Records of the Geological Survey of India, Volume 113, Part 3The Survey, 1985 - Earthquakes Vols. 1- include Report of the Geological Survey, 1867- ; v. 32- include Review of the mineral production of India, 1898/1903- ; v. 75 consists of Professional papers, no. 1-16; v. 76 consists of Bulletins of economic minerals. |
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Page 1
... metamorphism was of intermediate pressure type . A tentative metamorphic map , based on intergradational metamorphic assemblages , shows that the highest grade rocks ( granulite facies ) form a central belt with rocks of decreasing ...
... metamorphism was of intermediate pressure type . A tentative metamorphic map , based on intergradational metamorphic assemblages , shows that the highest grade rocks ( granulite facies ) form a central belt with rocks of decreasing ...
Page 8
... metamorphism represents the main metamorphic recrystallisation of the rocks in the area as recorded in the parametamorphics . The second phase of recrystallisation and neomineralisation needs corrobor- ation by detailed field ...
... metamorphism represents the main metamorphic recrystallisation of the rocks in the area as recorded in the parametamorphics . The second phase of recrystallisation and neomineralisation needs corrobor- ation by detailed field ...
Page 9
... metamorphic rocks and sence of metamorphic index minerals ( e.g. , garnet and manite ) within the neissic rocks strongly suggest a eral anatectic origin of the gneissic complex . Partial ting of the pre - existing rocks and formation of ...
... metamorphic rocks and sence of metamorphic index minerals ( e.g. , garnet and manite ) within the neissic rocks strongly suggest a eral anatectic origin of the gneissic complex . Partial ting of the pre - existing rocks and formation of ...
Contents
Structural evolution of Precambrians in parts of north Singhbhum BiharA Gupta | 13 |
Geology and mineralisation along the northern shear zone Purulia district West | 25 |
BengalAn upto date appraisalM N Kumar N Das and S Das Gupta | 33 |
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anomaly zone antiform apatite assemblage axial plane axis bands Barakar Formation Baripada Basu Beldih belt Bihar biotite carbon-phyllite Cataclasite Chaibasa Chaibasa Formation chlorite chlorite schist horizon conglomerate contours copper Dalma syncline deformation Dhanjori dipping district domains Dubrajpur Formation Dulmi F₁ F₂ feldspars folds foliation fraction geochemical Geol Geological Survey geophysical Ghosh gneiss grains granite granite gneiss granitic rocks Gupta hill hornblende Kandra Kutni kyanite limestone lineation magnetite metamorphic mica schists migmatites mineral mineralisation muscovite Northern Shear Zone occur Orissa panned heavy pelitic phyllite plagioclase planar Plate plunging Precambrian puckers pyrite quartz quartzite Rajmahal Rangpo Records Volume 113 regional S₁ plots S₂ samples Sarkar Sarwan Pahar section schist schistosity sector sequence sericite Shear Zone silicified Singhbhum Singhbhum Shear Zone springs stratigraphic stream sediment structural Subarnarekha river sulphide Surv Survey of India tectonic tectonite trench Turamdih upto