Records of the Geological Survey of India, Volume 131, Parts 2-3Government of India, 1996 - Geology Includes the "Annual report of the Geological Survey of India," 1867- |
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Page 32
... quartz + muscovite + sericite + opaques ± plagioclase biotite ± garnet ± zircon ± apatite ± epidote . Quartz occur both as phenocrysts and as groundmass constitutents . A volcanic to sub - volcanic texture is exhibited . Phenocryts of ...
... quartz + muscovite + sericite + opaques ± plagioclase biotite ± garnet ± zircon ± apatite ± epidote . Quartz occur both as phenocrysts and as groundmass constitutents . A volcanic to sub - volcanic texture is exhibited . Phenocryts of ...
Page
... quartz , plagioclase and horn- blende , chiefly with microcline , biotite and apatite as accessories . The tonalite - granodiorite gneiss is overlain by meta- basalt and is intruded by related metabasic dykes . A package of meta ...
... quartz , plagioclase and horn- blende , chiefly with microcline , biotite and apatite as accessories . The tonalite - granodiorite gneiss is overlain by meta- basalt and is intruded by related metabasic dykes . A package of meta ...
Page 4
... quartz vein . Banded gneiss grades into granite gneiss at places . Banded gneiss is hard , massive , foliated and con- sists of alternate felsic and mafic bands . Under mi- croscope . the rock consists of alternate layers of quartz ...
... quartz vein . Banded gneiss grades into granite gneiss at places . Banded gneiss is hard , massive , foliated and con- sists of alternate felsic and mafic bands . Under mi- croscope . the rock consists of alternate layers of quartz ...
Contents
COAL WING | 128 |
Geophysics Division | 209 |
Operation West Coast I | 239 |
Copyright | |
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amphibolite analysis anomaly bands Barakar Barakar Formation basin belt Bihar biotite block borehole carried chlorite clay Coalfield Code core covered Cruise delineated depth Director district Division drilling Dzongkhag east East Singhbhum eastern exploration for coal facies fault feldspar field season folds foliation garnet geochemical geoenvironmental GEOLOGICAL MAP geophysical geotechnical investigation gneiss Gondwana grade granite granite gneiss granulite grey Group heavy mineral INDEX indicated intersected Kamthi lignite limestone located Madhya Pradesh magnetic metamorphism mineralised zone nala occur Orissa OVERVIEW pegmatite phyllite plagioclase Plate programme Project prospect Purulia quartz quartz veins quartzite range Raniganj REGIONAL EXPLORATION ridge river samples were collected sand sandstone scale schist seabed sector sediments shale shallow shear zone Singhbhum slope soil spillway sq km stage geotechnical investigation structural sulphide surface survey Talchir thickness Toposheet traverses trending ultramafic upto Valley varies volcanics West Bengal