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 19
... mainly of biotite and quartz respective- ly ; exhibits flow folds , ptyg- matic folds . Amphibolite U / L Foliated granite interbedded with quartzite beds ranging in thick- ness from a few centimeters to 80 meters ; gneissic at places ...
... mainly of biotite and quartz respective- ly ; exhibits flow folds , ptyg- matic folds . Amphibolite U / L Foliated granite interbedded with quartzite beds ranging in thick- ness from a few centimeters to 80 meters ; gneissic at places ...
Page 27
... mainly composed of apatite , magnetite , calcite and clinopyroxenes . This rock is similar in mineralogy to aegiapite , described from elsewhere . The alkaline dykes are confined along the Nongchram fault and related fractures in its ...
... mainly composed of apatite , magnetite , calcite and clinopyroxenes . This rock is similar in mineralogy to aegiapite , described from elsewhere . The alkaline dykes are confined along the Nongchram fault and related fractures in its ...
Page 48
... mainly sulphides ( pyrite , chalcopyrite ) and oxides ( magnetite ) occurring as discrete clots / patches . Locally , they are interfolial in nature . Staurolite - garnet - muscovite - biotite - chlorite - quartz schist : This unit has ...
... mainly sulphides ( pyrite , chalcopyrite ) and oxides ( magnetite ) occurring as discrete clots / patches . Locally , they are interfolial in nature . Staurolite - garnet - muscovite - biotite - chlorite - quartz schist : This unit has ...
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