Records of the Geological Survey of India, Volume 76, Parts 9-14Government of India, 1947 - Geology Includes the "Annual report of the Geological Survey of India," 1867- |
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Page 43
... varies widely , hand sorting is resorted to in places , ore exported ranges from 32-60 per cent . Mn . Up to 30,000 tons of chemical ore have been exported in recent years . Total reserves of the various deposits have been estimated up ...
... varies widely , hand sorting is resorted to in places , ore exported ranges from 32-60 per cent . Mn . Up to 30,000 tons of chemical ore have been exported in recent years . Total reserves of the various deposits have been estimated up ...
Page 30
... varies from 70-90 per cent , depending on the size of the block and the extent of the flaws , but the average amount of S. D. B. produced is about 20-25 per cent . of the crude . The amount of S. D. B. cut per head per day varies from 4 ...
... varies from 70-90 per cent , depending on the size of the block and the extent of the flaws , but the average amount of S. D. B. produced is about 20-25 per cent . of the crude . The amount of S. D. B. cut per head per day varies from 4 ...
Page 22
... varies from grey to green , blue or black . Its density varies from 3.12 to 3.22 and it possesses a brilliant lustre . Its hardness is about 9.5 and is therefore only slightly less than that of diamond . Silicon carbide was discovered ...
... varies from grey to green , blue or black . Its density varies from 3.12 to 3.22 and it possesses a brilliant lustre . Its hardness is about 9.5 and is therefore only slightly less than that of diamond . Silicon carbide was discovered ...
Contents
GENERAL | 1 |
THE MODE OF OCCURRENCE | 8 |
Indian provincial production of manganese | 12 |
13 other sections not shown
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Common terms and phrases
abrasive albite alloys amount annual average B. C. Roy belt beryl Beryllium Bihar block mica Bombay braunite Brazil built-up mica Calcutta Canada cent Central Provinces chalcocite chalcopyrite cleavage colour condenser films containing copper copper deposits corundum countries crystals deposits occur district dressed mica electrical exports fair stained feet felspar ferromanganese garnet Geol Geological Survey gonditic granite Heavily stained important inches India insulation iron and steel iron-ores J. A. Dunn known Kodarma limestone lode M. S. Krishnan Madras mainly manganese manganese-ore manufacture metal mica industry mica-schists micanite miles million tons Mineral Resources mines muscovite Mysore obtained ore-bodies oxide pegmatites phlogopite plate production psilomelane pyrolusite quality block quality mica quartz Rajputana recent replacement rocks ruby Sandur schists sheet mica silicate Singhbhum sizes smelting South splittings sulphide surface Surv Survey of India Table thickness United vanadium veins world's