Neoarchean lavas of the Ventersdorp Large Igneous Province, South Africa: Sr-Nd-Hf isotopic and trace element evidence for a long-lived plume beneath a stationary African continent

We review the properties of the Neoarchean Ventersdorp Supergroup and provide new trace element concentrations and the first combined Sr-Nd-Hf isotopic compositions for the mafic magmatic products. These sequences contain the remnants of some of the world's oldest Large Igneous Provinces (total...

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Bibliographic Details
Published in:Earth-science reviews 2024-05, Vol.252, p.104752, Article 104752
Main Authors: Khumalo, Khulekani B., Ashwal, Lewis D., Hayes, Ben, Iaccheri, Linda M., Meintjes, P. Gerhard, Webb, Susan J.
Format: Article
Language:English
Subjects:
Australia
basins
crystallization
evolution
Large Igneous Province
Magmatic processes
Mantle sources
Neoarchean era
Plume
South Africa
strontium
subduction
tail
Ventersdorp
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Summary:We review the properties of the Neoarchean Ventersdorp Supergroup and provide new trace element concentrations and the first combined Sr-Nd-Hf isotopic compositions for the mafic magmatic products. These sequences contain the remnants of some of the world's oldest Large Igneous Provinces (total preserved volume = 0.659 × 106 km3). Ventersdorp rocks have been divided into three major units, separated by prominent unconformities: the basal Klipriviersberg Group (∼2.78 Ga), the medial Platberg Group (2.72 Ga) and the upper Pniel Sequence (2.68 Ga). The base of the Klipriviersberg Group is the Westonaria Formation, composed almost entirely of picrites (12–18 wt% MgO) and komatiites (>18 wt% MgO). All other formations of the Klipriviersberg Group contain mainly basaltic (
ISSN:0012-8252
1872-6828
DOI:10.1016/j.earscirev.2024.104752