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
... trending North Purulia Shear Zone ( NPSZ ) near Noahatu and Timangda as E - W trending lensoid bod- ies emplaced within the high grade schists and gran- ite gneiss . These are composed of very coarse pink feldspar ( microcline ) ...
... trending North Purulia Shear Zone ( NPSZ ) near Noahatu and Timangda as E - W trending lensoid bod- ies emplaced within the high grade schists and gran- ite gneiss . These are composed of very coarse pink feldspar ( microcline ) ...
Page 162
... trending NW- SW are exposed intermittently within the gneissic terrain . The rock is dark , medium grained , hard and compact showing bouldary nature on surface and sheet like structure deep in the quarries . The dykes have a length of ...
... trending NW- SW are exposed intermittently within the gneissic terrain . The rock is dark , medium grained , hard and compact showing bouldary nature on surface and sheet like structure deep in the quarries . The dykes have a length of ...
Page 54
... trending gentle antiformal structure which has been subsequently affected by a later phase of E - W trending saddle along the hinge area , thus cross folding the entire structure in a doubly plunging geometry . 1 Petrographic studies ...
... trending gentle antiformal structure which has been subsequently affected by a later phase of E - W trending saddle along the hinge area , thus cross folding the entire structure in a doubly plunging geometry . 1 Petrographic studies ...
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