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 18
... biotite gneiss unit . The Units C and D are petrographically differentiated by the feldspar content , which ... biotite schist , garnet schist , staurolite schist and kyanite schist . Garnet and biotite schists commonly alternate with ...
... biotite gneiss unit . The Units C and D are petrographically differentiated by the feldspar content , which ... biotite schist , garnet schist , staurolite schist and kyanite schist . Garnet and biotite schists commonly alternate with ...
Page 21
... biotite + Muscovite + quartz * 2 Staurolite + garnet + biotite + muscovite + quartz * 3 Cordierite + 4 Garnet + garnet + biotite biotite + + muscovite + quartz quartz + muscovite * 5 6 Kyanite Chlorite + biotite + muscovite + quartz + ...
... biotite + Muscovite + quartz * 2 Staurolite + garnet + biotite + muscovite + quartz * 3 Cordierite + 4 Garnet + garnet + biotite biotite + + muscovite + quartz quartz + muscovite * 5 6 Kyanite Chlorite + biotite + muscovite + quartz + ...
Page 49
... biotite and in the interspace between biotite grains . Minor strongly pleochroic hornblende is associated with biotite . 3. Metabasics These rocks occur as minor pods ( 2 X 3 cms to 16 X 20 cms in diameter ) within the garnet - biotite ...
... biotite and in the interspace between biotite grains . Minor strongly pleochroic hornblende is associated with biotite . 3. Metabasics These rocks occur as minor pods ( 2 X 3 cms to 16 X 20 cms in diameter ) within the garnet - biotite ...
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