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
... Quartz grains are flattened parallel to the biotite - muscovite foliation , and show strong undulose extinction . Garnet Schistexhibits well developed foliation in which the micaceous bands alternate with quartz bands . Minerals in ...
... Quartz grains are flattened parallel to the biotite - muscovite foliation , and show strong undulose extinction . Garnet Schistexhibits well developed foliation in which the micaceous bands alternate with quartz bands . Minerals in ...
Page 21
... 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 + quartz * 7 ...
... 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 + quartz * 7 ...
Page 48
... quartz schist : This unit has been recorded both from the ' Potin Formation and the ' Yazali Zone ' . Prismatic , str- ongly pleochroic staurolite grains of ' Yazali zone ' are mostly unaltered , whereas those from the mineralised Zone ...
... quartz schist : This unit has been recorded both from the ' Potin Formation and the ' Yazali Zone ' . Prismatic , str- ongly pleochroic staurolite grains of ' Yazali zone ' are mostly unaltered , whereas those from the mineralised Zone ...
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