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A precise UPb zircon age for the Archaean Pongola Supergroup volcanics in Swaziland

Journal of African Earth Sciences

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Abstract

UPb dating of single abraded zircon grains from a Pongola Supergroup rhyodacite sample collected in southern Swaziland yields a crystallization age of 2985??1 Ma. This date is significantly older than our previously reported UPb age determined on highly discordant and unabraded zircons from the same sample. The new zircon age indicates that the formation of the Pongola volcanics occurred not much later than the emplacement of the youngest granitoids thought to be broadly coeval with the Dominion Group (Robb et al., 1991), and before deposition of the Lower West Rand Group (Barton et al., 1989). ?? 1994.

Additional Publication Details

Publication type:
Article
Publication Subtype:
Journal Article
Title:
A precise UPb zircon age for the Archaean Pongola Supergroup volcanics in Swaziland
Series title:
Journal of African Earth Sciences
Volume
18
Issue:
4
Year Published:
1994
Language:
English
Larger Work Type:
Article
Larger Work Subtype:
Journal Article
Larger Work Title:
Journal of African Earth Sciences
First page:
339
Last page:
341
Number of Pages:
3