STATE REVIEWS

Indian Minerals Yearbook 2018

(Part- I)

57th Edition

STATE REVIEWS ()

(FINAL RELEASE)

GOVERNMENT OF MINISTRY OF MINES INDIAN BUREAU OF MINES

Indira Bhavan, Civil Lines, NAGPUR – 440 001

PHONE/FAX NO. (0712) 2565471 PBX : (0712) 2562649, 2560544, 2560648 E-MAIL : [email protected] Website: www.ibm.gov.in

November, 2019

11-1 STATE REVIEWS SIKKIM Production No mineral production (except minor minerals) Mineral Resources was reported in 2017-18. The value of minor miner- als production was estimated at ` 188 lakh for the The important mineral resources of the year 2017-18. State are copper-lead-zinc and silver, reported Mineral-based Industry in Bhotang, and Dikchu in East Sikkim districts. Occurrences of other minerals SMC, a joint venture of Government of reported in the State include dolomite, quartzite and Sikkim and Government of India was established for the purpose of development of Bhotang polymetallic talc/steatite/soapstone in West Sikkim district; ore deposit at Rangpo. Sikkim's Mines & Geology limestone in and marble in East Department had set up a pilot dimension rock cutting Sikkim and North Sikkim districts Table -1. The unit and pilot lime making unit to ascertain the reserves/resources of coal and the coalfield located feasibility of setting up of commercial lime plant and in Sikkim are reflected in Table-2. dimension rock cutting plant in the State. A ferro Exploration & Development alloys plant, namely, Akshay Ispat & Ferro Alloys Ltd with an installed capacity of 6,000 tpy is located Details of exploration activities conducted by at Mamring, . The present status GSI for base metal (Cu,Pb, & Zn) in the Sikkim State of these industries is not available. are furnished in Table-3.

Table – 2 : Reserves/Resources of Coal as on 1.4.2018 : Sikkim

(In million tonnes)

Coalfield Pr ov ed Indicated Inferred Tota l

Total/Rangit Valley - 5 8.2 5 4 2.9 8 1 0 1 .2 3

Source: Coal Directory of India, 2017-18

11-2 STATE REVIEWS

Table – 3 : Details of Exploration Activities in Sikkim, 2017-18

Agency/ Location Mapping Drilling Mineral/ Sampling Remarks District Scale Area No. of Meterage (No.) Reserves/Resources estimated (sq km) boreholes

GSI Base me tal Sikkim Aho-Yangtam, 1:12500 50 - - - A reconnaissance survey for Base Andheri Khola metals was taken up in this area by large sections scale mapping of 50 sq. km on 1:12500 scale. Visible metallic lustre (pyrite) specks are seen in mica schist/ phyllitic rocks along with quartz veins at Aho- Yangtam, Andheri Khola sections. Quartz veins within the amphibolite bands exposed in Selele khola section show specks of pyrite. Malachite, azurite stains were observed within garnetiferous mica schist of Gorubathan Formation at Kadamtam, Assam and Samdur areas. Intense leaching within the mica schist and phyllitic rocks was observed at Adampul and Lower Shari areas.

Rolep-Chuzachen, 1:12500 5 0 - - - Reconnaissance survey for Base metal Barapathang area mineralisation in this area, by mapping 50 sq. km on 1:12500 scale was carried out. The signature of mineralisation i.e. sulphide mineralisation in the form of leaching effects, visible metallic luster and specks of pyrite and chalcopyrite was seen within Darjeeling Gneiss at North Rigu area, Dokchin, Subeni Dara and Lingtam-Kuikhola road section. In the area around Dokchin, sulphide mineralisation is observed within Darjeeling gneiss, whereas around South Rigu, leaching effect is observed in calc- silicate rocks associated with amphibo- lites. Leaching effect is also observed at the contact between Lingtse Granite Gneiss and phyllite at Dalapchand - Arithar - Rhenock road junction area.

11-3 STATE REVIEWS - 6 0 (A+B) 958 950 Total 8.58 2756 2380 2382 21.47 20.07 56.69 17119 resources 949623 - 6 0 (B) 958 950 8.58 2756 2380 2382 Total 21.47 20.07 56.69 17119 949623 ------STD334 Reconnaissance - - 150 150 4.23 1.05 13.8 2756 2380 2382 16444 150000 STD333 Inferred ------675 STD332 Indicated ------3 300 300 8.47 27.6 Remaining Resources 300000 STD331 Measured - - - - 6 3 6 4 6 0 0.91 1.68 3.14 0.04 63780 STD222 - - - - - Pre-feasibility 6.9 445 436 7.86 12.88 15.25 STD221 435843 ------STD211 Feasibility ------(A) Total ------otification dated 10.02.2015. STD122 N Table– 1:Reserves/Resources of Mineralsas on 1-04-2015 :Sikkim ------Probable Reserves STD121 ------Proved STD 111 inerals vide Gazette M inor M Unit '000 tonnes '000 tonnes '000 tonnes '000 tonnes '000 tonnes '000 tonnes '000 tonnes '000 tonnes '000 tonnes tonne tonne '000 tonnes inerals before Gazette Notification dated 10.02.2015. # M # # ## opper Mineral C Ore Metal Dolomite Lead-Zinc Ore Lead metal Zinc metal Limestone Marble Quartzite Silver Ore Metal Talc/Steatite/ Soapstone Figures rounded# offDeclared as ## Minor

11-4