Records of the Geological Survey of IndiaThe Survey, 1930 - 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 246
... pegmatites traversing mica - schists . It does not stand to reason that all pegmatites which traverse mica- schists are worth exploiting . They are not . Each pegmatite varies in the value of its marketable mica - content and the latter ...
... pegmatites traversing mica - schists . It does not stand to reason that all pegmatites which traverse mica- schists are worth exploiting . They are not . Each pegmatite varies in the value of its marketable mica - content and the latter ...
Page 247
... pegmatites near the actual contact with the schists , either on the hanging - or foot - wall side . Large crystals of garnet occur in about the same situation while tourmaline is common in the margin and in the quartz core . Apatite in ...
... pegmatites near the actual contact with the schists , either on the hanging - or foot - wall side . Large crystals of garnet occur in about the same situation while tourmaline is common in the margin and in the quartz core . Apatite in ...
Page 251
... pegmatite and the enclosing schists . In some cases the pegmatites are known to form simple lenses in the schists entirely unconnected with any larger mass of pegmatite . Many of the larger pegmatites have been proved to have no connec ...
... pegmatite and the enclosing schists . In some cases the pegmatites are known to form simple lenses in the schists entirely unconnected with any larger mass of pegmatite . Many of the larger pegmatites have been proved to have no connec ...
Contents
DETAILED ACCOUNT OF THE MINERALS OF GROUP I | 26 |
B 2 | 43 |
Magnesite Salem district Uses Production Other occur | 122 |
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acid alumina amount analyses annual output Assam average annual Balaghat barytes bauxite Bengal Bihar Bihar and Orissa Bombay Burma Calcutta cassiterite cent Central India Central Provinces clay coal Company contain copper corundum countries crystals cwts deposits Dharwar district E. H. PASCOE exports feet figures furnace Gangpur Geol gonditic grade granite hæmatite hills imports increase India Indian mica iron and steel jadeite kyanite lime limestone long tons Madras magnesite manga manganese manganese-ore manganiferous iron-ores manufacture material Mergui Mergui district mica miles million gallons mineral mines Mysore Nagpur Northern Shan obtained occur ore-bodies Orissa oxide pegmatites period under review petroleum phosphorus ports production Punjab Quan Quantity quarries quartz quinquennial period quinquennium railway Rajputana rocks salt sands Sandur schists shales silica sillimanite silver Singhbhum stone sulphate sulphur supply Surv TABLE Tavoy tion tity tons valued United veins wolfram world's Yamethin zinc