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 30
... sericite . It becomes difficult to 0.0 1.0 1.5 2.0 ΑΓ Aliv Fig . 6. Ti vi iv Al plot of McCluskieganj amphiboles Key as in Fig.4 . metamorphosed basic rocks may explain such an ambi- guity in the relationship between bulk rock analysis ...
... sericite . It becomes difficult to 0.0 1.0 1.5 2.0 ΑΓ Aliv Fig . 6. Ti vi iv Al plot of McCluskieganj amphiboles Key as in Fig.4 . metamorphosed basic rocks may explain such an ambi- guity in the relationship between bulk rock analysis ...
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 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