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 5
... present in minor amounts in some ections . Laths of plagioclase with composition ranging between An 45 - An 65 are present in subordinate amounts . The other minerals include biotite , iron - oxides , quartz ind accessories epidote ...
... present in minor amounts in some ections . Laths of plagioclase with composition ranging between An 45 - An 65 are present in subordinate amounts . The other minerals include biotite , iron - oxides , quartz ind accessories epidote ...
Page 50
... present . This lineation , formed by corrugation on the surface of the schistosity plane , plunges 30 ° -40 ° due N 35 ° E to N 50 ° E . The rock is mostly composed of quartz and sericite and chlorite and muscovite are present as minor ...
... present . This lineation , formed by corrugation on the surface of the schistosity plane , plunges 30 ° -40 ° due N 35 ° E to N 50 ° E . The rock is mostly composed of quartz and sericite and chlorite and muscovite are present as minor ...
Page 51
... present in this area has been noticed to ssociated with this type of silicification and sulphidi- on , in the host rock chlorite - quartz - schist . But the present in pyrite is not chemically compounded with nd probably occurs as ...
... present in this area has been noticed to ssociated with this type of silicification and sulphidi- on , in the host rock chlorite - quartz - schist . But the present in pyrite is not chemically compounded with nd probably occurs as ...
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