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 2
Geological Survey of India. The granite gneiss complex around Ranchi is a com- posite mass consisting mainly of granite gneiss , migma- tites and massive granite with enclaves of para- and orthometamorphics , dykes of dolerite and ...
Geological Survey of India. The granite gneiss complex around Ranchi is a com- posite mass consisting mainly of granite gneiss , migma- tites and massive granite with enclaves of para- and orthometamorphics , dykes of dolerite and ...
Page 34
... granite The major rock types of the area are different facies . of granite , which appear to occur as angular shapes perhaps reflecting emplacement pari passu with shearing movement ( Plate I ) . These angular blocks are made up of ( i ) ...
... granite The major rock types of the area are different facies . of granite , which appear to occur as angular shapes perhaps reflecting emplacement pari passu with shearing movement ( Plate I ) . These angular blocks are made up of ( i ) ...
Page 36
... Granite AA 17 48 34 27 50 ( 2 Sam- ples ) Sericite- Granite = L = R = Range in value ; AA - Arithmetic average ; Less than . The above table shows wide fluctuation in the concen- tration level of chalcophile elements in all the sub ...
... Granite AA 17 48 34 27 50 ( 2 Sam- ples ) Sericite- Granite = L = R = Range in value ; AA - Arithmetic average ; Less than . The above table shows wide fluctuation in the concen- tration level of chalcophile elements in all the sub ...
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