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Ages of detrital zircon grains from Neoproterozoic siliciclastic rocks in the Shakawe area: implications for the evolution of Proterozoic crust in northern Botswana

Mapeo, R.B.M.; Kampunzu, A.B.; Armstrong, R.A. (Geological Society of South Africa. http://sajg.geoscienceworld.org/, June NaN, 2000)

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Abstract:

The Precambrian rocks of northern Botswana comprise poorly exposed igneous complexes, high-grade metamorphic rocks, as well as sedimentary sequences including mainly siliciclastic and carbonate rocks. New U-Pb SHRIMP data are presented for detrital zircons from siliciclastic rocks collected from the Shakawe area in northern Botswana. These data show three main age groups at c. 1020 Ma, 1090 Ma, and 2050 Ma which support contentions for local provenance of the sediments. They also fix the maximum age of the deposition of these siliciclastic rocks at 1020 Ma. The results support field evidence suggesting that the siliciclastic rocks exposed in the Shakawe zone are part of the Ghanzi-Chobe Supergroup.

URI:

http://hdl.handle.net/10311/371

Files in this item: 1

mapeodoc.pdf (1.611Mb)

An overview of the geology and major ore deposits of Central Africa: Explanatory note for the 1:4,000,000 map ‘‘Geology and major ore deposits of Central Africa’’

Milesi, J.P.; Toteu, S.F.; Deschamps, Y.; Feybesse, J.L.; Lerouge, C.; Cocherie, A.; Penaye, J.; Tchameni, R.; Moloto-A-Kenguemba, G.; Kampunzu, H.A.B.; Nicol, N.; Duguey, E.; Leistel, J.M.; Saint-Martin, M.; Ralay, F.; Heinry, C.; Bouchot, V.; Mbaigane, J.C. Doumnang; Kula, V. Kanda; Chene, F.; Monthel, J.; Boutin, P.; Cailteux, J. (Elsevier www.elsevier.com/locate/jafrearsci, NaN, 2006)

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Abstract:

This paper is prepared within the frameworks of IGCP Project 470 and the associated BRGM scientific project ‘‘Africa 1999–2004’’ to accompany the 1:4,000,000 scale map ‘‘Geology and major ore deposits of Central Africa, presented at the 20th Colloquium of African Geology in Orleans in June 2004. It incorporates geological and metallogenic data from eight countries in Central Africa (Angola, Cameroon, Chad, Central African Republic, Congo Brazzaville, Democratic Republic of Congo (DRC), Equatorial Guinea and Zambia). The map is a harmonised and geo-referenced preliminary map, based on a GIS at 1:2,000,000 scale, and focusses on the spatial and temporal distribution of selected major deposits.

URI:

http://hdl.handle.net/10311/384

Files in this item: 1

Kampunzu2006MajorOreDeposits.pdf (2.307Mb)

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