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 3
... folds in the quartzite enclaves and the foliation in the adjacent granite gneiss gives further support to the axial plane status of S .. 3. Fracture cleavage ( S3 ) : It is only locally develo- ped and occurs parallel to the axial plane ...
... folds in the quartzite enclaves and the foliation in the adjacent granite gneiss gives further support to the axial plane status of S .. 3. Fracture cleavage ( S3 ) : It is only locally develo- ped and occurs parallel to the axial plane ...
Page 4
... folds ; the flexural slip is indicated by disharmonic folds and crumpling at the fold arches , while the slip is evi- denced by transposition of S1 into S2 and displacement along S ,. The axial plunges of these folds show much scatter ...
... folds ; the flexural slip is indicated by disharmonic folds and crumpling at the fold arches , while the slip is evi- denced by transposition of S1 into S2 and displacement along S ,. The axial plunges of these folds show much scatter ...
Page 17
... folds and puckers is a promi- ent feature in the southern part of the belt , though ot uncommon in other parts . This has often displaced he hinges of F2 - folds and produced sigmoids on S. and The puckers on S2 are the most prominent ...
... folds and puckers is a promi- ent feature in the southern part of the belt , though ot uncommon in other parts . This has often displaced he hinges of F2 - folds and produced sigmoids on S. and The puckers on S2 are the most prominent ...
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