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Maheshwari, Anil
- Flow-Stratigraphy and Geochemical Variants of Bhadrajan Volcanics, Jalore District, Rajasthan: Implications for a Heterogeneous Protolith
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Authors
Affiliations
1 III/124 G.S.I. Colony, Malviya Nagar, Jaipur 302 017, IN
2 Department of Geology, University of Rajasthan, Jaipur 302004, IN
3 Istituto di Mineralogia, Universita di Ferrara, 44100, Ferrara, IT
1 III/124 G.S.I. Colony, Malviya Nagar, Jaipur 302 017, IN
2 Department of Geology, University of Rajasthan, Jaipur 302004, IN
3 Istituto di Mineralogia, Universita di Ferrara, 44100, Ferrara, IT
Source
Journal of Geological Society of India (Online archive from Vol 1 to Vol 78), Vol 52, No 4 (1998), Pagination: 433-441Abstract
The Malani volcanics exposed in a curvilinear pattern around Bhadrajan are characterised by the presence of eight flows of rhyolitic to dacitic composition and have chemical characteristics similar to within plate, A-type granitic rocks. The pyroclastic unit present at the base of each flow marks the beginning of next pulse of discharge. The chemistry of Bhadrajan volcanics suggests two distinct rhyolite groups. Group "A" is characterised by high Ca, Al, Na2O/K2O and low Rb, Th, La, Ce and Rb/Sr as compared to group "B" rhyolites. The field and chemical data suggest a heterogeneous nature of protolith for Bhadrajan volcanics. The partial, melting of igneous and siliceous metapelitic protolith could result in "A" and "B" group of rhyolites respectively.Keywords
Geochemistry, Malani Rhyolites, Flow Stratigraphy, Rajasthan.- Carbon Isotope Oscillations through the Marwar Supergroup, Western Rajasthan
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Authors
Affiliations
1 Department of Geology, University of Rajasthan, Jaipur - 302 004, IN
2 NEG-LABISE, Department of Geology, C.P. 7852, Federal, University of Pernambuco, Recife, 50732-970, BR
3 Geology, J.N.V. University, Jodhpur, IN
1 Department of Geology, University of Rajasthan, Jaipur - 302 004, IN
2 NEG-LABISE, Department of Geology, C.P. 7852, Federal, University of Pernambuco, Recife, 50732-970, BR
3 Geology, J.N.V. University, Jodhpur, IN