Records of the Geological Survey of India, Volume 113, Parts 2-4Government of India, 1983 - Geology Includes the "Annual report of the Geological Survey of India," 1867- |
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Page 7
... quartz indicates that the rock is saturated with silica and the absence of a co - existing carbonate mineral suggests that the lowermost metamor- phic facies is the upper greenschist facies ( Turner , 1968 ) . Hornblende - schist and ...
... quartz indicates that the rock is saturated with silica and the absence of a co - existing carbonate mineral suggests that the lowermost metamor- phic facies is the upper greenschist facies ( Turner , 1968 ) . Hornblende - schist and ...
Page 12
... quartz are com- monly observed . In the kyanite - quartz rock the percen- tage of the former ranges between 20-25 % . Besides kyanite , the schists contain staurolite , garnet , mica , quartz sericite , felspar and corundum . Pitting ...
... quartz are com- monly observed . In the kyanite - quartz rock the percen- tage of the former ranges between 20-25 % . Besides kyanite , the schists contain staurolite , garnet , mica , quartz sericite , felspar and corundum . Pitting ...
Page
... quartz veins when analysed showed no gold value . Such milky white quartz veins , devoid of mineralisation are also present in the adjoining quartz - sericite schist . Simultaneous with chloritisation of the host rock , possibly ...
... quartz veins when analysed showed no gold value . Such milky white quartz veins , devoid of mineralisation are also present in the adjoining quartz - sericite schist . Simultaneous with chloritisation of the host rock , possibly ...
Contents
A Probable Zone of Carbonatite and Fenitic Rock Association | 7 |
Quantitative Correlation of Cyclic Stratigraphic Sequences | 17 |
On the Fossiliferous Ordovician Rocks of Black Mountain | 35 |
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alkali anomaly apatite Arunachal assemblage associated axial bands Beldih belt Bhutan Bihar biotite bore holes borehole Carbonaceous carbonatite Chaibasa chert chlorite chlorite schist chromite coal seam Coarse sandstone complex contours correlation Dalma Deccan basalts deformation deposits depth developed Dhanjori district Dubrajpur Dubrajpur Formation Eastern exploration F₁ fault feldspars folds foliation fossils geochemical Geol Geological Survey Ghosh gneiss Gondwana grade grains granite gneiss grey Group Hills Himalaya host rock ijolite limestone lineation magnetite Manipur Medium sandstone metamorphism metres migmatites mineralisation minerals muscovite nepheline Northern Shear Zone occur olivine ophiolite phyllites plagioclase Plate plunging Pradesh Precambrian pyrite quartz quartzite regional rock types S₁ S₂ samples sandstone Sarkar schist schistosity sector sedimentary sequence sericite serpentinite shale sillimanite Singhbhum stratigraphic structural studies sulphide Surv Survey of India tectonic texture thickness tholeiites tion trending ultramafic upto veins volcanic