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dc.contributor.author Mapeo, R.B.M.
dc.contributor.author Ramokate, L.V.
dc.contributor.author Corfu, F.
dc.contributor.author Davis, D.W.
dc.contributor.author Kampunzu, A.B.
dc.date.accessioned 2009-02-10T13:25:48Z
dc.date.available 2009-02-10T13:25:48Z
dc.date.issued 2006
dc.identifier.citation Mapeo, R.B.M. et al (2006) The Okwa basement complex, western Botswana: U–Pb zircon geochronology and implications for Eburnean processes in southern Africa, Journal of African Earth Sciences, vol. 46, pp. 253–262 en
dc.identifier.issn 1464-343X
dc.identifier.uri http://hdl.handle.net/10311/272
dc.description.abstract The Okwa Basement Complex crops out at the northwestern edge of the Kaapvaal craton within the Okwa Inlier, an isolated exposure of Precambrian basement in the Kalahari Desert. New U–Pb zircon dating was performed on all the major Palaeoproterozoic lithologies of the complex. Results are 2055.3 ± 1.3 Ma for augen gneiss, 2056.3 ± 1.3 Ma for foliated monzogranite and 2057 ± 2 Ma for microgranite. A meta-rhyolite gives an age of 2055 ± 4 Ma, based on one concordant zircon, and contains an inherited zircon with an age of 2101 ± 4 Ma. All precisely dated rocks are indistinguishable in age at 2056 ± 2 Ma. This age can be broadly correlated with Palaeoproterozoic geologic events in the Magondi belt at the northwest margin of the Zimbabwe craton and the Triangle Shear Zone in the Limpopo belt. However, the most precise correlation is with the Bushveld Complex, whose age is indistinguishable from that of the Okwa Basement Complex. This suggests a link between marginal and intra-cratonic Bushveld-age magmatism on the Kaapvaal craton. en
dc.language.iso en en
dc.publisher Elsevier Ltd. www.elsevier.com/locate/jafrearsci en
dc.subject Palaeoproterozoic en
dc.subject U–Pb zircon ages en
dc.subject Eburnean en
dc.subject Bushveld magmatism en
dc.subject Okwa en
dc.subject Botswana en
dc.subject Africa en
dc.title The Okwa basement complex, western Botswana: U–Pb zircon geochronology and implications for Eburnean processes in southern Africa en


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