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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... DISTRICT , SIKKIM N. C. Pant 47 17 4 . ALKALINE MAGMATISM IN PARTS OF WEST KHASI HILLS AND EAST GARO HILLS DISTRICTS , MEGHALAYA 25 25 A. R. Nambiar 5 . A REVIEW NOTE ON THE RANGA VALLEY POLY- METALLIC PROSPECT , LOWER SUBANSIRI DISTRICT ...
... DISTRICT , SIKKIM N. C. Pant 47 17 4 . ALKALINE MAGMATISM IN PARTS OF WEST KHASI HILLS AND EAST GARO HILLS DISTRICTS , MEGHALAYA 25 25 A. R. Nambiar 5 . A REVIEW NOTE ON THE RANGA VALLEY POLY- METALLIC PROSPECT , LOWER SUBANSIRI DISTRICT ...
Page 46
... district headquarters of the Lower Subansiri district . - The ' Potin Formation ' comprises phyllite , mica - schist and its variants , biotite - gneiss , augen gneiss and pegmatites . This NE SW to NNE _- SSW trending unit could be ...
... district headquarters of the Lower Subansiri district . - The ' Potin Formation ' comprises phyllite , mica - schist and its variants , biotite - gneiss , augen gneiss and pegmatites . This NE SW to NNE _- SSW trending unit could be ...
Page 87
... district of Assam is one of the very sparsely populated districts of the State . The population density in the district is the lowest in the State . Terrain being moderately rugged and intervened by narrow flat partly cultivable valleys ...
... district of Assam is one of the very sparsely populated districts of the State . The population density in the district is the lowest in the State . Terrain being moderately rugged and intervened by narrow flat partly cultivable valleys ...
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