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 168
... tunnel between the two reservoirs has not been geologically favoured , GSI has recommended two independent power tunnels , one from Parson's Valley as originally proposed and another from Porthimund reservoir for consideration and the ...
... tunnel between the two reservoirs has not been geologically favoured , GSI has recommended two independent power tunnels , one from Parson's Valley as originally proposed and another from Porthimund reservoir for consideration and the ...
Page 185
... tunnel to be discharged into the Idukki reservoir to augment it for power generation . Driving of the tunnel is in progress from the exit side . The tunnelling medium is biotite gneiss , granite gneiss and gneissic charmokite . At the ...
... tunnel to be discharged into the Idukki reservoir to augment it for power generation . Driving of the tunnel is in progress from the exit side . The tunnelling medium is biotite gneiss , granite gneiss and gneissic charmokite . At the ...
Page 187
... TUNNEL 3 - D GEOLOGICAL LOG OF TUNNEL FROM CH : trend N 30 ° W to N 45 ° W - S 30 ° E to S 45 ° E and disposed 30 ° to 45 ° to the tunnel direction which is aligned near N - S . Three important sets of joints are present viz . , ( i ) ...
... TUNNEL 3 - D GEOLOGICAL LOG OF TUNNEL FROM CH : trend N 30 ° W to N 45 ° W - S 30 ° E to S 45 ° E and disposed 30 ° to 45 ° to the tunnel direction which is aligned near N - S . Three important sets of joints are present viz . , ( i ) ...
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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