Records of the Geological Survey of India, Volume 114Geological Survey of India, 1984 - Earthquakes 1867- includes the "Annual report of the Geological survey of India". |
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Page 25
... iron and lime with low silica and magnesia content . The composition of hornblende and plagioclase indicates that they have cry- stallized at higher temperature than other meta - basic rocks of the area . Chemistry of minerals separated ...
... iron and lime with low silica and magnesia content . The composition of hornblende and plagioclase indicates that they have cry- stallized at higher temperature than other meta - basic rocks of the area . Chemistry of minerals separated ...
Page 28
... iron , and trivalent cations viz . alumina and ferric iron . The tetrahedrally co - ordinated aluminium is always in excess of one atom per formula unit , whereas the octahedral alumina with one exception , is as low as one half of an ...
... iron , and trivalent cations viz . alumina and ferric iron . The tetrahedrally co - ordinated aluminium is always in excess of one atom per formula unit , whereas the octahedral alumina with one exception , is as low as one half of an ...
Page 32
... IRON ORE SERIES --LATE ARCHAEAN- → Pegmatite and aplite Pegmatite and quartz veins Microgranite Porphyritc gneiss Granite gneiss Epidiorite Sen ( 1956 ) Porphyritic gneiss , migmati- tes and composite gneiss Hornblende schist and mica ...
... IRON ORE SERIES --LATE ARCHAEAN- → Pegmatite and aplite Pegmatite and quartz veins Microgranite Porphyritc gneiss Granite gneiss Epidiorite Sen ( 1956 ) Porphyritic gneiss , migmati- tes and composite gneiss Hornblende schist and mica ...
Contents
Integrated Geochemical Approach for Tracing Gold Mineralisation in Parts | 1 |
On Jacobsites from Vizianagaram Manganese Belt of Eastern Ghats Andhra | 15 |
Fossil Hippopotamus from Quaternary Alluvial Deposits of Narmada Valley | 17 |
Copyright | |
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actinolite amphiboles amphibolite analysis ARCHAEAN assemblage associated BANKURA DISTRICT Barakar basement bedrock samples Bihar Biotite boreholes catchment area Chakradharpur chemical colour composition country rocks crystals Dassarma Dolerite Domuhan river Dubrajpur Dubrajpur Formation Electron elements epidiorites geochemical Geol Geological Survey Ghose gneiss Goilkera gold grains Granite gneiss green GSI Type Haast river Hippopotamus hornblende hornblende schist host rock igneous jacobsite Kharswan strip Khatangi hill section magnetite manganese Manuscript received massive amphibolite Mayapur McCluskieganj meta-basic rocks metamorphic metres south mica schists mineralisation minerals namadicus Narmada Neogene nepheline syenite occur palaeindicus Pegmatite pelite phyllites plagioclase Porphyritic present area quartz Quartzite Quaternary ratios Rupatganj 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 three strips values vein-quartz veins West Bengal X-Ray