Records of the Geological Survey of India, Volume 129, Part 5Government of India, 1994 - Geology Includes the "Annual report of the Geological Survey of India," 1867- |
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Page 28
... sulphides include pyrite , chalcopyrite and rarely pyrrhotite . Gold occurs as discrete grains ( upto 500 microns ) in native form and is also as- sociated with sulphides . Chloritisation , silicification , epidotisation ...
... sulphides include pyrite , chalcopyrite and rarely pyrrhotite . Gold occurs as discrete grains ( upto 500 microns ) in native form and is also as- sociated with sulphides . Chloritisation , silicification , epidotisation ...
Page 81
... sulphides in different BIF bands varies from band to band and also from place to place . Sulphides are seen as disseminations of fine to coarse and at places are aligned parallel to bed- ding planes . The analytical results of 261 ...
... sulphides in different BIF bands varies from band to band and also from place to place . Sulphides are seen as disseminations of fine to coarse and at places are aligned parallel to bed- ding planes . The analytical results of 261 ...
Page 248
... sulphides ( 5 to 30 % ) . The rock is well banded comprising quartz layers alternating with 1 mm to 1 cm thick layers of amphiboles with or without magnetite , calcite and sulphides . In hand specimen , the sulphides seen are ...
... sulphides ( 5 to 30 % ) . The rock is well banded comprising quartz layers alternating with 1 mm to 1 cm thick layers of amphiboles with or without magnetite , calcite and sulphides . In hand specimen , the sulphides seen are ...
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Common terms and phrases
acid volcanics amphibolite ANANTAPUR DISTRICT ANDHRA PRADESH anomaly zones anorthosite assessment auriferous banded iron formation beach ridges bedrock beds BIF bands biotite biotite gneiss block boreholes carried charnockite chert Chitradurga clay delineated deposits depth Dharwar dips dolerite drilling dykes east eastern emplaced ENE-WSW excavated exposed field season folds foliation foundation gabbro geochemical GEOLOGICAL MAP geophysical geotechnical investigations gneiss Gneissic gold mineralisation granite gneiss granulite gravity grey grout hornblende INDEX indicated intrusives joints KARNATAKA KERALA kimberlite laterite lignite limestone lineament located mafic magnetic metabasalt migmatites mineral mineralised zones NE-SW NNW-SSE NW-SE occur overburden pegmatite Plate power house PROJECT pyrite quartz quartz veins quartzite regional reservoir river rock types samples scale schist belt schistose sediments shear zone slope soil southern spillway sq km strike length structural studies sulphides surveys TAMIL NADU thickness traversed trenching trending tunnel ultramafic upto vertical weathered width