New evidence for Neoarchaean, hydrothermally altered granites in south-central Botswana

Autor:	R. M. Key, Sandra L. Kamo, L. R. M. Daniels
Rok vydání:	1995
Předmět:	geography geography.geographical_feature_category Archean Geochemistry Geology engineering.material Precambrian Igneous rock Craton Basement (geology) Absolute dating Titanite engineering Zircon
Zdroj:	Journal of the Geological Society. 152:747-750
ISSN:	2041-479X 0016-7649
DOI:	10.1144/gsjgs.152.5.0747
Popis:	Recent drilling in south-central Botswana intersected hydrothermally altered dolerite and granitic rocks beneath Karoo strata on the western side of a domical structure. This structure occurs within the western part of the Kaapvaal Craton and is bounded to the west by the N-trending Palaeoproterozoic Kheis Belt. U–Pb dating of zircon and titanite from the cored granitic rock gives an age of 2928 ± 4 Ma, which provides a temporal correlation with hydrothermally altered rocks along the northern margin of the, Witwatersrand basin, South Africa. These hydrothermally altered rocks may form part of the source area for the Neoarchaeau Witwatersrand gold deposits. The age also indicates that the Kaapvaal Craton extends as far west as Mabuasehube.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::9f87e702742d1d7a988599d5557bedf0 https://doi.org/10.1144/gsjgs.152.5.0747 Zobrazit plný text záznamu