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Tripathi, Amitabh
- Chemistry of Eclogitic Garnets from Bahradih Kimberlite, Raipur District, Madhya Pradesh
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Authors
Affiliations
1 National Mineral Development Corporation Limited, Khanij Bhawan, Masab Tank, Hyderabad - 500 028, IN
2 Atomic Minerals Division, Begumpet, Hyderabad - 500 016, IN
1 National Mineral Development Corporation Limited, Khanij Bhawan, Masab Tank, Hyderabad - 500 028, IN
2 Atomic Minerals Division, Begumpet, Hyderabad - 500 016, IN
Source
Journal of Geological Society of India (Online archive from Vol 1 to Vol 78), Vol 56, No 4 (2000), Pagination: 425-430Abstract
Garnet concentrates from the Bahradih kimberlite pipe were analysed by electron microprobe and found to be mostly of the pyrope-almandine variety with significant amount of Na2O and a pyrope content in the range of 48.76-61.45%, almandine 30.82-41.97% and grossular 2.313-9.983%, indicating eclogitic paragenesis. Their Mg# ranges from 53.92 to 66.59. The presence of traces of Na and Ti in these garnets indicates that substitution of these elements into the garnet structure is feasible at high pressure. Five out of 50 garnets analysed from Bahmdih show Na2O = 0.07 wt.% which indicates that they are from the diamond stability field, as confirmed further by the recovery of diamonds from the pipe.Keywords
Kimberlite, Garnet, Pyrope, Almandine, Diamond, Raipur District, Madhya Pradesh.- Chemistry of Eclogitic Garnets from Bahradih Kimberlite, Raipur District, Madhya Pradesh
Abstract Views :187 |
PDF Views:158
Authors
Source
Journal of Geological Society of India (Online archive from Vol 1 to Vol 78), Vol 57, No 2 (2001), Pagination: 189-189Abstract
No Abstract.- Fluid Inclusions Associated with Gold Mineralization in Kunchiganahalu Banded Iron formation, Chitradurga Schist Belt, Karnataka: a Preliminary Appraisal
Abstract Views :241 |
PDF Views:3
Authors
Affiliations
1 National Mineral Development Corporation Ltd., Khanij Bhawan, Masab Tank, Hyderabad - 500028, IN
2 Department of Applied Geochemistry, Osmania University, Hyderabad - 500007, IN
1 National Mineral Development Corporation Ltd., Khanij Bhawan, Masab Tank, Hyderabad - 500028, IN
2 Department of Applied Geochemistry, Osmania University, Hyderabad - 500007, IN
Source
Journal of Geological Society of India (Online archive from Vol 1 to Vol 78), Vol 58, No 6 (2001), Pagination: 533-537Abstract
Three types of fluid inclusions i.e., Type I (C02-H2O) primary inclusions, trail- bound Type II biphase (H2O, L+V) inclusions and Type III monophase C02 inclusions associated within intra-granular fluid inclusion trails, have been observed in quartz veins associated with BIFs of Kunchiganahalu. For constraining the mobilization-deposition conditions in the high PT region, the isochore for Type I inclusions is drawn for the density of 0.86 gm/cm3 for a C02-H2O mixture with XCO2 of about 0.6. Type II inclusions are of low salinity (<2wt % NaCl equivalent) H2O variety with a density of 0.73 gm/cm3 Type III inclusions are of pure CO2 variety with a density of 0.81 gm/cm3. Conditions of the mobilizing fluid are approximated by the intersection of the upper temperature for the assemblage pyrite-arsenopyrite which is fixed at 491°C and may be considered as a minimum estimate, as this assemblage and the CO2-H2O isochore correspond to the Type I fluid inclusions. The main depositional condition is constrained through the intersection of the isochores for the low salinity H2O (Type II) and CO2 (Type III). The identified conditions are 1900±150 bars at 425±150°C.The modification of a parental CO2-H2O+-NaCl fluid during boiling resulted in the decrcase in the activity of reduced sulphur in the hydrothermal solution which ultimately led to gold precipitation.Keywords
Fluid Inclusions, Gold Mineralization, BIF, Kunchiganahalu, Chitradurga Belt, Karnataka, Dharwnr Craton.- Editorial Note on Silver and Gold Nanoparticles in The Treatment of Cancer
Abstract Views :243 |
PDF Views:1
Authors
Affiliations
1 Department of Pharmacology, United College of Engineering and Research, IN
1 Department of Pharmacology, United College of Engineering and Research, IN
Source
Nano Science & Nano Technology: An Indian Journal, Vol 15, No 1 (2021), Pagination: 1-1Abstract
No Abstract.Keywords
No keywordsReferences
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