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 52
Geological Survey of India. TABLE 1 - Details of the Ranga Valley Mineralised Zones Mineralised Zone Host rock Mineralogy Strike length ( in met- res ) Analytical data North of Ranga River 1. Pyrite zone ( Cobaltifer- ous ) Quartz ...
Geological Survey of India. TABLE 1 - Details of the Ranga Valley Mineralised Zones Mineralised Zone Host rock Mineralogy Strike length ( in met- res ) Analytical data North of Ranga River 1. Pyrite zone ( Cobaltifer- ous ) Quartz ...
Page 53
... Details of Borehole Intersections In Two Chalcopyrite Zones North andSouth of Ranga River Sl.No. Bore Hole No From То Zone of Mineralisation True Width ( in metres ) Cu - content ( in metres ) in percent ZONE - 1 1 . SRN - 1 6.10 11.45 ...
... Details of Borehole Intersections In Two Chalcopyrite Zones North andSouth of Ranga River Sl.No. Bore Hole No From То Zone of Mineralisation True Width ( in metres ) Cu - content ( in metres ) in percent ZONE - 1 1 . SRN - 1 6.10 11.45 ...
Page 56
... Details of Selected Core Samples Sample Nature of Analytical data ( in ppm ) No. Sample Mineral phases Cu Sn W 2/30 m Core 1.27 % 700 600 sample No discrete Sn - W ( whole ) 2/30 m Magnetic fraction G 1000 800 500 2/30 NM Non - mag- G ...
... Details of Selected Core Samples Sample Nature of Analytical data ( in ppm ) No. Sample Mineral phases Cu Sn W 2/30 m Core 1.27 % 700 600 sample No discrete Sn - W ( whole ) 2/30 m Magnetic fraction G 1000 800 500 2/30 NM Non - mag- G ...
Contents
A NOTE ON THE EVOLUTION OF THE MINERAL | 17 |
Pant | 24 |
A R Nambiar | 43 |
Copyright | |
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Common terms and phrases
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