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 13
... deformation resulting from a layer parallel compression buckled the stratification ( S。) into reclined to inclined folds ( F1 ) with concomitant development of earliest mineral schistosity ( S1 ) . The first deformation culminated in a ...
... deformation resulting from a layer parallel compression buckled the stratification ( S。) into reclined to inclined folds ( F1 ) with concomitant development of earliest mineral schistosity ( S1 ) . The first deformation culminated in a ...
Page 16
... deformation are defined by the longest axes of the deformed conglomeratic pebbles and mineral lineations marked ubiquitously in the metamorphites by preferred dimensional orientation of prismatic and flaky minerals . In Turamdih sector ...
... deformation are defined by the longest axes of the deformed conglomeratic pebbles and mineral lineations marked ubiquitously in the metamorphites by preferred dimensional orientation of prismatic and flaky minerals . In Turamdih sector ...
Page 62
... deformation . At places these L1 - lineations are deformed by F2 - structures ( cf. Mukhopadhyay et al , 1975 ; Basu et al , 1977 ) . 3. The crenulation foliations or slip schistosity ( S2 ) widely accepted as " Shear Planes " ( Roy ...
... deformation . At places these L1 - lineations are deformed by F2 - structures ( cf. Mukhopadhyay et al , 1975 ; Basu et al , 1977 ) . 3. The crenulation foliations or slip schistosity ( S2 ) widely accepted as " Shear Planes " ( Roy ...
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