Records of the Geological Survey of India, Volume 122, Parts 2-4Geological Survey of India, 1987 - Earthquakes 1867- includes the "Annual report of the Geological survey of India". |
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Page 23
... granites are shown in Table I. Table : I Range in Rb and Sr contents ( ppm ) 40K / 40 Ar dating of biotite separates from two granite samples revealed ages of 457 ± 12 and 521 ± 14 Ma . Nongpoh Granite : Nongpoh granite is emplaced ...
... granites are shown in Table I. Table : I Range in Rb and Sr contents ( ppm ) 40K / 40 Ar dating of biotite separates from two granite samples revealed ages of 457 ± 12 and 521 ± 14 Ma . Nongpoh Granite : Nongpoh granite is emplaced ...
Page 29
... granite . The intrusive granitoids cover the fields of granodiorite , granite and quartz monzonite . Both Sukma granite gneisses and the migmatitic gneisses have variable major element composition . The SiO2 content varies from 69.0 to ...
... granite . The intrusive granitoids cover the fields of granodiorite , granite and quartz monzonite . Both Sukma granite gneisses and the migmatitic gneisses have variable major element composition . The SiO2 content varies from 69.0 to ...
Page 102
... granites and pegmatites belonging to Closepet Granite / Arcot Granite group . The chromite bands are seen as intermit- tant bodies in the anorthosite complex . A total of 82 samples were collected from these chromite bodies for ...
... granites and pegmatites belonging to Closepet Granite / Arcot Granite group . The chromite bands are seen as intermit- tant bodies in the anorthosite complex . A total of 82 samples were collected from these chromite bodies for ...
Contents
CENTRAL HEADQUARTERS 179 | 1 |
Geological Survey of India | 4 |
AIRBORNE MINERAL SURVEY AND EXPLORATION WING 80104 | 80 |
Copyright | |
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amphibolite AMSE Wing analysis Andaman anomalies assemblage bands Barakar Barakar Formation Barren Measures basin belt Bihar biotite block boreholes Calcutta clay coal seams Coal Wing COALFIELD Construction stage geotechnical cores correlation deposits depth district Division-II drilling dykes Eastern Engineering Geology evaluation exploration fault Feasibility stage folds geochemical geological mapping Geology Division geophysical geotechnical investigation Ghosh gneiss Gondwana grained granite granite gneiss grey Group heavy minerals horizon indicated Irrigation LANDSAT limestone lineaments located magnetic metamorphic mica migmatites mineralisation NW-SE occur Orissa pegmatite phyllite PRADESH quartz quartzite Raniganj Raniganj Formation regional river sand sandstone scale schist seam zones sector sediments shale shear zone Shillong sillimanite Singhbhum slope Special Investigation spillway sq km stage geotechnical investigation Stratigraphy strike length structure surface Survey of India thickness toposheet traverses trending Upper upto valley varies veins volcanics West Bengal