Dharwar craton

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The Dharwar craton in South India presents a natural cross-section of late-Archaean continental crust. There are three main structural zones: a root zone of highly heterogeneous petrology (from monzonite to granite) and texture (phenocryst accumulation), a "channel zone" where evidences of large scale magma ascent can be observed, and a zone of superficial intrusions, consisting in independent homogeneous intrusive bodies. In the root zone, mantle-derived magma underwent fractional crystallisation which was followed by mingling between the residual liquids and melts generated by anatexis of the surrounding gneissic basement.

[edit] References

  • Auvrey, Bernard, Mudlappa Jayananda, B Mahabaleswar, HervĂ© Martin and Jean-François Moyen. (1999) "From the Roots to the Top of a Granitic Body: The Closepet Granite of South India." Journal of Conference Abstracts, Vol. 4, No. 1, Symposium A08, Early Evolution of the Continental Crust. [1]
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