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Geology of Zimbabwe information


Map of the Zimbabwe and Kaapvaal Cratons
SW end of the 550 km long Great Dyke of Zimbabwe from ISS, 2010.
Brachiosaurus femur and Geologist Metrinah Ruzvidzo, 2005

The geology of Zimbabwe in southern Africa is centered on the Zimbabwe Craton, a core of Archean basement composed in the main of granitoids, schist and gneisses. It also incorporates greenstone belts comprising mafic, ultramafic and felsic volcanics which are associated with epiclastic sediments and iron formations. The craton is overlain in the north, northwest and east by Proterozoic and Phanerozoic sedimentary basins whilst to the northwest are the rocks of the Magondi Supergroup.[1] Northwards is the Zambezi Belt and to the east the Mozambique Belt. South of the Zimbabwe Craton is the Kaapvaal Craton separated from it by the Limpopo Mobile Belt, a zone of deformation and metamorphism reflecting geological events from Archean to Mesoproterozoic times. The Zimbabwe Craton is intruded by an elongate ultramafic/mafic igneous complex known as the Great Dyke which runs for more than 500 km along a SSW/NNE oriented graben. It consists of peridotites, pyroxenites, norites and bands of chromitite.[2]

  1. ^ Treloar, Peter J. (1988). "The geological evolution of the Magondi Mobile Belt, Zimbabwe". Precambrian Research. 38 (1): 55–73. Bibcode:1988PreR...38...55T. doi:10.1016/0301-9268(88)90093-9.
  2. ^ "Zimbabwe, geology Extractive Industries Source Book". Archived from the original on 2013-03-02. Retrieved 2013-04-20.

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