| Titre | Age and geochemistry of the boucaut volcanics in the neoproterozoic Adelaide rift complex, South Australia |
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| Auteur | Armistead, S E ;
Collins, A S; Buckman, S; Atkins, R |
| Source | Australian Journal of Earth Sciences 2020 p. 1-10, https://doi.org/10.1080/08120099.2021.1840435  Accès ouvert |
| Image |  |
| Année | 2020 |
| Séries alt. | Ressources naturelles Canada, Contribution externe 20200589 |
| Éditeur | Taylor & Francis Ltd. |
| Document | publication en série |
| Lang. | anglais |
| DOI | https://doi.org/10.1080/08120099.2021.1840435 |
| Media | papier; en ligne; numérique |
| Formats | pdf |
| Région | Adelaide |
| Lat/Long OENS | 137.0000 141.0000 -30.5000 -35.5000 |
| Sujets | processus volcanogènes; Rodinie; géochimie; géochronologie; Sciences et technologie; Protérozoïque |
| Illustrations | cartes de localisation; diagrammes; tableaux; graphiques |
| Diffusé | 2020 11 18 |
| Résumé | (disponible en anglais seulement)
The 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. |
| Sommaire | (Résumé en langage clair et simple, non publié et disponible en anglais seulement)
This article focuses on the Adelaide Rift Complex in South Australia, which holds important clues about
Earth's past. The complex records the breakup of the supercontinent Rodinia, a time when significant changes in climate and life were happening.
Researchers examined a specific rock formation called the Boucaut Volcanics, located in the Adelaide
Rift Complex. These volcanic rocks mark a boundary between two major geological units. Despite their importance, scientists didn't have a precise date for when these rocks were formed.
To find out the age of the Boucaut Volcanics, the researchers
used a technique called U-Pb zircon dating. This method helped them determine that the volcanic rocks are approximately 788 million years old.
This age determination has several important implications. It helps us better understand the geological
history of the Adelaide Rift Complex and the timing of events in the region. It also contributes to our knowledge of how the continents, in this case, Australia and Laurentia, were moving in the distant past. Additionally, it helps scientists
worldwide correlate global geological events that occurred around the same time. This research enhances our understanding of Earth's complex history, which can have broader implications for geology and our planet's evolution. |
| GEOSCAN ID | 327845 |
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