate rock and amphibole bearing marble. Based on the above evidences a mineralised zone, about 1 km long and m wide, has been delineated on surface and 71 bedrock samples on grid pattern (100 x 25 m) have been collected and analysed. Three channels have been put across a mineralised zone at spacing of 200 m. From channel RCH-1, 13 samples have been collected which analysed copper varying from 10 ppm to 4400 ppm. Eight samples from channel RCH-2 have been analysed for copper which varies between 90 ppm and 240 ppm and copper content in 5 samples collected from channel RCH-3 varies between 60 ppm and 170 ppm. As most of the study area is occupied by pegmatite body, a total of 135 samples have been collected from different pegmatite bodies for REE & RM mineralisation. Out of 135 samples analysed, results of 5 samples have been received which do not show any encouraging results for REE & RM mineralisation

12 Table 3 Sikar Pachlagi- 1: BRS Narsinghpuri & surrounding area Udaipur Devimata- 1: BRS Pipaldaran 52 pit area samples A G-4 stage investigation for searching basemetal alonwith molybdenum mineralisation has been carried out by large scale mapping. On the basis of surface indications and the presence of old workings (for fluorite, Salwari area, where intense malachite/azurite stains occur), the area holds good promise for basemetal mineralisation. Also east of Guhala the magnetitebearing brecciated albitite which contains sulphides has been marked as a mineralised zone extending for approximately 600 m with 5 to 10 m width. Salwari and Guhala areas hold good poentiality. So far analytical results of only 17 BRS have been received. Cu content varies from 10 ppm to 2.1%. Three disposed core samples of AMD have been analysed and one sample reveals the presence of 201 ppm of molybdenite. The analytical results of 55 BRS are awaited. G-4 stage investigation for copper and associated mineralisation has been carried out by large scale mapping. The major lithounits identified and mapped are phyllite, dolomite, quartzite, metagrey-wacke, calcite marble, polymictic conglomerate, intrusive granite and mafic rocks belonging to Paleoproterozoic Aravalli Supergroup. Surface indication of copper mineralisation is recorded in the form of old working pits, slag heaps, profuse malachite encrustation associated with azurite, zone of oxidation and gossanisation. Fresh sulphides viz. pyrite and chalcopyrite are hosted in dolomite, sheared phyllite and interface of granite and cover sequences. Several old workings hitherto unknown in the north of Chandni, south of Kala Magra and Kevda Kalan area were also mapped. These old workings are at the interface of intrusive granite and cover sequences. Bedrock samples and mine dump samples collected from the old workings have shown Cu values varying from 350 ppm to 1.53%, Pb values between 90 ppm and 510 ppm and Zn values between 150 ppm and 0.20%

13 Table 3 STATE REVIEWS Glauconite SawaiMadhopur Bapoti, 1: and Karauli Kanotipura village G-4 stage preliminary search for potash in gluconite sandstone/shale has been carried out by mapping. As part of surface exploration, 403 bedrock samples were collected, including 80 pitting/trenching samples. A total length of 300 m has been drilled in scout boreholes. A total of 255 core samples were processed for chemical analysis. 37 rock samples representing different litho units in the area were collected for petrographic study. A total of 5 rock/mineral samples were also collected and submitted for XRD analysis. The detached band of glauconitic sandstone is recorded near Mahuali. It varies in thickness from 1 m to 2 m and exends over a strike length of 2 km. The olive-green Panna shale is glauconitic in nature. The maximum content of K 2 O in olive green shale is 5.65% near Bapoti and 4.95% near Kanotipura village. The maximum value of K 2 O analysed in Taragarh sandstone is 3%. The youngest formation in the study area is Maihar Sandstone, very limited exposures intercalated with glauconitic sandstone; lie in NE part of the study area near Mahauli, Kharsai, Rajor and Atwewa areas. The thickness of glauconitic level varies from 0.01 m to 1m. Petrological study indicates that glauconite mineralisation in Panna Shale and Jhiri Shale is of disseminated type and is very fine in nature. In sandstone of Taragarh and Maihar formation glauconite mineralisation is in the form of thin lenses and is coarse in nature. The analytical result of 33 bedrock samples indicates that maximum concentration of potash in olive- green shale of Panna and Jhiri formation is 5.65% and 5.81%, respectively. On the basis of exploration data, broadly, four potential zones have been demarcated. (i) Olive-green shale of Jhiri Formation having strike continuity of about 12 km from Adadungar to Ramapura Ghati, (ii) Olive-green shale of Jhiri Formation

14 Table 3 STATE REVIEWS Gold Banswara Makanpura 1: area G-4 investigation for gold and associated mineralisation in Makanpura area was carried out. Surface indications of mineralisation are seen in the form of old workings, gossan/ ferruginisation, malachite staining and silicification. Four mineralised zones (MZ-I to MZ-IV) have been delineated on the basis of surface evidences from east to west, which vary in length from 100 m to 280 m and in width from 4 m to 20 m. Eleven channels are laid across these mineralised zones. Mineralisation in the area is mainly present within grey carbon phyllite, massive marble, metabasic rock and chlorite phyllite. Study of the borehole cores shows that primary sulphides occur mainly in carbon phyllite, metabasics, massive marble and chlorite phyllite. The sulphide mineral assemblage is represented by pyrrhotite, pyrite and chalcopyrite in order of decreasing abundance. These minerals occur as dissemination, vein, stringers and veinlets. The width of sulphide zones along boreholes varies from 3.00 m to m and visual estimate of sulphides ranges from 5 to 10%. Analytical results of basemetals pertaining to borehole MPH-1 indicate 0.20% cut-off grade of copper zone (6.65 m thick) with 1.14% Cu (average). Analytical results of some of the channel samples received so far also indicate anomalous values of copper and zinc

15 Table 3 STATE REVIEWS Dungaripara Nawa Khera area G-4 investigation for gold and associated mineralisation was carried out. A total of 27 cu m of pitting/ trenching has also been carried out. Surface evidences of mineralisation includes presence of gossan zones, old workings, malachite stains, epidotisation, feldspathisation and silicification. Five gossan zones have been identified and demarcated in mapped area: 1. Gossan at the contact of phyllite and grey dolomite marble near Undwala village, approximately 600 m long and 20 m wide. 2. Gossan/ferruginised-silicified zone in phyllite/dolomitic marble. 3. Gossan developed at the contact of amphibole marble and bluish grey phyllite, south of Padi-Khera village, which is approximately 250 m long and m wide. 4. Ferruginisation/gossanisation at the contact of grey banded marble and bluish grey phyllite near Sadri village which is approximately 200 m in length and 20 m in wide. 5. Gossan in bluish grey banded phyllite near Padi-ka-Khera village approximately 150 m in length and 20 m in width. Mineralisation has been recorded near Kundli village in ferruginised quartz vein having specks of chalcopyrite and pyrite. A small zone of mineralisation (chalcopyrite along with malachite stain) and alteration in the form of epidotisation and feldspathisation has been observed in the banded quartz amphibole rock near Dharma village over a strike length of 10 m and width of 2 m

16 Table 3 STATE REVIEWS Anomalous values of REE varying from 829 to 1979 ppm have been recorded in 6 samples from granite exposed near Miyasa, Murasel and Goj areas. Analysis of pyrite- bearing grey quartzite to the west of Dolipada recorded Zn content of about 784 ppm. Analysis of two channel samples and five grab samples collected from a 500 m long and 25 m wide gossan zone exposed near Dolipada village recorded zinc and lead, whose concentration range from 210 ppm to 0.75% and 100 ppm to 0.19%, respectively. Pratapgarh Mahuri Khera block G-3 stage investigation for gold and associated basemetal mineralisation was carried out. Exploration of goldcopper mineralisation by drilling in Mahuri Khera area was taken up based on encouraging gold and copper values in channel samples collected from the area during During , four boreholes were drilled to test the depth continuity of 800 m long mineralised zone (MZ-I). Surface evidences of mineralisation are in the form of gossan, ferruginisation, silicification, wall-rock alteration, old workings and malachite/azurite staining. Indication of mineralisation is also seen in the form of intense silicification and hydrothermal alteration. Fresh sulphides in the form of pyrite and chalcopyrite are recorded in dolomitic marble and tourmaline bands. Based on these surface indications, seven mineralised zones have been identified. The sulphide zones (1.10 m to 9 m) are recorded mainly in the altered dolomitic marble and massive dolomitic marble with sparsely spaced alteration veins. The main sulphide minerals are pyrite, pyrrhotite, chalcopyrite and arsenopyrite in decreasing order of abundance. The sulphide minerals are, in general, medium to fine grained and occurs as fine dissemination, veins, veinlets, stringers and smears. Analytical results of core samples received so far have revealed the presence of 4.25m thickness zone with 0.26 % average copper content

17 Table 3 STATE REVIEWS Lignite Jaisalmer & Palana area Bikaner Limestone Jaisalmer Minyun ki Dhani (Main Block) G-4 stage investigation has been carried out by scoat drilling in charanwala north area for search of lignite. Sixteen boreholes of cumulative length 4, m have been drilled. Lignite seams have been intersected in the central and western parts of the area. Thickness of individual lignite seams varied from 0.10 m to 3.50 m in the depth range of m to m. The lignite seam is hosted within the Lower Tertiary Palana Formation. G-2 level exploration was carried out in the area during the year The area covers north western part of Jaisalmer basin which comprises a thick pile of sediments ranging from continental deposit of Lathi formation of lower Jurassic age (Lias) to Shumar Formation of Quaternary age with intervening sequence of Mesozoic-Tertiary rocks. The area in general is structurally undisturbed with mostly subhorizontal to horizontal beds.tertiary limestone, popularly known as Khuiala Limestone occurs in the form of a sickle shaped exposure covering more than 900 sq.km. area. It has been assessed largely as chemical /SMS grade. About 60% area is covered by the recent alluvium or blown sand. The fragmentary ironstone belonging to Shumar formation of Quaternary age is developed in the north eastern part of the area. Marl, calcrete/pebbles spread is also observed in the area. Small exposures of light pink to pinkish white, hard and massive nodular limestone were recorded in the southern part of the area. All the 50 boreholes have intersected both hard and compact limestone which is expected to be of SMS grade and impure limestone which is expected to be of cement grade. Hard and compact limestone has been encountered in the form of bands in the impure limestone, whose thickness varies from 1 m to 16 m along borehole. Thin bands of gypseous clay have been recorded in the boreholes located in the northern parts of the area. After receiving analysis data for all the core samples, nearly 5% of samples will be selected from all the boreholes for decrepitation test

18 Table 3 Jaisalmer Minyun ki 1: Dhani (North) Jiraj Ka 1: Toba-Asu Tar (southeast) Block Detailed mapping at G-3 level exploration has been carried out during the year The area forms flat topography with isolated exposures of bioclastic limestone, clayey foraminiferal limestone, fullers earth and ironstone fragments. Ironstone fragments are mainly present on top of foraminiferal limestone as capping and as pebble spread at other places. The beds are horizontal to subhorizontal. Selenite variety of gypsum is also observed at few places on the surface as well as in borehole intersection. Visually it is interpreted that about 20% of limestone intersected will be SMS (LD) grade. 1 to 2 bands of hard and compact limestone and impure clayey limestone and chalky limestone have been intersected in different boreholes. Thickness of limestone band intersected in different boreholes varies from 25 m to 40 m and limestone was intersected from 2 m below ground level to a depth of 50 m below ground level. Analytical results are awaited. Detailed mapping with G-3 level exploration has been carried out during the year The main lithounits recorded are hard foraminiferal limestone, fragmentary iron stone and gritty sandstone. The beds are horizontal to sub horizontal. The western part of the area is mostly covered with NE-SW to NNE-SSW trending sand dunes. Rocks intersected in boreholes are sub bentonitic clays, impure clayey limestone, gritty limestone, hard and compact limestone, fragmentary ironstone and blown sand in an ascending order. Visually it is interpreted that about 40%-50% of limestone intersected will be of SMS (LD) grade. 2 to 4 bands of hard and compact limestone and impure clayey limestone have been intersected in different boreholes. Thickness of limestone band intersected in different boreholes varies from 15 m to 29 m and limestone is intersected from 0.50 m to a depth of m below ground level. Analytical results are awaited

19 Table 3 Large-scale mapping in the Mangliyawas-Makrera block was done. Analytical results of 30 samples (BRS) have been received so far, out of which 14 samples show Ni values ranging from 541 ppm to 0.18% and Cr values ranging from 130 ppm to 0.21%. The analytical results of PGE of all the samples are awaited. Udaipur Rikhabdev 1: ultramafic rocks Dhelana area) Phosphorite Banswara Sallopat block 1: ultramafic 1: Chemical rocks Nickle Ajmer Mangliawas- 1: Makrera-Rajgarh- Bedrock Lachhipura- 25 Hatundi petrochemical (Kherwara- (Kherwara- Dhelana area) The ultramafic rocks are highly altered and comprise predominantly of serpentinites. These occur as large irregular lensoid bodies (Kherwara- Dhelana area) and lenticular bands more than 5 km long and are generally emplaced along lithological contacts within the Aravalli Supergroup. Analytical results received so far indicate that Ni values range from 500 ppm to 0.22% and Cr values range from 450 ppm to 0.44% in serpentinite. The analysis of PGE is awaited. The important litho units noticed during detailed mapping are stromatolitic dolomite (phosphatic)/ dolomite, chert, quartzite and calcareous sandstone (slightly phosphatic). Stromatolites of columnar, bedded, laminated, fragmentary and brecciated types are noticed. Stromatolite bearing dolomite occurs as lensoidal bodies of varying dimensions (50 m to 350 m). Mainly two generations of dolomite have been noticed in the Sallopat area - the older grey to bluish grey dolomite is mainly stromatolite-bearing (phosphatic) and it is capped by younger generations of barren dolomite. A fresh zone of stromatolite-bearing dolomite of about 10 to 15 m is exposed in Khunda Galla area in the NW extension of Sallopat Block. A 1.5 km long stromatolite-bearing dolomite has been traced in Sallopat area with a width of about 50 to 600 m, which is noticed on either side of Pat nala. Stromatolitic zones are also noticed in Shivpura, Jher Moti, Ram Ka Munna and Rola areas. The important lithounits intersected in boreholes are bluish grey stromatolitic dolomite (phosphatic), grey to greyish white

20 Table 3 REE/RM Jhunjhunu Gothara 1: HZL (Vedanta) All mines , & sites dolomite (slightly phosphatic), pinkish dolomite, chert/cherty quartzite and quartz veins. In general, the stromatolite-bearing dolomite is intersected at a depth of m. Mostly bluish grey stromatolitic dolomite is phosphatic in nature. G-4 investiagion of REE in Gothara Granite of Khetri Fold Belt, Jhunjhunu district, Rajasthan. During the present FS a total of 0.6 sq km detailed mapping on 1:2000 scale has been completed in Rajota Block. The main lithologies mapped are biotite schist, phyllite, quartzite, granite, metadolerite dykes, pegmatitic quartz and quartz veins. The schist is mainly of two varieties viz. biotite schist and quartz-sericite-biotite schist. The quartzite is mainly of two types viz. ferruginous quartzite and amphibole-magnetitebearing quartzite. In the southern part of the mapped area at the contact of quartzite and schist, quartz-pebble conglomerate is present. The Gothara Granite body is inhomogeneous and shows two variations viz. fine-to medium-grained granite and porphyritic granite. In the south eastern part of the study area the granite is silicified in nature. Three amphibolite dykes have been mapped in Rajota area crosscutting the metasedimentary units. A number of later quatz veins are also present in the area. Two fault zones trending NE-SW evidenced by brecciation, silicification and carbonatization in the metasediments are also present. Old workings and indications of sulphide mineralization (malachite staining, limonitic and sulphide grains) are observed in quartzites and quartz veins. In Gothara Granite central block 9, vertical boreholes of 50 to 60 m length were drilled. The entire length of the boreholes is sampled. The analytical results of core samples are awaited. Objective of exploration was to delineate the shape of ore body & grade tonnage estimation. The brownfield drilling added gross reserves & resources of 25.3 million tonnes during the year, augmenting the overall R & R to million tonnes as on 31 st March, This contains million tonnes of zinc metal, 8.67 million tonnes of lead metal and grading 7.0% zinc, 2.2% lead and 80.3 g/t silver

21 Table 3 DEPARTMENT OF MINES & GELOGY Base Metal Jaipur Near village 1: Chenpura, (25 channel Tehsil Bassi samples spot samples) Geologicallly, the rock types of the area covered are Brecciated Ferruginous Quartzite (BFQ) interbedded with Quartzo- Phyllite, Brecciated quartzite and Dolomitic Limestone belonging to Ajabhgarh Group of Delhi Supergroup intruded by amphibolites and quartz veins of post Delhi Age. A zone of 250 x 100 mts has been delineated, where there are six old workings in which ferruginous material mainly goethitic/hematitic in nature was observed in quartzite. Botryoidal structure is visible at several places in hematite. Banded hematite quartzite is also obsrved at places. Results of chemical analysis are awaited. Further work will be proposed subject to assessment by chemical analysis. Jhunjhunu Near village 1: Bankoti, Rasulpur, 1: Modki, (RGM) (spot Tal Ki samples) Dhani, 1:4000 Madhogarh tehsil Khetri detailed geological mapping) Geologicallly, the area comprises of Quartzite, Phyllite, Mica-Schist, etc. belonging to Ajabgarh Group of Delhi Supergroup intruded by Amphibolites and Quartz veins of Post-Delhi age. Surface indications of Copper in the form of Malachite, Azurite staining was observed in Madhogarh-Padeva block (associated with schist and quartzite). The two other such zones were observed around Madhogarh-Guninicha block and Kalota-Mandana block. China clay Bikaner Motawatan, Kishnayat area Taluka: Kolayat Objective of exploration was to locate and map clay, silica sand areas out side the leased out area. Geologically the large area of District Bikaner consists of Tertiary formations. In Kolayat, large area is being excavated for production of ballclay. Exploration work includes regional mineral survey & regional geological mapping over an area of 270 sq. km and 20 sq. km, respectively

22 Table 3 Dolomite Rajsamand Lalmadri, Karauli 1: Semal in 1: Nathdwara tehsil - Tonk Khalipura, Dadwari, 1: Davri, jabriya, etc. 1: Granite Barmer N/v Nand, 1: Shiv Ki Magri, 1: Malba, jhari, etc. 1: Teh. Shieo Chittorgarh N/v Rajiyas, 1: Chawandiya, 1: Mohan Ka Khera, 1: Teh. Gangrar Granite is pinkish-brown to creamish in colour, medium grained and is exposed in the form of hillocks and flat outcrops. Reserves/Resources were not estimated. Total 15 plots of 3 ha each were delineated. Reserves/Resources were not estimated. Jalore N/v Korana, 1: Teh. Jalore Reserves/Resources were not estimated. Granite is blockable. Rajsamand N/v Chikalwas, 1: Sayon Ka Khera, etc. 1: Teh. Nathdwar Granite is medium to coarse grained, porphyritic gneissic granular & grey in colour. Sirohi N/v Nagani, 1: Idarla Jirawal, 1: Amarapura, etc. 1: Teh. Reodar Iron ore Alwar Shyampura, Mejorh Raipura, Ramjikaguda, Balwas etc. Granite is greyish white in colour. 4 plots were chalked out. Reserves/Resources were not estimated. Regional Mineral Survey conducted for Iron ore, Red/ Yellow ochre,quartz and other economic minerals. Bhilwara N/v Undwa 1:10, Ojhara 1:4, Bhakaliya 1:10, Chandgarh Regional Mineral Survey conducted for clay, Red ochre, Iron ore, blockable granite and other economic minerals near village Ojhara, Hamirgarh, Renwas, Barliyas tehsil Hamigarh & Kotri, district Bhilwara. Jiwakhera 1:10, Hamirgarh

23 Table 3 District (sq km) borehole Laterite Pratapgarh Rathajna, 1: Gadola, 1: Khariya, 1: Bhuwasiya, Panmori, etc. The area is occupied by basaltic flows. Weathering of basalt at places has resulted in formation of laterite cappings of varying thickness ranging from 0.5 m to 3 m. Laterite is covered by red ochre and red soil formed due to weathering and erosion. Laterite is pisolitic, porous, red and brown in colour. No further exploration work was proposed. Baran Shahbad (RMS) (RGM) 15 (DGM) 1.5 Two small mounds of laterite are also found in the south-east of Majhola falling in forest land. Lignite Bikaner Diyatra village million tonnes of resources. Gap area between Ambasar, Barsinghsar, Halda Limestone Ajmer Shyamgarh 1:10000 (RGM) Pakriyawas 1:2000 (DGM) 3 Kanakheda, Kesarpura Teh. Beawar Geologically, the area comprises calc gneisses, calc, silicate, limestone, quartzite, mica schist of Kumbhalgarh group of Delhi Super group alongwith intrusive of granites, pegmatitite and vein quartz etc. General strike of rock formation in NNE-SSW with 70 o to 80 o due westerly dips. 12 parallel limestone bands measuring about 780x55-60 m, 900x45-65 m, 1250x40-50 m, 1000x m, 550x75-80 m, 780x m, 800x45-60 m,1900x25-60 m, 1150x55-60 m,1900x m, 2100x m were mapped from Village Kesarpura in the north to Village Karwai in the south

24 Table 3 (Concld.) District (sq km) borehole Border of Pilwa 1:50000 (RMS) Ajmer and Chinwali and 1:10000 (RGM) 15 Nagaur Dhandata 1:2000 (DGM) 2 Alwar N/v Bithloda DGM & Jaipur Mandha, Bhakri Karoi, Nayabas etc. Geologically, rocks of the area belong to Ajabgarh group of Delhi Supergroup along with intrusives Phulad ophiolite suite, sendra Ambaji synorogenic granite and Erinpura granite. Rock types encountered in the area are mica schist, qartzite, conglomerate, limestone,dolomite,dolomitic limestone calc-silicate granite, amphibolite, pegmatite and vein quartz. General trend of rock formations is NE-SW with 50 O to 70 o dips due west. Two dolomitic limestone bands measuring 780x m and 500 m x m (highly ferruginous) were mapped N/v Mehgaon. The proposed explored block comprises of limestone, calc, silicate, Phyllite, Schist etc. Rocks belonging to Ajabgarh group of Delhi supergroup intruded by quartz, pegmatite of post Delhi age. Tentatively, about 51 million tonnes indicated resource and 23 million tonnes inferred resources of limestone have been estimated in both Bhaisalana and Kujota blocks up to Bundi Kathoda,Mani RMS Bishan Pura RGM 15 Kalyani, DGM 1.5 Karwar Ariali, Antarda etc. Topographically, the area is occupied by hills N/v Antarda, Jhira, Bud, Karwar, Ghati and Kishanpura and rest of the area is occupied by plains and agriculture fields. Geologically, the area comprises phyllite, shale sandstone and quartzite. It belongs to Hindoli group of Bhilwara supergroup. Greenish and chocolate brown coloured, hard, thinly bedded shales are exposed in plain and nalah cuttings below thick soil cover. Chittorgarh Rasulpura, Bansa & Pirkhera Phachar Ahiran Tehsil-Nimbahera Geologically, the area comprises Nimbahera limestone and shales of khorip group of lower Vindhyans belonging to proterozoic era. These are trending in N-S with 10 0 to 25 0 rolling dips. These conformably lies over Binota shale and underlained by Nimbahera limestone

25 Table 3 District (sq km) borehole Dungarpur Rama,Dad 1:50000 (RMS) (spot Munger 1:10000(RGM) 10 sample) Bhatoli 1: (RGM) Tehsil, (Core Aspur & Sabla sample) Jaisalmer N/v Sam 1:50000(RMS) :10000 (RGM) 15 1:2000 (DGM) 4 Geologically, the area comprises phyllite, mica schist of Balicha formation and Crystalline limestone of Banswara formation belonging to Udaipur Group of Aravalli Supergroup with general litho trend N-NW to S-SE with almost vertical dip. The light grey to pinkish coloured, fine grey to medium grained, hard and compact, bedded granite/amphibole gneiss other east extending for about 5 km strike length with m width N/v Sabla-Tapra, Bhatoli to Mahi river. Another band of 500 m length & m width dimension also mapped parallel existed on the west of it & SW of Sabla hill. Lithologically, the limestone band is trending N-NW to S-SE with almost vertical dips, at places showing 5 0 to 10 0 variation on either sides. Area comprises an outcrops of hard compact bouldary limestone underlain by chalky limestone of Khuiala formation and overlain by pseudoconglomeratic ironstone of shumar formation with sand. The limestone is horizontally disposed. It is cream pinkish to whitish in colour, hard and compact, chalky & fossiliferous in nature million tonnes cement grade limestone and million tonnes SMS grade limestone were estimated. N/V 1:50000 (RMS) Jajiya 1:10000 (RGM) 10 1:2000 (DGM) 3 Jhalawar Pirawa, Pach-Pachar RMS Gangadhar,A Klera RGM 15 Manoparthana and DGM 1.5 Khanpur Area comprises outcrops & escarpment of yellowish fossiliferous limestone of Jaisalmer formation trending N-S direction. The yellow limestone is horizontal to subhorizontal dip towards NW/W. About 1.0 sq.km. potential area of yellow fossiliferous limestone suitable for dimensional stone having thickness from 0.50 m to 2.0 m have been located near village Mayajal. Topographically, the area is occupied by plains and mounds. Gcologically, the area comprises Deccan Traps (Basalt). The basalt is greyish to blackish in colour, hard, weathered and fractured in nature