Records of the Geological Survey of India, Volume 112, Parts 7-8Government of India, 1981 - Earthquakes Includes the "Annual report of the Geological Survey of India," 1867- |
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Page 33
... altered andesite . It is fine- grained and greenish - grey in colour . Microscopi- cally , it is porphyritic , with highly altered pheno- crysts of plagioclase ( < An50 ) and pseudomorphs of chlorite , epidote and clinozoisite after ...
... altered andesite . It is fine- grained and greenish - grey in colour . Microscopi- cally , it is porphyritic , with highly altered pheno- crysts of plagioclase ( < An50 ) and pseudomorphs of chlorite , epidote and clinozoisite after ...
Page 61
... altered , whereas in the middle part of the valley , around August- muni , Sauri and Rampur , these minerals are mode- rately altered ; and further downstream , in the flu- vial terraces the alteration seems to be negligible . These ...
... altered , whereas in the middle part of the valley , around August- muni , Sauri and Rampur , these minerals are mode- rately altered ; and further downstream , in the flu- vial terraces the alteration seems to be negligible . These ...
Page 30
... altered euhedral plagioclase ( albite ) , perthite microcline , anhedral quartz , chlorite and secondary ... altered and in microper- thitic intergrowth ; the alteration has yielded sericite and kaolin . Quartz is in predominant amount ...
... altered euhedral plagioclase ( albite ) , perthite microcline , anhedral quartz , chlorite and secondary ... altered and in microper- thitic intergrowth ; the alteration has yielded sericite and kaolin . Quartz is in predominant amount ...
Contents
RECORDS | 1 |
Geology Structure and Sulphide Mineralisation of Tosham District Bhiwani Haryana | 7 |
Geology and Geochemistry of Sulphide Mineralisation in Teejanwali Hill Mahendragarh | 17 |
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Ajabgarh albite altered anomaly Aravalli Banded Gneissic Complex Bari Sadri basin Bayana beds belt Berach Berach Granite Bhadesar biotite calcite chert chlorite colour conglomerate country rocks crystalline Delhi Supergroup Deoban deposits district dolomite east eastern epidote fault felspar fluvial folds foliation Formation fractures Geol Geological Survey glacial glacier gneiss grade grains granite grey groundmass Himalaya hornblende intrusive Jamuna Jogipura Jutogh kankar limestone magmatic magnetite Mandhali metamorphism metasediments metres mica schist microcline migmatites mineralisation minerals muscovite NE-SW Nithar NW-SE occur oligoclase orthoclase overlying pebbles pegmatite phase phenoclasts phyllite places plagioclase Plate-1 porphyry Pre-Aravalli pre-Delhi Purola quartz quartzite Rajasthan region rhyolite river samples sand Sandstone schist schistose sediments seen sequence sericite shale shows slate sphene stratigraphic Sub-basin Supergroup surface Surv Survey of India tectonic terraces texture thick thin Thrust Tosham trend tuff unconformity valley veins Vindhyan Volcanics Wazri zircon zone