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
... quartz veins follow the fractures along the gneissosity & schisto- sity of the host rocks and are themselves highly fractured . Petrographic study of the tonalitic gneisses show that they contain higher percentage of quartz- grey in ...
... quartz veins follow the fractures along the gneissosity & schisto- sity of the host rocks and are themselves highly fractured . Petrographic study of the tonalitic gneisses show that they contain higher percentage of quartz- grey in ...
Page 102
... quartz + K - felspar + biotite ± Hbl ± plagioclase . The quartz is stretched , K - felspar is rarely myrmekitic . There is an overall mineralogi- cal consistency only with the biotite amount decreasing or increasing . The basic ...
... quartz + K - felspar + biotite ± Hbl ± plagioclase . The quartz is stretched , K - felspar is rarely myrmekitic . There is an overall mineralogi- cal consistency only with the biotite amount decreasing or increasing . The basic ...
Page 353
... Quartz vein Gneiss Strike and dip of bedding Microgranite Strike and dip of foliation Siliceous dolomite / Dolomite / quartzite Strike and dip of joint The mineralisation associated with the cluster of quartz veins warrants detailed ...
... Quartz vein Gneiss Strike and dip of bedding Microgranite Strike and dip of foliation Siliceous dolomite / Dolomite / quartzite Strike and dip of joint The mineralisation associated with the cluster of quartz veins warrants detailed ...
Contents
Overview of the DirectorinCharge | 107 |
East Coast DivisionII 117 | 117 |
West coast Division 127134 | 127 |
Copyright | |
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Common terms and phrases
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