Records of the Geological Survey of India, Volume 129, Parts 2-3The Survey, 1998 - 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 164
... minerals are concentrated more in -60 to + 120 and -120 to + 230 ASTM mesh fractions . In the second sector , the ... minerals decreases seaward . More than 90 % of minerals in heavy fractions comprise economic minerals , viz . ilmenite ...
... minerals are concentrated more in -60 to + 120 and -120 to + 230 ASTM mesh fractions . In the second sector , the ... minerals decreases seaward . More than 90 % of minerals in heavy fractions comprise economic minerals , viz . ilmenite ...
Page 169
... minerals . , though the percentage is very low . Other heavy minerals present in the sample include epidote / zoisite , hornblende and actinolite / tremolite . These assemblages are typical of the low grade metamorphic terrains like the ...
... minerals . , though the percentage is very low . Other heavy minerals present in the sample include epidote / zoisite , hornblende and actinolite / tremolite . These assemblages are typical of the low grade metamorphic terrains like the ...
Page 170
... minerals at surface are also characterised by higher concentrations at depth . More than 90 % of minerals in heavy fractions comprise economic minerals , viz . ilmenite , leucoxene , rutile , zircon , monazite , sillimanite and garnet ...
... minerals at surface are also characterised by higher concentrations at depth . More than 90 % of minerals in heavy fractions comprise economic minerals , viz . ilmenite , leucoxene , rutile , zircon , monazite , sillimanite and garnet ...
Contents
Stratigraphy Division | 11 |
Central Petrological Laboratories | 26 |
Geodata and Database Division | 43 |
Copyright | |
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acid volcanics aeromagnetic amphibolite anomaly bands Barakar Barakar Formation Barren Measure basemetal basic basin belt Bhutan Bihar biotite block boreholes charnockite Chhotanagpur clay coal seams Coalfield coarse Code core covered depth district Division drilling dykes east eastern faults field season foliation geochemical GEOLOGICAL MAP geophysical GEOTECHNICAL INVESTIGATION Ghosh gneiss gneissic gold Gondwana grade grained granite granite gneiss grey ground evaluation heavy minerals India indicated intersected intrusives Kamthi laterite limestone lineament located magnetic mica schist migmatite mineralisation nala NW-SE occur Orissa OVERVIEW pegmatite phyllite plagioclase Pradesh programme Project Proterozoic Purulia Purulia district quartz quartz veins quartzite Raniganj REGIONAL EXPLORATION river samples sand sandstone scale schist seam zones sector sediments sequence shale shear zone Sikkim Singhbhum southern sq km sq.km STAGE GEOTECHNICAL INVESTIGATION strike length structure sulphide surface survey Talchir terrain thickness tion Toposheet trending ultramafic upto varies West Bengal