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 30
... sericite . It becomes difficult to 0.0 1.0 1.5 Aliv 2.0 vi iv Fig . 6. Ti Al plot of McCluskieganj amphiboles . Key as in Fig.4 . 1.5 metamorphosed basic rocks may explain such an ambi- guity in the relationship between bulk rock ...
... sericite . It becomes difficult to 0.0 1.0 1.5 Aliv 2.0 vi iv Fig . 6. Ti Al plot of McCluskieganj amphiboles . Key as in Fig.4 . 1.5 metamorphosed basic rocks may explain such an ambi- guity in the relationship between bulk rock ...
Page 31
... sericite . This is one of the main cause of alteration of plagioclase , where silica released from plagioclase are trapped by sericite ( Emmons , 1953 ) . It is also said that sericitization appears to have been a retrograde process and ...
... sericite . This is one of the main cause of alteration of plagioclase , where silica released from plagioclase are trapped by sericite ( Emmons , 1953 ) . It is also said that sericitization appears to have been a retrograde process and ...
Page 60
... sericite and scapolite is occasionally noticed . The smaller grains are usually very fresh and show lamellar twinning . The composition of the plagioclase is approximately An13 indicated by extinction angle ( X ' 010 in a Zone ...
... sericite and scapolite is occasionally noticed . The smaller grains are usually very fresh and show lamellar twinning . The composition of the plagioclase is approximately An13 indicated by extinction angle ( X ' 010 in a Zone ...
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