Abstract
The integration of paleomagnetic data with geochronological and geochemical analyses of mafic dyke swarms is a powerful tool for correlating the swarms on regional and global scales. The multidisciplinary approach may also provide important insights into various problems of Earth evolution. We present new results of our paleomagnetic and geochemical investigations of several Proterozoic dykes from the Dharwar craton (Southern India). When combined with the available geochronological data, our data support the presence of at least two different E-W trending dyke swarms (~2,370 and ~1,890 Ma) in the Dharwar craton. Our results are also consistent with the possibility that the Bastar and Dharwar cratons were amalgamated before ~2,370 Ma.
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Acknowledgments
The first author’s (E.J.P.) field work in India in 2010 and geochemical analyses were supported by the Stan Dyl Endowed PhD Fellowship (MTU). We thank Ted Bornhorst for his invaluable help in acquiring and interpreting the geochemical data. We also thank Henry Halls for his constructive comments on this manuscript.
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Piispa, E.J., Smirnov, A.V., Pesonen, L.J., Lingadevaru, M., Anantha Murthy, K.S., Devaraju, T.C. (2011). An Integrated Study of Proterozoic Dykes, Dharwar Craton, Southern India. In: Dyke Swarms:Keys for Geodynamic Interpretation. Springer, Berlin, Heidelberg. https://doi.org/10.1007/978-3-642-12496-9_3
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DOI: https://doi.org/10.1007/978-3-642-12496-9_3
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