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 25
... appear to have been widely replaced . Pyroxenite rafts within the uncompahgrite are recry- stallised into a very coarse - grained rock . Reaction rim around pyroxene in hand specimen scale is common . , Ijolite veins frequently cut ...
... appear to have been widely replaced . Pyroxenite rafts within the uncompahgrite are recry- stallised into a very coarse - grained rock . Reaction rim around pyroxene in hand specimen scale is common . , Ijolite veins frequently cut ...
Page 25
... appears to be due to extensive replacement of pyroxenite by ijolite giving rise to melteigite and alkali pyroxenite ... appear to be feldspathised ijolite . Almost monomineralic K - feldspar ( perthite ) veins and patches are common in ...
... appears to be due to extensive replacement of pyroxenite by ijolite giving rise to melteigite and alkali pyroxenite ... appear to be feldspathised ijolite . Almost monomineralic K - feldspar ( perthite ) veins and patches are common in ...
Page 31
... appear to be in part derived by melilitisation of pyroxenite , bulk of the melilite rock is distinctly of intrusive ... appears to be later introduced . However some carbonates which form coarse interlocking gra- ins in ijolite may be of ...
... appear to be in part derived by melilitisation of pyroxenite , bulk of the melilite rock is distinctly of intrusive ... appears to be later introduced . However some carbonates which form coarse interlocking gra- ins in ijolite may be of ...
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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Common terms and phrases
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