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 51
... percent Co and 42 percent S , no discrete Co - phase has been reported by earlier workers . ( Sangma et.al , 1984 ) . b ) Zone of chalcopyrite ( Locally with Tin - Tungsten ) Based on the surface and sub - surface data , two distinct ...
... percent Co and 42 percent S , no discrete Co - phase has been reported by earlier workers . ( Sangma et.al , 1984 ) . b ) Zone of chalcopyrite ( Locally with Tin - Tungsten ) Based on the surface and sub - surface data , two distinct ...
Page 54
... percent W and greater than 1000 ppm Sn . ( Sangma et al , 1984 ) . ii ) The other N 10 ° E 10 ° E - s 10 ° w trending zone of chal- copyrite mineralisation located south of the Ranga river ( Fig . 10 ) has been traced intermittently for ...
... percent W and greater than 1000 ppm Sn . ( Sangma et al , 1984 ) . ii ) The other N 10 ° E 10 ° E - s 10 ° w trending zone of chal- copyrite mineralisation located south of the Ranga river ( Fig . 10 ) has been traced intermittently for ...
Page 88
... percent which drops down to 20 percent in the winter months . Premonsoon showers start from March with intervening dry spells of gusty winds . The period between June to August is marked by continuous downpour , at times , stretching ...
... percent which drops down to 20 percent in the winter months . Premonsoon showers start from March with intervening dry spells of gusty winds . The period between June to August is marked by continuous downpour , at times , stretching ...
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