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 15
... matrix . It has been postulated that the overall assemblage represents a product of crystal fractination affected by gravitational settling which were intruded later by a magma of diffe- rent composition forming matrix to the fractured ...
... matrix . It has been postulated that the overall assemblage represents a product of crystal fractination affected by gravitational settling which were intruded later by a magma of diffe- rent composition forming matrix to the fractured ...
Page 21
... matrix associated with it . It could thus be postulated that part of the total Ni content of the magnetic fraction is contributed by the volcanic matrix material . ( iii ) there is not much difference in analytical data beyond 75 micron ...
... matrix associated with it . It could thus be postulated that part of the total Ni content of the magnetic fraction is contributed by the volcanic matrix material . ( iii ) there is not much difference in analytical data beyond 75 micron ...
Page 23
... matrix varies from 20 to 80 micron . Genesis The data presented here suggest that the magnetite with the ultramafics ... matrix . which accounts for 90 % of the Ni and Co content of the ore as shown by the separation of matrix and ...
... matrix varies from 20 to 80 micron . Genesis The data presented here suggest that the magnetite with the ultramafics ... matrix . which accounts for 90 % of the Ni and Co content of the ore as shown by the separation of matrix and ...
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