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Kaapvaal craton: Pilbara craton, Western Australia, Vaalbara, Supercontinent, Gondwana, Zimbabwe craton
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| Please note that the content of this book primarily consists of articles
available from Wikipedia or other free sources online. The Kaapvaal
craton (Limpopo province of South Africa), along with the Pilbara craton
of Western Australia, are the only remaining areas of pristine 3.6-2.5
Ga crust on Earth. Similarities of rock records from both these cratons,
especially of the overlying late Archean sequences, suggest that they
were once part of the Vaalbara supercontinent (Zegers et al., 1998). The
Kaapvaal craton covers an area of approximately 1.2-million-square
kilometers and is joined to the Zimbabwe craton to the north by the
Limpopo Belt. To the south and west, the Kaapvaal craton is flanked by
Proterozoic orogens, and to the east by the Lebombo monocline that
contains Jurassic igneous rocks associated with the breakup of Gondwana.
The Kaapvaal craton formed and stabilized between 3.7- and 2.6-billion
years ago by the emplacement of major granitoid batholiths that
thickened and stabilized the continental crust during the early stages
of an arc-related magmatism and sedimentation cycle. |
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i.d.R. innert 7-14 Tagen versandfertig
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