Records of the Geological Survey of IndiaThe Survey, 1986 - 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
... Chromite occurs as isolated circular grains ( 9.14 - 21.00 vol % ) often rimmed by ma- gnetite . Weak martitisation along fractures in chromite is also noticed . Both the martitised magnetite and chromite occur as float in a chloritic ...
... Chromite occurs as isolated circular grains ( 9.14 - 21.00 vol % ) often rimmed by ma- gnetite . Weak martitisation along fractures in chromite is also noticed . Both the martitised magnetite and chromite occur as float in a chloritic ...
Page 23
... chromite . The size of the Ni bearing patches within goethite matrix varies from 20 to 80 micron . Genesis The data presented here suggest that the magnetite with the ultramafics represents a cumulate section associated with the ...
... chromite . The size of the Ni bearing patches within goethite matrix varies from 20 to 80 micron . Genesis The data presented here suggest that the magnetite with the ultramafics represents a cumulate section associated with the ...
Page 24
... chromite . Chromite CHROMITE Plate 3.8 Absorbed current image showing chromite grains with dentate boundary , 200 x 200 Plate 3.9 Absorbed current image showing zoning of chromite , 200 X 200 . Hematite Plate 3.10 Absorbs current image ...
... chromite . Chromite CHROMITE Plate 3.8 Absorbed current image showing chromite grains with dentate boundary , 200 x 200 Plate 3.9 Absorbed current image showing zoning of chromite , 200 X 200 . Hematite Plate 3.10 Absorbs current image ...
Contents
PETROLOGY AND CHEMISTRY OF LEUCOCRATIC ROCKS FROM NAGA | 1 |
BLUE SCHISTS C TYPE ECLOGITES AND GARNET BEARING MAFIC | 7 |
THE NICKELIFEROUS MAGNETITE ASSOCIATED WITH THE NAGA | 15 |
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Abor Volcanics albite amphibolite antiform Arunachal Pradesh assemblage basin blue schists calcite Chattopadhyay cherty chlorite chromite coarse colour column Dalbuing Delai river deposits diamictite Disang Formation East Siang district eclogites Eocene epidote facies feldspar float boulders folding foliation foot hills fossils garnet Geol Geological Survey glaucophane gneiss Gondwana grey greyish Hills ophiolite belt hills/ridges Himalaya hornblende host rock Hunli intercalations Ithun valley limestone Lohit Lower mafic mafic segregations magnetite magnetite body Manipur margin matrix medium grained metamorphism mineral Miri Formation Miri Group Naga Hills Naga Hills ophiolite Nagaland nala NE-SW Nummulitic occur oligomictic conglomerate Olistostromal opaques ophiolite Permian phyllite plagioclase plagiogranite Plate quartz quartzite Radiolaria region samples sandstone schist schist band schistose sedimentaries sediments sequence serpentinites shale shows sillimanite siltstone Singh structure Surv Survey of India tectonic thick thin Tidding trending Ukhrul ultramafics Upper upto veins Vidyadharan white quartzite Yinkiong zone