Records of the Geological Survey of India, Volume 129, Parts 3-4Government of India, 1994 - Geology Includes the "Annual report of the Geological Survey of India," 1867- |
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Page 10
... gneiss , dark grey granite gneiss , very coarse pink porphyroblastic gran- ite gneiss and epidote bearing pink granite . The meta- sediments are represented by garnet- sillimanite bear- ing mica schist , calc - silicates , calc - gneiss ...
... gneiss , dark grey granite gneiss , very coarse pink porphyroblastic gran- ite gneiss and epidote bearing pink granite . The meta- sediments are represented by garnet- sillimanite bear- ing mica schist , calc - silicates , calc - gneiss ...
Page 117
... Gneiss -W ) PETROLOGICAL AND GEOCHEMICAL STUDIES OF THE VOLCANIC ROCKS , CARBONATE. ( 73.22 % ) , high Na , O ( 2.6 % ) and K2O ( 4.66 % ) with Al , 0 , ( 12.28 % ) which indicate its rhyolitic composition . Samples of acid volcanic ...
... Gneiss -W ) PETROLOGICAL AND GEOCHEMICAL STUDIES OF THE VOLCANIC ROCKS , CARBONATE. ( 73.22 % ) , high Na , O ( 2.6 % ) and K2O ( 4.66 % ) with Al , 0 , ( 12.28 % ) which indicate its rhyolitic composition . Samples of acid volcanic ...
Page 132
... gneisses traversed by younger acid and basic intrusives . The metasedimentary rocks are rep- resented by calc - quartzite , calc - amphibolite , calc - sili- cate , calc - gneiss , tremolite - actinolite bearing amphib- olite , mica ...
... gneisses traversed by younger acid and basic intrusives . The metasedimentary rocks are rep- resented by calc - quartzite , calc - amphibolite , calc - sili- cate , calc - gneiss , tremolite - actinolite bearing amphib- olite , mica ...
Contents
WEST BENGAL SIKKIM A N ISLANDS | 1 |
Report of investigation for rare metal mineralisation within pegmatite | 7 |
Gold | 14 |
Copyright | |
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acid volcanics amphibolite Andaman anomaly Arunachal Pradesh Assam bands basemetal basin bed rock belt Bihar biotite block boreholes Chhotanagpur clay Code colour comprising conglomerate covered depth Division drilling dykes east eastern Engineering Geology erosion exploration exposed fault feldspar field season fold foliation Formation geochemical GEOLOGICAL MAP geophysical GEOTECHNICAL INVESTIGATION gneiss gneissic gold Gondwana grade granite granite gneiss granitoids grey Group of rocks GSI Rec Hills district identified intrusives Karbi Anglong laterite limestone lineament lithological located medium grained Meghalaya mica schist migmatites mineralisation minerals nala occurs Orissa OVERVIEW pegmatite phyllite plagioclase Proterozoic Purulia district quartz quartz veins quartzite Quaternary Region river sand sandstone scale schist sector sequence shale Shillong Shillong Group Sikkim siltstone Singhbhum slope soil spillway sq km STAGE GEOTECHNICAL INVESTIGATION stream sediment samples structure sulphide Surface SURVEY OF INDIA terrain thick Toposheet trending ultramafic upto West Bengal western