Records of the Geological Survey of India, Volume 113, Parts 4-6The Survey, 1980 - Earthquakes Vols. 1- include Report of the Geological Survey, 1867- ; v. 32- include Review of the mineral production of India, 1898/1903- ; v. 75 consists of Professional papers, no. 1-16; v. 76 consists of Bulletins of economic minerals. |
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Page 85
... quartz and biotite in varying proportions and with varying grain dimensions , resulting into petrologi- cal ... quartz - schist , sillimanite - biotite ( cordierite ) -schist and sillimanite quartzite , all the three types showing ...
... quartz and biotite in varying proportions and with varying grain dimensions , resulting into petrologi- cal ... quartz - schist , sillimanite - biotite ( cordierite ) -schist and sillimanite quartzite , all the three types showing ...
Page 136
... quartz , muscovite and sericite embedded in the collophane or limonitic cement . At places the collophane has crystallized into microcrystallites showing grey polarization colours . Replacement of quartz by collophane is common . Small ...
... quartz , muscovite and sericite embedded in the collophane or limonitic cement . At places the collophane has crystallized into microcrystallites showing grey polarization colours . Replacement of quartz by collophane is common . Small ...
Page 143
... quartz mica greisens . The stratigraphic succession worked out for the area is given below : Quaternary Alluvium Intrusives Sakoli Group Laterite Quartz veins . Tourmaline / Quartz - mica greisen , < locale of tungsten mineralisation ...
... quartz mica greisens . The stratigraphic succession worked out for the area is given below : Quaternary Alluvium Intrusives Sakoli Group Laterite Quartz veins . Tourmaline / Quartz - mica greisen , < locale of tungsten mineralisation ...
Contents
Exploration for coal with particular reference to Tertiary coalfields of North Eastern India | 1 |
Problems of correlation of PreGondwana rock units of Arunachal Pradesh and adjoining areasa review | 15 |
The Sung Valley alkaline ultramafic carbonatite complex East Khasi and Jaintia Hills districts Meghalaya 24 | 24 |
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Common terms and phrases
alluvium anorthosite assemblage associated augite bands basalt flows basin beds belt biotite Bombay bore holes borehole breccia calcite carbonatite Charnockite chert chlorite chromite clay clinopyroxene coal complex Deccan Trap deposits developed district drainage drilling dykes fault felspar fluorite folds Formation fossil fragments geochemical Geol Geological Survey geomorphic gneisses Gondwana grade grains granite granulites greisens grey groundmass Group hills Himalayas ijolite indicated intrusive laterite layers limestone magnetite Manipur mapping metamorphic metres migmatites mineralisation minerals Narmada NW-SE occur olivine ophiolite phenocrysts phosphorite phyllite plagioclase Plate porphyritic Pradesh present pyroclastic pyroxene pyroxenite quartz quartz veins quartzite region river rocks samples sandstone schist seam sedimentary sediments sequence serpentinite shale sillimanite soil stratigraphic structure studies sub-surface surface Surv Survey of India Tapti tectonic thickness thin tion trending tuff ultramafic Unpublished GSI Report upto Vaghur valley volcanic zone