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Mishra, K. S.
- Proterozoic Iron Oxide (Cu-Ni-U-REE) Type Mineralisation in the Environs of Dalma Volcanics, West Singhbhum District, Bihar. A New Horizon for Exploration of Polymetallic Ores
Abstract Views :189 |
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Authors
Affiliations
1 Atomic Minerals Division, Jamshedpur-831 002, IN
2 Atomic Minerals Division, Hyderabad-500 016, IN
1 Atomic Minerals Division, Jamshedpur-831 002, IN
2 Atomic Minerals Division, Hyderabad-500 016, IN
Source
Journal of Geological Society of India (Online archive from Vol 1 to Vol 78), Vol 54, No 5 (1999), Pagination: 491-494Abstract
Significant uranium geochemical anomalies associated with Cu, Ni, REE, Au indicative of favourable Iron oxide breccia type of mineralisation has been located along a sympathetic faulted zone close to the main fault along the northern contact of Dalma volcanic range. The assemblages of the rocks found north of Dalma volcanics viz., carbon phyllite, carbonaceous quartzite, calc-arenite and cherty quartzite are indicative of typical marine environment of lower to middle Proterozoic age traceable for about 10 km over a 3-7 km wide zone. The mineralisation represented by iron oxide breccia is confined to a major structural zone parallel to a regional strike fault and is cut across by transverse faults. Significant anomalous concentration of U3O8 (140-770 ppm), Cu (173-498 ppm), Ni (148-1566 ppm), Au (<0.25 to 1.6 ppm), Ag (1.2 to 4.29 ppm) and REE (Y 131 to 607 ppm, La <50 to 993 ppm, Ce 41 to 91 ppm) points to its economic potentiality. The geological characteristics and tectonic set-up are akin to the major iron oxide (Fe-Cu-Ni/U-REE-Au) type of deposits reported elsewhere in the world. Investigation on the economic potentiality of the mineralisation is under progress.Keywords
Economic Geology, Polymetallic Mineralisation, Dalma Metavolcanics, Iron Oxide Breccia, Singhbhum Craton, Bihar.- New Occurrence of Mangano-Columbite from Late Proterozoic Pegmatites of Bhurpidungri, Jharsuguda District, Orissa
Abstract Views :169 |
PDF Views:114
Authors
Affiliations
1 Hyderabad - 500 016, IN
1 Hyderabad - 500 016, IN
Source
Journal of Geological Society of India (Online archive from Vol 1 to Vol 78), Vol 71, No 4 (2008), Pagination: 591-593Abstract
No Abstract.- Rb-Sr Geochronology and Petrochemistry of the Granitoids Hosting Rare Element Pegmatites, Jharsuguda District, Orissa
Abstract Views :187 |
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Authors
Affiliations
1 Atomic Minerals Directorate for Exploration & Research, CR, Nagpur - 440001, IN
2 Atomic Minerals Directorate for Exploration & Research, Hyderabad - 500016, IN
1 Atomic Minerals Directorate for Exploration & Research, CR, Nagpur - 440001, IN
2 Atomic Minerals Directorate for Exploration & Research, Hyderabad - 500016, IN
Source
Journal of Geological Society of India (Online archive from Vol 1 to Vol 78), Vol 69, No 1 (2007), Pagination: 61-64Abstract
Whole-Rock isochron dating of granite gneiss, hosting rare element-Bearing pegmatites from Jharsuguda district, Orissa defines an isochron age of 2762±±200Ma with initial 87Sr/86Sr ratio of 0.7082 ± 0.0027 (MSWD = 36.8). High 87Sr/86Sr ratio indicates involvement of crustal source for its formation. Petrography of the granitoids characterizes them as 'hornblende granite gneiss'. The ASI of the granite gneiss reveals its meta-Aluminous nature. It is a significant host to the zoned and complex type of 'Rare Elements-Bearing Pegmatites' , containing columbite-Tantalite (oxide of Nb + Ta) and beryl. Based on the whole-Rock isochron data, the granite gneiss of the Jharsuguda area can be equated with the Bamra and Tamparkola granite and phase III of the Singhbhum granite. Further, it postdates the Bonai and Kaptipada granite but is older to the Nilgiri and Ramapahari granite, with all these forming part of the Singhbhum North Orissa Craton.Keywords
Rb-Sr Geochronology, Granite Gneiss, Rare Metals, Jharsuguda, Orissa.- New Occurrence of Manganocolumbite from Late Proterozoic Pegmatites of Bhurpidungri, Jharsuguda District, Orissa
Abstract Views :203 |
PDF Views:172
Authors
Affiliations
1 Atomic Minerals Directorate for Exploration and Research, Department of Atomic Energy, Civil Lines, Nagpur - 440 001, IN
2 Atomic Minerals Directorate for Exploration and Research, Department of Atomic Energy, Begumpet, Hyderabad - 500 01 6, IN
1 Atomic Minerals Directorate for Exploration and Research, Department of Atomic Energy, Civil Lines, Nagpur - 440 001, IN
2 Atomic Minerals Directorate for Exploration and Research, Department of Atomic Energy, Begumpet, Hyderabad - 500 01 6, IN
Source
Journal of Geological Society of India (Online archive from Vol 1 to Vol 78), Vol 66, No 2 (2005), Pagination: 141-144Abstract
Manganocolumbite in the pegmatites of Bhurpidungri(Lat: 21°51'30": Long: 84°15'52", T.S.No.73C/5) in the Jharsuguda district of Orissa is reported for the first time from the pegmatites of India. It contains upto 18.46% MnO, with an average (n=8) of 14.52% MnO, 7.26% FeO(T), 60.18% Nb2O5 and 14.33% Ta2O5. A swarm of pegmatites is exposed, intruding at the contact of granite gneiss and amphibolite/Charnockite near the Bhurpidungri village. These pegmatites are well-Zoned with prominent quartz core, intermediate zone and wall zone. About 4 tonnes of manganocolumbite has been estimated in the gravels of these pegmatites for exploitation. Apart from this, beryl is also found in sufficient quantity.Keywords
Manganocolumbite, Pegmatites, Jharsuguda District, Orissa.- REE Geochemistry of Uranium-Bearing Columbite-Tantalites and Multiple Oxide Phases from Proterozoic Rare Metal Pegmatites of Pandikimal and Adjoining Areas, Jharsuguda District, Orissa
Abstract Views :178 |
PDF Views:2
Authors
Affiliations
1 AMD, CR, Nagpur - 440 001, IN
2 AMD, Hyderabad-500 016, IN
1 AMD, CR, Nagpur - 440 001, IN
2 AMD, Hyderabad-500 016, IN