Records of the Geological Survey of India, Volume 125, Part 2The Survey, 1992 - Earthquakes Vols. 1- include Report of the Geological Survey, 1867- ; v. 32- include Review of the mineral production of India, 1898/1903- ; v. 75 consists of Professional papers, no. 1-16; v. 76 consists of Bulletins of economic minerals. |
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Page 47
... contain higher percentage of quartz- grey in colour , moderate plagioclase ( albitic compo- sition ) with biotite as major flaky phase : and with muscovite , zircon , sphene epidote as accessories . The quartz - albite chlorite schists ...
... contain higher percentage of quartz- grey in colour , moderate plagioclase ( albitic compo- sition ) with biotite as major flaky phase : and with muscovite , zircon , sphene epidote as accessories . The quartz - albite chlorite schists ...
Page 48
... contain epidote , alternating with layers containing quartz . These quartz show a gen- eral tendency towards recrystallisation and poly- gonisation ; occasionally quartz is elongated and strained . K - feldspar shows ribbon and flame ...
... contain epidote , alternating with layers containing quartz . These quartz show a gen- eral tendency towards recrystallisation and poly- gonisation ; occasionally quartz is elongated and strained . K - feldspar shows ribbon and flame ...
Page 131
... contain heavy minerals from 1.2 to 9.6 % by weight . It has also been observed that the heavy mineral content is ... contain more than 4 % of heavy minerals by weight . Hence , it may be inferred that an area of about 100 sq . km contain ...
... contain heavy minerals from 1.2 to 9.6 % by weight . It has also been observed that the heavy mineral content is ... contain more than 4 % of heavy minerals by weight . Hence , it may be inferred that an area of about 100 sq . km contain ...
Contents
Overview of the DirectorinCharge | 107 |
East Coast DivisionII 117 | 117 |
West coast Division 127134 | 127 |
Copyright | |
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aeromagnetic amphibolite analysis Andhra Pradesh anomalies bands Barakar Barakar Formation Barren Measures Formation basemetal basin belt Bhutan BIHAR biotite block boreholes chalcopyrite charnockite clay coal seams COALFIELD coarse grained Code copper covered deposition depth range DISTRICT Division drilling dyke east eastern EXPLORATION FOR COAL fault felsic field season folds foraminifera geochemical GEOLOGICAL MAP geophysical gneiss Gondwana grade grey Group heavy mineral horizon INDEX India indicate intersected in boreholes investigation isobath isotopic Kamthi Formation lignite limestone line km lineaments located MADHYA PRADESH magnetic magnetite Maharashtra metamorphism migmatites million tonnes mineralisation NW-SE occur Orissa phyllite plagioclase PLATE-I Precambrian quartz quartz veins quartzite Rajasthan Raniganj Raniganj Formation REGIONAL EXPLORATION rocks Saharjuri sand sandstone schist seabed seam zones sector sediments shallow shelf silty Singhbhum sq km strike length studies sulphide survey Talchir Formation tectonic thickness Thimphu toposheet trending upto varies volcanic