Mantle sources and magma evolution of the Rooiberg lavas, Bushveld Large Igneous Province, South Africa

We report a new whole-rock dataset of major and trace element abundances and 87 Sr/ 86 Sr– 143 Nd/ 144 Nd isotope ratios for basaltic to rhyolitic lavas from the Rooiberg continental large igneous province (LIP). The formation of the Paleoproterozoic Rooiberg Group is contemporaneous with and spatia...

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Bibliographic Details
Published in:Contributions to mineralogy and petrology 2018-06, Vol.173 (6), p.1-27, Article 51
Main Authors: Günther, T., Haase, K. M., Klemd, R., Teschner, C.
Format: Article
Language:English
Subjects:
Anomalies
Basalt
Composition
Cratons
Crystallization
Earth
Earth and Environmental Science
Earth Sciences
Ecological succession
Evolution
Fractional crystallization
Fractionation
Geochemistry
Geology
Intrusion
Isotope ratios
Isotopes
Jurassic
Lava
Lithosphere
Magma
Magnesium oxide
Mantle
Mantle (Geology)
Mantle plumes
Melts (crystal growth)
Mineral Resources
Mineralogy
Modelling
Neodymium isotopes
Niobium
Original Paper
Petrogenesis
Petrology
Rare earth elements
Ratios
Rock
Rocks
Samarium
Strontium 87
Strontium isotopes
Tantalum
Trace elements
Yttrium
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Summary:We report a new whole-rock dataset of major and trace element abundances and 87 Sr/ 86 Sr– 143 Nd/ 144 Nd isotope ratios for basaltic to rhyolitic lavas from the Rooiberg continental large igneous province (LIP). The formation of the Paleoproterozoic Rooiberg Group is contemporaneous with and spatially related to the layered intrusion of the Bushveld Complex, which stratigraphically separates the volcanic succession. Our new data confirm the presence of low- and high-Ti mafic and intermediate lavas (basaltic—andesitic compositions) with > 4 wt% MgO, as well as evolved rocks (andesitic—rhyolitic compositions), characterized by MgO contents of
ISSN:0010-7999
1432-0967
DOI:10.1007/s00410-018-1477-y