Records of the Geological Survey of India, Volume 114Geological Survey of India, 1979 - Earthquakes 1867- includes the "Annual report of the Geological survey of India". |
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Page 33
... Biotite granodiorite ( 635 Ma ) Biotite gneiss ( diorite ) ( 700 Ma ) Amphibolite ( 765 Ma ) Pegmatite , aplite , quartz and feldspar veins Amphibolite ( massive ) Pegmatite , aplite , grano- phyre and quartz veins Porphyritic biotite ...
... Biotite granodiorite ( 635 Ma ) Biotite gneiss ( diorite ) ( 700 Ma ) Amphibolite ( 765 Ma ) Pegmatite , aplite , quartz and feldspar veins Amphibolite ( massive ) Pegmatite , aplite , grano- phyre and quartz veins Porphyritic biotite ...
Page 60
... Biotite is often closely associated with the grains of apatite and opaque minerals . Biotite is very strongly pleochroic from pale straw yellow to dark greenish brown . Nepheline almost always occurs as coarse anhedral grains ...
... Biotite is often closely associated with the grains of apatite and opaque minerals . Biotite is very strongly pleochroic from pale straw yellow to dark greenish brown . Nepheline almost always occurs as coarse anhedral grains ...
Page 70
... biotite and hornblende flakes , which flakes , which suggests the effect of metamorphism . The mineral assemblage in order of abundance consists of quartz , microline , plagioclase , hornblende , biotite and magne- tite . Flaky minerals ...
... biotite and hornblende flakes , which flakes , which suggests the effect of metamorphism . The mineral assemblage in order of abundance consists of quartz , microline , plagioclase , hornblende , biotite and magne- tite . Flaky minerals ...
Contents
Integrated Geochemical Approach for Tracing Gold Mineralisation in Parts of | 1 |
On Jacobsites from Vizianagaram Manganese Belt of Eastern Ghats Andhra | 15 |
Fossil Hippopotamus from Quaternary Alluvial Deposits of Narmada Valley | 17 |
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Common terms and phrases
actinolite amphiboles amphibolites analysis Archaean assemblage BANKURA DISTRICT Barakar Barakar Formation basement bedrock samples Bihar biotite boreholes calcite catchment area Chakradharpur chemical Chittorgarh coarse colour composition country rocks crystals Dassarma deposit Dubrajpur Dubrajpur Formation Electron elements epidiorites fossils geochemical Geol Geological Survey Ghose gneiss Goilkera granite gneiss GSI Type Hippopotamus hornblende hornblende schist host rock jacobsite Kharswan Khatangi hill section lithological magnetite manganese Manuscript received massive amphibolites McCluskieganj meta-basic rocks metamorphic metres mineralisation minerals namadicus Narmada nepheline syenite Nimbahera Nimbahera limestone occur palaeindicus phyllitic plagioclase Plate present area quartz Quartzite Quaternary Rajmahal Hills Records Vol river Rupatganj Sah and Shah Sawa schist schistose schistose amphibolite sediments shale Singhbhum Singhbhum Shear Zone specimens stratigraphic stream sediment-concentrate samples sulphide Surv Survey of India Table-II Talapatra texture values vein-quartz veins Vindhyan West Bengal X-Ray Λ Λ