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 15
... pegmatites and to collect trench and bedrock samples for Au , Ag , rare earths and asso- ciated metals . A pegmatite - bearing zone extend- ing for 60 sq km length has been delineated and 310 cu m of trenching with collection of 728 ...
... pegmatites and to collect trench and bedrock samples for Au , Ag , rare earths and asso- ciated metals . A pegmatite - bearing zone extend- ing for 60 sq km length has been delineated and 310 cu m of trenching with collection of 728 ...
Page 47
... pegmatite or in colluvium derived from the pegmatite . The occurrences are sporadic and spread over large areas right from Araku val- ley in Visakhapatnam to Addatigala in East Godavari district . In all the areas examined in Araku and ...
... pegmatite or in colluvium derived from the pegmatite . The occurrences are sporadic and spread over large areas right from Araku val- ley in Visakhapatnam to Addatigala in East Godavari district . In all the areas examined in Araku and ...
Page 118
... pegmatite veins . Copper minerali- sation consisting of chalcopyrite , bornite and covellite are also seen in the form of stringers and disseminations in association with molybdenite flakes . The mineralised pegmatite body is about 200 ...
... pegmatite veins . Copper minerali- sation consisting of chalcopyrite , bornite and covellite are also seen in the form of stringers and disseminations in association with molybdenite flakes . The mineralised pegmatite body is about 200 ...
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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