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 3
... vein type sulphides are that the veins are essentially comprised of softer sulphide minerals ( Plate . IV , Fig . 1 ) , such as , sphalerite , galena and pyrrhotite in the form of mono - mineralic / bi - minera- lic / poly - mineralic veins ...
... vein type sulphides are that the veins are essentially comprised of softer sulphide minerals ( Plate . IV , Fig . 1 ) , such as , sphalerite , galena and pyrrhotite in the form of mono - mineralic / bi - minera- lic / poly - mineralic veins ...
Page 24
... veins . K - feldspar ( perthite ) veins are common within a zone of feldspathic alkali pyroxenite developed along the inner margin of the complex . Carbonatite , mostly sovites , forms ovoid bodies , dykes and veins . Dolomitic ...
... veins . K - feldspar ( perthite ) veins are common within a zone of feldspathic alkali pyroxenite developed along the inner margin of the complex . Carbonatite , mostly sovites , forms ovoid bodies , dykes and veins . Dolomitic ...
Page 25
... veins in pyroxenite and serpentinite within a partial ring - like circular zone in the south- half of the complex ( Plate 3.04 ) . Thin ijolite veins are also common in the feldspathic border zone . Ijolites predominate over melteigite ...
... veins in pyroxenite and serpentinite within a partial ring - like circular zone in the south- half of the complex ( Plate 3.04 ) . Thin ijolite veins are also common in the feldspathic border zone . Ijolites predominate over melteigite ...
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