Quick Search:    advanced search

GSW Home   GeoRef Home   My GSW Alerts   Contact GSW   About GSW   Journals List   Help

This Article Figures Only Full Text Full Text (PDF) Alert me when this article is cited Alert me if a correction is posted Citation Map Services Email this article to a friend Similar articles in this journal Similar articles in ISI Web of Science Alert me to new issues of the journal Download to citation manager Citing Articles Citing Articles via HighWire Citing Articles via ISI Web of Science (4) Citing Articles via Google Scholar Google Scholar Articles by Mapeo, R.B.M. Articles by Ramokate, L.V. Search for Related Content GeoRef GeoRef Citation

SHRIMP U-Pb zircon ages of granitoids from the Western Domain of the Kaapvaal Craton, Southeastern Botswana: implications for crustal evolution

University of Botswana, Private Bag 0022, Gaborone, Botswana., e-mail: mapeorbm{at}mopipi.ub.bw

R.A. Armstrong

Research School of Earth Sciences, Australian National University, Canberra ACT 0200, Australia., e-mail: richard.armstrong{at}anu.edu.au

A.B. Kampunzu

University of Botswana, Private Bag 0022, Gaborone, Botswana, e-mail: kampunzu{at}mopipi.ub.bw

L.V. Ramokate

Geological Survey Department, Private Bag 14, Lobatse, Botswana, e-mail: lvramokate{at}gov.bw

SHRIMP U-Pb zircon dating of granitoids from borehole cores from the Amalia-Kraaipan granite-greenstone terrain of southeast Botswana yielded dates of: 2939±9 Ma for the biotite granite gneiss, 2943±9 Ma for the pink granite and 2782±6 Ma for the red granite. These dates define two main granite magmatic events in the Western Domain of the Kaapvaal Craton at ~2.96 to ~2.94 Ga and ~2.78 Ga. In the Kaapvaal Shield the main magmatic events are dated at ~3.5 to ~3.3, ~3.2 to ~3.1, ~2.96 to ~2.94 and ~2.78 Ga. The two domains were therefore affected by coeval igneous events at ~2.96 to ~2.94 Ga and ~2.78 Ga and therefore the age of ~2.96 to ~2.94 Ga is taken to date their amalgamation along the Colesberg lineament. The ages of ~2.78 Ga correspond to the emplacement of the Gaborone Igneous Complex of southeast Botswana, which is possibly related to the reactivation of or renewed igneous activity along the Colesberg lineament.

This article has been cited by other articles:

				M. Poujol, A.J. Hirner, R.A. Armstrong, and C.R. Anhaeusser U-Pb SHRIMP data for the Madibe greenstone belt: implications for crustal growth on the western margin of the Kaapvaal Craton, South Africa South African Journal of Geology, March 1, 2008; 111(1): 67 - 78. [Abstract] [Full Text] [PDF]