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 19
... planar relation ship with F - folds . F1 - fold forms are largely obscured this area except some relict small scale refolded structures at places . Structural analysis in 11 domains of Lawa sector Fig . 5 ) shows that the major ...
... planar relation ship with F - folds . F1 - fold forms are largely obscured this area except some relict small scale refolded structures at places . Structural analysis in 11 domains of Lawa sector Fig . 5 ) shows that the major ...
Page 20
... planar slip suggest that the buckling attained an advanced stage when layer parallel strain along the fold surface and shear stress along the cleavages dominated over actual buckle shortening ( Ramberg 1964 , Ghosh , 1968 ) . It may be ...
... planar slip suggest that the buckling attained an advanced stage when layer parallel strain along the fold surface and shear stress along the cleavages dominated over actual buckle shortening ( Ramberg 1964 , Ghosh , 1968 ) . It may be ...
Page 27
... planar structures , slaty cleavage and schistosity ( S1 ) in phyllites and schists respectively and a crenulation cleavage ( S2 ) are noted in the metapelites . S1 is the most pervasive planar structure in the metapelites and strikes ...
... planar structures , slaty cleavage and schistosity ( S1 ) in phyllites and schists respectively and a crenulation cleavage ( S2 ) are noted in the metapelites . S1 is the most pervasive planar structure in the metapelites and strikes ...
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