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 31
... plagioclase of the present area are broadly homogeneous in nature . There is no marked optical and chemical differences in the plagioclases of schistose and massive amphibolites . Absence of twinning in most of the plagioclase suggests ...
... plagioclase of the present area are broadly homogeneous in nature . There is no marked optical and chemical differences in the plagioclases of schistose and massive amphibolites . Absence of twinning in most of the plagioclase suggests ...
Page 37
... plagioclase , normative orthoclase decreases with increasing anorthite content . On the other hand , in high temperature plagioclase the potash shows an increase ( Engel et al , 1962 ) . The plagioclase of the schistose amphibolite ...
... plagioclase , normative orthoclase decreases with increasing anorthite content . On the other hand , in high temperature plagioclase the potash shows an increase ( Engel et al , 1962 ) . The plagioclase of the schistose amphibolite ...
Page 38
... Plagioclase from schistose amphibolite Plagioclase from massive amphibolite 1 Ca ( plagioclase ) Fig.10 . Diagram showing distribution of C □ between plagioclase and the host rock . AI 3 5 10 Si Fig.11 . Si - Al plot of plagioclase ...
... Plagioclase from schistose amphibolite Plagioclase from massive amphibolite 1 Ca ( plagioclase ) Fig.10 . Diagram showing distribution of C □ between plagioclase and the host rock . AI 3 5 10 Si Fig.11 . Si - Al plot of plagioclase ...
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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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