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 139
... dykes trending NW - SE and NE - SW are also noticed . The cross - cutting relationship of these dykes indi- cates that the WNW - ESE dyke system is older than the N - S / NE - SW system . Strikingly , they do not show any conspicuous ...
... dykes trending NW - SE and NE - SW are also noticed . The cross - cutting relationship of these dykes indi- cates that the WNW - ESE dyke system is older than the N - S / NE - SW system . Strikingly , they do not show any conspicuous ...
Page 141
... dykes were emplaced along the major deep crustal frac- tures developed extensively in the northern Tamil Nadu . The intense shearing and mylonitisation shown by the N - S dykes could be attributed to re- activation of the N - S to NE ...
... dykes were emplaced along the major deep crustal frac- tures developed extensively in the northern Tamil Nadu . The intense shearing and mylonitisation shown by the N - S dykes could be attributed to re- activation of the N - S to NE ...
Page 144
... Dykes em- placed within charnockite are generally dark , me . dium to fine - grained , brown based with less ad- mixture of country rock , less inherited defects but more of acquired defects . Dykes in granite gneiss are less dark to ...
... Dykes em- placed within charnockite are generally dark , me . dium to fine - grained , brown based with less ad- mixture of country rock , less inherited defects but more of acquired defects . Dykes in granite gneiss are less dark to ...
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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