Comments on: 'Petrogenesis of Proterozoic Lamproites and Kimberlites from the Cuddapah Basin and Dharwar Craton, Southern India' |
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| Authors: | KUMAR ANIL; GOPALAN K |
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| Institution: | NATIONAL GEOPHYSICAL RESEARCH INSTITUTE, UPPAL ROAD, HYDERABAD 500 007, INDIA |
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| Abstract: | Kimberlites intrude the late Archaean eastern Dharwar Cratonin two spatially separate fields ( 150 km apart, near Mahbubnagarin the north and Anantapur in the south) to the west of theProterozoic Cuddapah Basin in southern India. Two lamproitebodies intrude the thick Cuddapah Basin sediments near Chelimaand Zangamarajupalle, and a third occurs just outside the presentNE 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 insightsinto their genesis and genetic relationship. Although the mainemphasis of their paper is the petrochemical characterizationof these two suites of rocks, they also report Sr–Nd isotopedata for a small subset of samples, which they use to provideconstraints on the nature of the mantle source regions. Of some |
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