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
... reaction is assumed to be of a com- position intermediate between almandine and pyrope . Magne- sium is always present in natural staurolites and its cont- ents is usually appreciable ( Griffen and Ribbe , 1973 ) . Reaction ( i ) has ...
... reaction is assumed to be of a com- position intermediate between almandine and pyrope . Magne- sium is always present in natural staurolites and its cont- ents is usually appreciable ( Griffen and Ribbe , 1973 ) . Reaction ( i ) has ...
Page 22
Geological Survey of India. Reaction ( i ) represents a higher metamorphic grade than the above reaction ( Winkler , 1975 and Table - 2 ) and thus the Pressure - Temperature conditions for reaction ( i ) have been interpreted as higher ...
Geological Survey of India. Reaction ( i ) represents a higher metamorphic grade than the above reaction ( Winkler , 1975 and Table - 2 ) and thus the Pressure - Temperature conditions for reaction ( i ) have been interpreted as higher ...
Page 23
... reaction , suggests a tie - line switch from staurolite + biotite to cordierite + garnet with the pressure ... ( reactions ii and iii ) . The retrograde reactions producing chlorite started between 500 - 570 C at 2 kb and 5.5 kb PH , 0 ...
... reaction , suggests a tie - line switch from staurolite + biotite to cordierite + garnet with the pressure ... ( reactions ii and iii ) . The retrograde reactions producing chlorite started between 500 - 570 C at 2 kb and 5.5 kb PH , 0 ...
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