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Short Communication |
1 1Economic Geology Research Institute/Hugh Allsopp Laboratory, School of Geosciences, University of the Witwatersrand, Pvt. Bag 3, WITS 2050, Johannesburg, South Africa (e-mail: christinerainaud@hotmail.com)
2 2Research School of Earth Sciences, The Australian National University, Canberra, ACT 0200, Australia
In a study of the geochronology of the Katangan Sequence and its basement in the Central African Copperbelt, detrital and xenocrystic zircons from Muva quartzites and Katangan lapilli tuffs, were dated using the Sensitive High-Resolution Ion Microprobe (SHRIMP). A detrital population (dated between 3007 and 3031 Ma) and a group of xenocrystic zircons aged between 3169 and 3225 Ma provide the first evidence for the existence of a Mesoarchaean basement beneath the Central African Copperbelt.
Keywords: Mesoarchaean, Central African Copperbelt, SHRIMP, terranes.
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