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 20
... samples , collected along and across strike di- rection of the exposed ore body at regular intervals between 10 and 20 m depending upon the dimension of the outcrops , the average com- position of the magnetite is computed to be as ...
... samples , collected along and across strike di- rection of the exposed ore body at regular intervals between 10 and 20 m depending upon the dimension of the outcrops , the average com- position of the magnetite is computed to be as ...
Page 21
... samples show the following features : Magnetite grains range in size from 50-150 micron but grains of 100-150 microns size are also common . Entire chromium in the sample is derived from the discrete chromite grains which are intimately ...
... samples show the following features : Magnetite grains range in size from 50-150 micron but grains of 100-150 microns size are also common . Entire chromium in the sample is derived from the discrete chromite grains which are intimately ...
Page 34
... Samples collected Along Lohit Expedition Route S1 . Sample No. Ca0 % Mg0 % No. Insolu- ble 08/0 P2038 Locality 1 . LEB - 23 50.96 0.80 6.93 0.55 Chipru 2 . LEB - 450 52.64 0.80 4.00 0.79 Chanli 3 . 50.43 1.31 3.55 0.82 Tiddingl 4 ...
... Samples collected Along Lohit Expedition Route S1 . Sample No. Ca0 % Mg0 % No. Insolu- ble 08/0 P2038 Locality 1 . LEB - 23 50.96 0.80 6.93 0.55 Chipru 2 . LEB - 450 52.64 0.80 4.00 0.79 Chanli 3 . 50.43 1.31 3.55 0.82 Tiddingl 4 ...
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