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 48
... surface though a few grains transverse to it are also present . Epidote and opaques occur as accessories . Opaques inclu- de mainly sulphides ( pyrite , chalcopyrite ) and oxides ( magnetite ) occurring as discrete clots / patches ...
... surface though a few grains transverse to it are also present . Epidote and opaques occur as accessories . Opaques inclu- de mainly sulphides ( pyrite , chalcopyrite ) and oxides ( magnetite ) occurring as discrete clots / patches ...
Page 51
... surface samples ana- lysed upto 2.2 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 ...
... surface samples ana- lysed upto 2.2 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 ...
Page 88
... surface runoff . The remaining part percolates through the rock formations at different rates depending on the ... surface of Kopili reservoir and Umrong reservoir is flat . But Kopili surface being elevated , a steep gradient towards ...
... surface runoff . The remaining part percolates through the rock formations at different rates depending on the ... surface of Kopili reservoir and Umrong reservoir is flat . But Kopili surface being elevated , a steep gradient towards ...
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