Records of the Geological Survey of India, Volume 114Geological Survey of India, 1984 - Earthquakes 1867- includes the "Annual report of the Geological survey of India". |
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Page 1
... gold within vein - quartz as well as in stream sediments were reported since ancient times from many localities of Ranchi and Singhbhum districts , Bihar . Gold content in some quartz - reefs cutting across the Precambrian meta ...
... gold within vein - quartz as well as in stream sediments were reported since ancient times from many localities of Ranchi and Singhbhum districts , Bihar . Gold content in some quartz - reefs cutting across the Precambrian meta ...
Page 6
... gold in different types of. generally consists of euhedral to subhedral chromite , Mn- oxides , tourmaline , pyroxene , amphibole , etc. Occasionally lighter minerals like feldspar and quartz are found to remain attached with the heavies ...
... gold in different types of. generally consists of euhedral to subhedral chromite , Mn- oxides , tourmaline , pyroxene , amphibole , etc. Occasionally lighter minerals like feldspar and quartz are found to remain attached with the heavies ...
Page 8
... gold . Absence of gold in these samples may be accounted to the non- availability of fresh in - situ vein - quartz in the present level of erosion . Bulk sampling of the vein - quartz in the order of a few tons may possibly give better gold ...
... gold . Absence of gold in these samples may be accounted to the non- availability of fresh in - situ vein - quartz in the present level of erosion . Bulk sampling of the vein - quartz in the order of a few tons may possibly give better gold ...
Contents
Integrated Geochemical Approach for Tracing Gold Mineralisation in Parts | 1 |
On Jacobsites from Vizianagaram Manganese Belt of Eastern Ghats Andhra | 15 |
Fossil Hippopotamus from Quaternary Alluvial Deposits of Narmada Valley | 17 |
Copyright | |
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Common terms and phrases
actinolite amphiboles amphibolite analysis ARCHAEAN assemblage associated BANKURA DISTRICT Barakar basement bedrock samples Bihar Biotite boreholes catchment area Chakradharpur chemical colour composition country rocks crystals Dassarma Dolerite Domuhan river Dubrajpur Dubrajpur Formation Electron elements epidiorites geochemical Geol Geological Survey Ghose gneiss Goilkera gold grains Granite gneiss green GSI Type Haast river Hippopotamus hornblende hornblende schist host rock igneous jacobsite Kharswan strip Khatangi hill section magnetite manganese Manuscript received massive amphibolite Mayapur McCluskieganj meta-basic rocks metamorphic metres south mica schists mineralisation minerals namadicus Narmada Neogene nepheline syenite occur palaeindicus Pegmatite pelite phyllites plagioclase Porphyritic present area quartz Quartzite Quaternary ratios Rupatganj schist schistose schistose amphibolite sediments shale Singhbhum Singhbhum Shear Zone specimens stratigraphic stream sediment-concentrate samples sulphide Surv Survey of India Table-II Talapatra texture three strips values vein-quartz veins West Bengal X-Ray