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Mathur, A. K.
- On the Occurrence of Sargur Type Banded Iron-Formation in Banded Gneissic Complex of South Rajasthan
Abstract Views :225 |
PDF Views:1
Authors
K. C. Sahoo
1,
A. K. Mathur
1
Affiliations
1 Geological Survey of India, Jhalana Dungri, Jaipur, IN
1 Geological Survey of India, Jhalana Dungri, Jaipur, IN
Source
Journal of Geological Society of India (Online archive from Vol 1 to Vol 78), Vol 38, No 3 (1991), Pagination: 299-302Abstract
The occurrence of BIF from a part of Banded Gneissic Complex of Rajasthan is reported. Older than 3.0 Ga granites, their field-setting and petrochemical characters are comparable to the BIF of older supracrustals of south India (Sargur Group).Keywords
Banded Iron-Formation, Banded Gneissic Complex, Rajasthan.- Event Stratigraphy and Physico-Chemical Characters of Banded Gneissic Complex and Associated Supracrustals in the South Mewar Plains of Rajasthan
Abstract Views :173 |
PDF Views:1
Authors
Utpal Bose
1,
A. K. Mathur
1,
K. C. Sahoo
2,
S. Bhattacharya
1,
Krishan Dutt
1,
V. Aneel Kumar
3,
S. S. Sarkar
1,
S. Chowdhury
1,
I. Chowdhury
1
Affiliations
1 Geological Survey of India, Jhalana Dungri, Jaipur - 302 004, IN
2 Geological Survey of India, Bhubaneswar - 751 012, IN
3 Geological Survey of India, Hyderabad - 500 660, IN
1 Geological Survey of India, Jhalana Dungri, Jaipur - 302 004, IN
2 Geological Survey of India, Bhubaneswar - 751 012, IN
3 Geological Survey of India, Hyderabad - 500 660, IN
Source
Journal of Geological Society of India (Online archive from Vol 1 to Vol 78), Vol 47, No 3 (1996), Pagination: 325-338Abstract
The oldest cratonic nucleus pf the Western Indian shield, familiarly known as the Banded Gneissic Complex (BGC), occupies a large tract in the Mcwar plains of South Rajasthan. It has essentially an old gneissic component (3.3 Ga) and a host of mafic bodies associated with detrital and chemogenic sediments which have been subjected to multiple phases of anatexis and granite intrusions (2.9 Ga and later events). The emplacement of Berach granite and succeeding dolerite dyke swarms mark the end-Archaean cratonization process. This also initiated intracratonic and cratonmarginal basin formation.Later magmatism, especially along the basement-cover interface. is due to local remobilisation of the basement at the time of Proterozoic orogeny.
Keywords
Banded Gneissic Complex, Stratigraphy, Petrochemistry, Rajasthan.- Some Critical Field Observations on the Genesis and Stratigraphical Status of Pokaran Boulder Bed, Western Rajasthan
Abstract Views :200 |
PDF Views:2
Authors
Affiliations
1 57, Clay Square, Lucknow - 226 001, IN
2 Geological Survey of India, Palaeontology Division, Jaipur - 302 004, IN
1 57, Clay Square, Lucknow - 226 001, IN
2 Geological Survey of India, Palaeontology Division, Jaipur - 302 004, IN
Source
Journal of Geological Society of India (Online archive from Vol 1 to Vol 78), Vol 65, No 3 (2005), Pagination: 301-308Abstract
Based on the present detailed field observations on the physiographic setting and the lithological nature of the Pokran Boulder Bed (PBB), the authors conclude that it is a consolidated sedimentary bed, apparently in the nature of a glacial drift and not a tillite (like Talchir Formation of Gondwana Supergroup). The denuded upper surface of bouldery hummocks of the PBB on the ground invariably shows presence of loose boulders. The consolidated horizons lie buried within the hummocks, wherever thicker horizons of PBB are still preserved. The weathered top of the PBB, forming rolling, hummocky topography is reminiscent of continental glaciated areas. It is likely that the PBB represents remnant of the Well-Known global Precambrian (Vendian) Ice Age. It rests directly over the rhyolitic (Malani Rhyolite) basement.The field observations also lead to the conclusion that the thick succession of sandstones of the Jodhpur Group (sometimes referred as 'Jodhpur sandstone') of Marwar Supergroup (MSG) only occasionally overlie the PBB and always with a marked unconformity, such as at Gaphur Khan ki Dhani and elsewhere. Clearly the PBB does not form part of the stratigraphy of Marwar Supergroup.
Keywords
Pokaran Boulder Bed, Genesis, Stratigraphical Status, Marwar Supergroup, Rajasthan.- Critical Field Observations on the Genesis and Stratigraphical Status of Pokaran Boulder Bed, Western Rajasthan
Abstract Views :209 |
PDF Views:144
Authors
Affiliations
1 Office of the Dean, New Campus, Jai Narain Vyas University, Jodhpur - 342 00 1, IN
2 57, Clay Square, Lucknow - 226 001, IN
1 Office of the Dean, New Campus, Jai Narain Vyas University, Jodhpur - 342 00 1, IN
2 57, Clay Square, Lucknow - 226 001, IN
Source
Journal of Geological Society of India (Online archive from Vol 1 to Vol 78), Vol 66, No 3 (2005), Pagination: 373-376Abstract
No Abstract.- Note on the Present Stratigraphic Status of Khichan Conglomerate, Jodhpur District, Rajasthan
Abstract Views :173 |
PDF Views:147
Authors
Affiliations
1 Geological Survey of India, Jhalanadungari, Jaipur -302 004, IN
1 Geological Survey of India, Jhalanadungari, Jaipur -302 004, IN