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
... foliation , at 20 to the major foliation , is defined by chlorite . Quartz grains are flattened parallel to the biotite - muscovite foliation , and show strong undulose extinction . Garnet Schistexhibits well developed foliation in ...
... foliation , at 20 to the major foliation , is defined by chlorite . Quartz grains are flattened parallel to the biotite - muscovite foliation , and show strong undulose extinction . Garnet Schistexhibits well developed foliation in ...
Page 19
... Foliated granite interbedded with quartzite beds ranging in thick- ness from a few centimeters to 80 meters ... foliations mainly defined by muscovite , biotite and chlo- rite ; porphyroblasts of garnet and staurolite well developed ...
... Foliated granite interbedded with quartzite beds ranging in thick- ness from a few centimeters to 80 meters ... foliations mainly defined by muscovite , biotite and chlo- rite ; porphyroblasts of garnet and staurolite well developed ...
Page 47
... foliated , puckered sub - unit occurs in the western margin of the mineralised zone . Cordierite is fractured , and ... foliation planes defined by the flaky minerals . The garnet grains are rotated with mica flakes swerving around them ...
... foliated , puckered sub - unit occurs in the western margin of the mineralised zone . Cordierite is fractured , and ... foliation planes defined by the flaky minerals . The garnet grains are rotated with mica flakes swerving around them ...
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