Records of the Geological Survey of India, Volume 115, Parts 3-4The Survey, 1987 - 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 34
... associated crustal rifts appear to be responsible for the characteristic alkaline carbonatite magmatism in the area . The subsurface data from the Bengal plains and the Indian Ocean suggest that the Sylhet volcanism has a wider span in ...
... associated crustal rifts appear to be responsible for the characteristic alkaline carbonatite magmatism in the area . The subsurface data from the Bengal plains and the Indian Ocean suggest that the Sylhet volcanism has a wider span in ...
Page 39
... associated rocks of Sung Valley , Jaintia Hills District , Meghalaya , India . Jour . Geol . Soc . Ind . , V. 26 , pp . 361-379 . Peralkaline volcanism , crustal swelling and rifting Nature , V. 230 pp . 85-87 . Carbonatite magmas , Min ...
... associated rocks of Sung Valley , Jaintia Hills District , Meghalaya , India . Jour . Geol . Soc . Ind . , V. 26 , pp . 361-379 . Peralkaline volcanism , crustal swelling and rifting Nature , V. 230 pp . 85-87 . Carbonatite magmas , Min ...
Page 81
... associated with carbonaceous shale . Further northeast , thick coal seams were found in this litho - assemblage . Here , this litho - assemblage was designated as Baragolai and Tikak parbat or simply as Coal measures . Accordingly ...
... associated with carbonaceous shale . Further northeast , thick coal seams were found in this litho - assemblage . Here , this litho - assemblage was designated as Baragolai and Tikak parbat or simply as Coal measures . Accordingly ...
Contents
A NOTE ON THE EVOLUTION OF THE MINERAL | 17 |
Pant | 24 |
A R Nambiar | 43 |
Copyright | |
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aegirine alkaline rocks Arunachal Pradesh assemblage Barail Range bedded biotite borehole Brahmaputra camptonites carbonatite Chalcopyrite charnockite chlorite Coal cordierite deposits Disang dissected hills drainage dyke Evans feldspar feldspathic ijolite flood plain foliation fractured garnet Geol GEOLOGICAL SURVEY gneiss Golagar basin Golagar Nala grains GSI Rec 115 Hills district Himalaya ijolite immiscibility Indravati river inner belt Kohima Kohima synclinorium Kopili Koraput lamprophyres landforms magma magnetite Manipur Meghalaya metamorphic metapelites Mikir hills mineral mineralised zone muscovite Nagaland Nala Naogaon Naogaon Sandstone NE-SW occur Orissa orthoclasite phenocrysts Phyangla Plate point bar polymetallic porphyroblasts Potin Formation pyrite pyrrhotite quartz Ranga River Ranga Valley Rec 115 pts region ridge and valley samples San Nala sandstone schist shale Shillong staurolite Structural Plateau Subansiri district sulphide mineralisation Surma Surv SURVEY OF INDIA synclinorium tectonic Tikak parbat tinguaite trending tributaries type area Umrong reservoir units Upper Assam upto