Records of the Geological Survey of India, Volume 129, Parts 2-3The Survey, 1998 - 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 68
... veins : - of undeformed microgranite are common in the foliated hornblende - biotite gneiss and porphyritic granite . These veins vary in thickness from 1 / 2m to 4 m . The first set is oriented parallel to the host gneiss and the ...
... veins : - of undeformed microgranite are common in the foliated hornblende - biotite gneiss and porphyritic granite . These veins vary in thickness from 1 / 2m to 4 m . The first set is oriented parallel to the host gneiss and the ...
Page 117
... veins present are paral- lel to S1 , S2 or are discordant to both the cleavages and formational contacts . The old workings occur all over the area and may or may not be associated with quartz veins . The old working pits and the quartz ...
... veins present are paral- lel to S1 , S2 or are discordant to both the cleavages and formational contacts . The old workings occur all over the area and may or may not be associated with quartz veins . The old working pits and the quartz ...
Page 4
... veins have invariably intruded into the volcano - sedimentary assemblage and are of varying strike lengths . The width of the veins vary from a few millimeter to about 5 m . Ribbon quartz is found both in the massive basalts and in the ...
... veins have invariably intruded into the volcano - sedimentary assemblage and are of varying strike lengths . The width of the veins vary from a few millimeter to about 5 m . Ribbon quartz is found both in the massive basalts and in the ...
Contents
Stratigraphy Division | 11 |
Central Petrological Laboratories | 26 |
Geodata and Database Division | 43 |
Copyright | |
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acid volcanics aeromagnetic amphibolite anomaly bands Barakar Barakar Formation Barren Measure basemetal basic basin belt Bhutan Bihar biotite block boreholes charnockite Chhotanagpur clay coal seams Coalfield coarse Code core covered depth district Division drilling dykes east eastern faults field season foliation geochemical GEOLOGICAL MAP geophysical GEOTECHNICAL INVESTIGATION Ghosh gneiss gneissic gold Gondwana grade grained granite granite gneiss grey ground evaluation heavy minerals India indicated intersected intrusives Kamthi laterite limestone lineament located magnetic mica schist migmatite mineralisation nala NW-SE occur Orissa OVERVIEW pegmatite phyllite plagioclase Pradesh programme Project Proterozoic Purulia Purulia district quartz quartz veins quartzite Raniganj REGIONAL EXPLORATION river samples sand sandstone scale schist seam zones sector sediments sequence shale shear zone Sikkim Singhbhum southern sq km sq.km STAGE GEOTECHNICAL INVESTIGATION strike length structure sulphide surface survey Talchir terrain thickness tion Toposheet trending ultramafic upto varies West Bengal