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TitleAge and geochemistry of the boucaut volcanics in the neoproterozoic Adelaide rift complex, South Australia
AuthorArmistead, S EORCID logo; Collins, A SORCID logo; Buckman, S; Atkins, R
SourceAustralian Journal of Earth Sciences 2020 p. 1-10, Open Access logo Open Access
Alt SeriesNatural Resources Canada, Contribution Series 20200589
PublisherTaylor & Francis Ltd.
Mediapaper; on-line; digital
File formatpdf
AreaAdelaide; Australia
Lat/Long WENS 137.0000 141.0000 -30.5000 -35.5000
Subjectsgeochemistry; geochronology; Science and Technology; volcanic processes; Adelaide Rift Complex; Rodinia; Adelaide Superbasin; Proterozoic
Illustrationslocation maps; diagrams; tables; graphs
Released2020 11 18
AbstractThe Adelaide Rift Complex in South Australia records the break-up of Rodinia at a time of great climatic and biological evolution. The Boucaut Volcanics within the Neoproterozoic Adelaide Rift Complex of the Adelaide Superbasin lie at the base of the Burra Group, marking the boundary between the Burra Group and underlying Callanna Group. Despite their significance as one of the few volcanic units within the rift complex, there has been no robust age determination published for the Boucaut Volcanics. We use U–Pb zircon LA-ICP-MS data to determine an age of 788?±?6?Ma for the eruption of the bimodal Boucaut Volcanics. This has important implications for constraining the timing of stratigraphy within the Adelaide Superbasin. This also has far-reaching implications for plate tectonic reconstructions of Australia and Laurentia, and for correlating global isotope anomalies for the Neoproterozoic.

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