Records of the Geological Survey of India, Volume 113Geological Survey of India, 1984 - Earthquakes 1867- includes the "Annual report of the Geological survey of India". |
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Page 179
... veins . The individual pegmatite veins vary from 10 m to 200 m in length and from 5 m to 30 m in width . Indistinct zoning is fairly common in the pegmatites having wide columbite has been recorded in the form of loose grains along the ...
... veins . The individual pegmatite veins vary from 10 m to 200 m in length and from 5 m to 30 m in width . Indistinct zoning is fairly common in the pegmatites having wide columbite has been recorded in the form of loose grains along the ...
Page 254
... veins and lenses within quartz micaschist and are composed of plagioclose felspar , quartz and mica . A length of 55 ... veins . The rocks have a general NNW - SSE trend with steep westerly dips . The pegmatites are generally emplaced ...
... veins and lenses within quartz micaschist and are composed of plagioclose felspar , quartz and mica . A length of 55 ... veins . The rocks have a general NNW - SSE trend with steep westerly dips . The pegmatites are generally emplaced ...
Page 255
... veins traverse the gneisses . Two zones of quartz veins were demarcated with 3 major and 2 minor veins trending in NNE - SSW direction and dipping eastward moderately to steeply . Thin streaks of galena were noticed in the major quartz vein ...
... veins traverse the gneisses . Two zones of quartz veins were demarcated with 3 major and 2 minor veins trending in NNE - SSW direction and dipping eastward moderately to steeply . Thin streaks of galena were noticed in the major quartz vein ...
Contents
MINERAL PHYSICS DIVISION | 159 |
ENGINEERING AND TRANSPORT DIVISION | 165 |
NORTH EASTERN REGION | 198 |
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amphibolite analysis Andhra Pradesh anomaly zones Asstt attended bands Banerjee basalt basemetal basin belt block boreholes Calcutta carried chalcopyrite charnockite Chemical Circle clay COALFIELD covering an area Deccan Traps delineated deposits depth dips Director DISTRICT dykes exploration exposed folds foliation Formation fossils geochemical geological mapping Geologist Jr Geophysical investigations geotechnical geothermal Ghosh gneiss Gondwana granite gravity grey Group Gupta Headquarters Hydel India indicated Karnataka Kumar laboratory laterite limestone lineament logging Lucknow Madhya Pradesh magnetic magnetite Maharashtra mapped an area meeting metres migmatite million tonnes mineral mineralisation nala NW-SE occur Orissa pegmatite phyllite pitting power house Project quartz veins quartzite Quaternary Rajasthan Region river rock types S/Shri sandstone scale schist sediments seismic seismic refraction shale sheet Shri sillimanite Singh spillway sq km sq km area Srivastava strike length studies sulphide Tamil Nadu thickness tion toposheet traverses trending tunnel upto