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Comments on: ‘Petrogenesis of Proterozoic Lamproites and Kimberlites from the Cuddapah Basin and Dharwar Craton, Southern India’
NATIONAL GEOPHYSICAL RESEARCH INSTITUTE, UPPAL ROAD, HYDERABAD 500 007, INDIA
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Kimberlites intrude the late Archaean eastern Dharwar Craton in two spatially separate fields (
150 km apart, near Mahbubnagar in the north and Anantapur in the south) to the west of the Proterozoic Cuddapah Basin in southern India. Two lamproite bodies intrude the thick Cuddapah Basin sediments near Chelima and Zangamarajupalle, and a third occurs just outside the present NE margin of the basin near Ramannapeta. Chalapathi Rao et al. (2004)
have studied this spatially, and possibly temporally, close association of kimberlites and lamproites to provide insights into their genesis and genetic relationship. Although the main emphasis of their paper is the petrochemical characterization of these two suites of rocks, they also report Sr–Nd isotope data for a small subset of samples, which they use to provide constraints on the nature of the mantle source regions.
Of some
* Corresponding author. E-mail: ganilkumar@rediffmail.com
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  N. V. CHALAPATHI RAO, S. A. GIBSON, D. M. PYLE, A. P. DICKIN, and J. DAY Petrogenesis of Proterozoic Lamproites and Kimberlites from the Cuddapah Basin and Dharwar Craton, Southern India: a Reply J. Petrology, June 1, 2005; 46(6): 1081 - 1084. [Full Text] [PDF]
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