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 59
... Chaibasa Formation " psamo- pelites unconformably overlie the " Dhanjori Group " volcanosedimentary sequence . The chlorite schist horizon , hitherto referred as " shear zone " rocks with associated conglo- merates , arkose , quartzite ...
... Chaibasa Formation " psamo- pelites unconformably overlie the " Dhanjori Group " volcanosedimentary sequence . The chlorite schist horizon , hitherto referred as " shear zone " rocks with associated conglo- merates , arkose , quartzite ...
Page 64
... Chaibasa Formation in the vicinity of the entire length of the " Shear Zone " , for the first time the association of kyanite and black chert in a ground mass of musco- vite and sericite is reported from near the hinge of the Gohala ...
... Chaibasa Formation in the vicinity of the entire length of the " Shear Zone " , for the first time the association of kyanite and black chert in a ground mass of musco- vite and sericite is reported from near the hinge of the Gohala ...
Page 65
... Chaibasa For- mation mica schist , this chlorite schist horizon is sugges- ted to be included as the lower most member of the Chaibasa Formation of Sarkar and Saha ( 1962 ) . 4. Though there has been no structural break or discontinuity ...
... Chaibasa For- mation mica schist , this chlorite schist horizon is sugges- ted to be included as the lower most member of the Chaibasa Formation of Sarkar and Saha ( 1962 ) . 4. Though there has been no structural break or discontinuity ...
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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Common terms and phrases
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