Late Mesoproterozoic Arc and Back-arc Volcanism in the Heimefrontfjella (East Antarctica) and Implications for the Palaeogeography at the Southeastern Margin of the Kaapvaal-Grunehogna Craton
The nunataks of Heimefrontfjella in Dronning Maud Land (Antarctica) are dominantly composed of juvenile late Mesoproterozoic rocks that were metamorphosed and deformed at about 1080 and 500 Ma. Three discontinuity-bound terranes have been identified, namely the Kottas, Sivorg and Vardeklettane terranes. In the Sivorg terrane the basement is mainly made up of fine-grained banded felsic and mafic gneisses, representing a metamorphosed bimodal volcanic sequence. In contrast, the basement in the...[Show more]
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