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 210
... minerals derived from diamond bearing parent rocks . Stream sediments were collected from lower order streams . Minerals like pyrope - garnet , magnesian ilmenite , magnesian chromite and chrome diposide serve as suitable indi- cator ...
... minerals derived from diamond bearing parent rocks . Stream sediments were collected from lower order streams . Minerals like pyrope - garnet , magnesian ilmenite , magnesian chromite and chrome diposide serve as suitable indi- cator ...
Page 22
... minerals occur on the hill slope . Harmful minerals of sulphides and chlorite are absent but alteration of feldspars is occassionally noticeable . Inclusions of older rocks are occassionally seen . The granite- gneiss occurs in the ...
... minerals occur on the hill slope . Harmful minerals of sulphides and chlorite are absent but alteration of feldspars is occassionally noticeable . Inclusions of older rocks are occassionally seen . The granite- gneiss occurs in the ...
Page 70
... minerals are augite , titano - augite and aegirine augite . Alkali amphibole , biotite and nepheline occur as subor- dinate minerals . Sphene , apatite , rutile are the common acces- sories . Phenocrysts of olivine are present in the ...
... minerals are augite , titano - augite and aegirine augite . Alkali amphibole , biotite and nepheline occur as subor- dinate minerals . Sphene , apatite , rutile are the common acces- sories . Phenocrysts of olivine are present in the ...
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