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 31
... samples of the area are compared with standard analyses of similar rocks in Table - I. CIPW normative compositions are presented in Table - II . The lamprophyres of the area are characterised by high Cal and Mg0 , low Al , 0 , and Si0 ...
... samples of the area are compared with standard analyses of similar rocks in Table - I. CIPW normative compositions are presented in Table - II . The lamprophyres of the area are characterised by high Cal and Mg0 , low Al , 0 , and Si0 ...
Page 56
... Samples Sample Nature of Analytical data ( in ppm ) No. Sample Mineral 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 ...
... Samples Sample Nature of Analytical data ( in ppm ) No. Sample Mineral 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 ...
Page 57
... samples were also subjected to similar studies , the results of which are given in Table - VI . - A perusal of the Table VI shows that some of the samples , both in magnetic and non - magnetic fractions suggest direct correlation ...
... samples were also subjected to similar studies , the results of which are given in Table - VI . - A perusal of the Table VI shows that some of the samples , both in magnetic and non - magnetic fractions suggest direct correlation ...
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