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V. J. Gupta ¹, P. C. Bisaria ¹, D. K. Chadha ¹, G. Mahajan ¹, S. Kumar ¹, S. R. Kashyap ¹, N. Kochhar ¹, N. S. Virdi ¹

Affiliations
1 Centre of Advanced Study in Geology, Panjab University, Chandigarh, IN

Abstract

No Abstract.

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N. Kochhar ¹, K. Pande ², K. Gopalan ²

Affiliations
1 Department of Geology, Punjab University, Chandigarh 160014, IN
2 Physical Research Laboratory, Navrangpura, Ahmedabad 380009, IN

Abstract

Acid volcanics and associated granites from the Tusham Ring Complex in northwestern India yield a well defined Rb-Sr isochron corresponding to an age of 754±20 Ma (λ=1.42 x 10^-11 yr^-1 ) and an initial Sr composition of 0.7131±0.0025. This is in good agreement with the age of the Malani suite of igneous rocks of western Rajasthan.

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N. Kochhar ¹, S. Dhar ¹

Affiliations
1 Department of Geology, Panjab University, Chandigarh-160 014, IN

Abstract

Detailed field, petrological and the Chemical studies of lhe Jalor granites, Western Rajastan show that the Jalor magnatism is not exclusively peraluminous in nature but has peralkaline Component closely associated in space and time. The Jalor complex is a classic example of hypersolvus-susolvus granite association. The Similar abundances of trace elements such as Ba, Th, U, Ga, Y and Zr in the hypersolvus and the subsolvus granites suggest that both magmas have common Source and are coeval. the hypersolvus granites show enrichment of LREE as compared to the subsolvus granites, but the subsolvus granites have more pronounced Eu anomaly. Tectonic significance of the find also discussed.

Keywords

Malani Igneous Suite, Petrology, Geochemistry, Granites, Jalor, Rajasthan.

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