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 20
... phases . Hence , to graphically bring out the genetic relationships the metapelitic assemblages have been plotted on ... phase assemblage - [ staurolite + biotite + cordierite + garnet muscovite + quartz ] was not observed . Thus it is ...
... phases . Hence , to graphically bring out the genetic relationships the metapelitic assemblages have been plotted on ... phase assemblage - [ staurolite + biotite + cordierite + garnet muscovite + quartz ] was not observed . Thus it is ...
Page 45
... phase could be identified . Locally , the chalcopyrite zones analysed higher concentration of Sn and W , and discrete ... phases of mineralisation . Introduction The polymetallic sulplhide occurrence in the Precam- brian schistose units ...
... phase could be identified . Locally , the chalcopyrite zones analysed higher concentration of Sn and W , and discrete ... phases of mineralisation . Introduction The polymetallic sulplhide occurrence in the Precam- brian schistose units ...
Page 56
... 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 1000 1000 700 netic fraction Phase identi- fiable under the microscope Magnetite - cass- iterite ...
... 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 1000 1000 700 netic fraction Phase identi- fiable under the microscope Magnetite - cass- iterite ...
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