Records of the Geological Survey of India, Volume 112, Part 3government of India., 1982 - Geology 1867- includes the "Annual report of the Geological survey of India". |
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Page 5
... Biotite from Granite Gneiss , Older Metam Biotite from Biotite granodiorit Rb / Sr . Isochron 6 samples Tonali Granodiorite , Orlajhori Biotite from biotite gneiss Muscovite from pegmatite Same Xenoliths : Hb . from hornblende schist ...
... Biotite from Granite Gneiss , Older Metam Biotite from Biotite granodiorit Rb / Sr . Isochron 6 samples Tonali Granodiorite , Orlajhori Biotite from biotite gneiss Muscovite from pegmatite Same Xenoliths : Hb . from hornblende schist ...
Page 23
... biotite - rich laminae alternate with biotite - poor laminae . Convolute lamination : This feature is seen in the upper parts of some of these sequences , mainly in the margins of the channels . The convolute laminations , well defined ...
... biotite - rich laminae alternate with biotite - poor laminae . Convolute lamination : This feature is seen in the upper parts of some of these sequences , mainly in the margins of the channels . The convolute laminations , well defined ...
Page 45
... biotite . Riebeckite is secondary after hornblende and occurs as elongate prismatic grains in shades of greenish blue . Conversion of hornblende to biotite and riebeckite suggests influx of potash and soda . Ilmenite shows marginal ...
... biotite . Riebeckite is secondary after hornblende and occurs as elongate prismatic grains in shades of greenish blue . Conversion of hornblende to biotite and riebeckite suggests influx of potash and soda . Ilmenite shows marginal ...
Contents
OF | 1 |
Some aspects of the geochemistry of Dhanjori Volcanics Singhbhum District | 7 |
Geology and Structure of Southern Gangpur Bonaigarh Region Sundargarh | 13 |
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Common terms and phrases
analysis andradite anomaly average axial plane Badampahar bands basaltic basin bauxite beds Bihar biotite calc-gneiss chalcopyrite channel chlorite cleavage Coalfield conglomerate deformation deposits Dhanbad district Dhanjori epidiorite district dolerite dykes eastern ENE-WSW epidiorite epidote F₁ facies fold fossils fractures Gangpur Gangpur Group garnet-rock Geol GEOLOGICAL SURVEY Geophysical gibbsite gneiss Godhur grains granite gneiss gravity Group-I Group-II rocks Group-III Hazaribagh Hazaribagh district hornblende host rock INDIA Records indicated kaolinite Karharbari Formation Keonjhar Khola Kusunda laterite lavas limb massive garnet metamorphic metavolcanic metres mica schists mineralisation minerals muscovite Nausahi North Karanpura occur Orissa pegmatite phyllite plagioclase Plate plunging quartz quartzite Rajgir Rangpo Region resistivity samples sandstone saprolite Sarkar scale schist schistose sedimentary sediments sequence sericite shales shear shows Singhbhum skarn southern stowed structures sulphide Surv SURVEY OF INDIA syncline synformal textural thickness traverse trend ultrabasic rock unstowed vein quartz volcanics