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Ghosh, S.
- Is the Simplipal Complex a Product of Shallow Plume Tectonics?
Abstract Views :181 |
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Authors
P. K. Banerjee
1,
S. Ghosh
2
Affiliations
1 School of Oceanography, Jadavpur University, Calcutta-700 032, IN
2 Geological Survey of India, Calcutta-700 016, IN
1 School of Oceanography, Jadavpur University, Calcutta-700 032, IN
2 Geological Survey of India, Calcutta-700 016, IN
Source
Journal of Geological Society of India (Online archive from Vol 1 to Vol 78), Vol 43, No 4 (1994), Pagination: 353-359Abstract
The Simlipal basic volcanics share two common features with the Newer Dolerite dyke swarm (within the Singhbhum-Keonjhar granite) and the Ongarbira volcanics and Dangoaposi lavas occurring along its western margin: their freedom from intense folding movements and from granite intrusion; although Simlipal's tectonic and chronologic frame with grits and sandstones alternating with basic volcanics still awaits solution. The geologic and isotope geochronologic data available from these suites do not rule out the possibility that these could be broadly contemporaneous eruptions and emplacements. Judging by the uniform spread of the dykes over approx. 20,000 sq·km of granite country, the forcing of all these eruptions by a plume head, spreading below the Singhbhum continental lithosphere near the transition between Proterozoic I and II is suggested as a tectonomagmatic model, to be tested in future against high resolution isotope geochronological dates and dependable REE and Nd-Sr geochemistry for defining the eruptive events of this terrain.Keywords
Tectonics, Simlipal, Ongarbira, Dangoaposi lavas, Newer Dolerite, Proterozoic, Orissa, Bihar.- Fluid Evolution of the Mosabani and Rakha Copper Deposits, Singhbhum District, Jharkhand: Evidence from Fluid Inclusion Study of Mineralized Quartz Veins
Abstract Views :168 |
PDF Views:5
Authors
Affiliations
1 Department of Geology and Geophysics, Indian Institute of Technology, Kharagpur - 721 302, IN
2 EASC, 8888 University Drive, Simon Fraser University, Burnabay, B.C., Canada V5A156, CA
1 Department of Geology and Geophysics, Indian Institute of Technology, Kharagpur - 721 302, IN
2 EASC, 8888 University Drive, Simon Fraser University, Burnabay, B.C., Canada V5A156, CA