Records of the Geological Survey of India, Volume 76, Part 10Geological Survey of India, 1942 - Earthquakes |
From inside the book
Results 1-3 of 11
Page 27
... period of vein formation , but was possible at any part of the long period of pegmatite formation . Although most pink felspar shows signs of replacement by albite , even in those pegmatites which occur in granite some of the potash ...
... period of vein formation , but was possible at any part of the long period of pegmatite formation . Although most pink felspar shows signs of replacement by albite , even in those pegmatites which occur in granite some of the potash ...
Page 29
... evidence . The facts suggest simple gradual crystallisation , with normal atten- dant reactions , during a single prolonged period of moving solutions . Madras .-- Mica deposits are worked in the Madras coastal OCCURRENCES . 29.
... evidence . The facts suggest simple gradual crystallisation , with normal atten- dant reactions , during a single prolonged period of moving solutions . Madras .-- Mica deposits are worked in the Madras coastal OCCURRENCES . 29.
Page 40
... period is 30 years . Originally mica leases in the Kodarma Reserved Forest were granted on a royalty basis of 5 per- cent of the pit's mouth value of the mica . For general conve- nience , both to Government and to the miners , an ...
... period is 30 years . Originally mica leases in the Kodarma Reserved Forest were granted on a royalty basis of 5 per- cent of the pit's mouth value of the mica . For general conve- nience , both to Government and to the miners , an ...
Other editions - View all
Common terms and phrases
2nd quality albite amount approximately average Bihar Bihar mica Black dotted Black spotted block and splittings block mica built-up mica Calcutta Canada cleavage condenser films condenser plates countries country rock crude mica dealers diopside district electrical exported block feet felspar Geological Survey Giridih grade granite ground mica Heavily stained 1st high quality mica India Indian mica insulation Intermediate stained J. A. Dunn Kodarma Kodarma Reserved Forest large number larger sizes Lepidolite loose splittings M. S. Krishnan Madagascar Madras mainly manufacture mica belt mica exported mica industry mica mining mica produced mica splittings mica trade mica-schists micanite microcline miles muscovite obtained pegmatites percentage phlogopite potash felspar pyroxenite quality block mica quartz quartz core Rajputana Rajputana mica recent recorded ruby mica schists scrap mica sheet mica Short tons smaller solutions South stained 1st quality stoping Survey of India Table 13 trimmed United uparchalla veins washers