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 45
... ( Potin Formation ) was recorded about a qua- ter century ago during reconnaissance surveys in the erstwhile N.E.F.A. Based on preliminary exploration carried out by Geological Survey of India , three separate mineralized zones were ...
... ( Potin Formation ) was recorded about a qua- ter century ago during reconnaissance surveys in the erstwhile N.E.F.A. Based on preliminary exploration carried out by Geological Survey of India , three separate mineralized zones were ...
Page 46
... Potin Formation ' ( Balasundaram , 1972 ) exposed between 41 km and 43 km posts of the all weather road linking Kimin ( at foothill ) with Ziro , the district headquarters of the Lower Subansiri district . - The ' Potin Formation ...
... Potin Formation ' ( Balasundaram , 1972 ) exposed between 41 km and 43 km posts of the all weather road linking Kimin ( at foothill ) with Ziro , the district headquarters of the Lower Subansiri district . - The ' Potin Formation ...
Page 49
... Potin Formation ' near Gamji nala . The lenses are mostly aligned parallel to the foliation planes . Under the microscope , hornblende ( pleochroic scheme X- pale brown , Y - green , Z - dark brown ; X > Y > Z ) , is the dominant ...
... Potin Formation ' near Gamji nala . The lenses are mostly aligned parallel to the foliation planes . Under the microscope , hornblende ( pleochroic scheme X- pale brown , Y - green , Z - dark brown ; X > Y > Z ) , is the dominant ...
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