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AT1-9: Neoproterozoic to Triassic Evolution of the Terra Australis Orogen in Western South America.

Conveners: Javiera Morandé, Teck Resources. Constantino Mpodozis, Independent Consultant. Francisco Hervé, Universidad Andrés Bello, Heinrich Bahlburg, University of Münster, Germany.

New analytical methods and increasingly integrated studies have shed new light on South American and Antarctic margin plate tectonic evolution from the Proterozoic to Triassic. This helps to refine the understanding of the interaction among tectonics, magmatism and metamorphism, and the formation and inner architecture of relevant sedimentary basins for analyzing and interpretating the pre-Andean evolution of the western margin of the Gondwana supercontinent. The structural patterns developed during this period, in turn exert a strong influence on Andean mountains building.

We welcome contributions from all geoscience fields that contribute to the understanding of the pre-Andean evolution of Gondwana’s southwestern margin, involving the presentation of research about Rodinia and its role as a basement of the development and evolution of Gondwana. We solicit contributions that involve new field and lab data on provenance analysis and the geochronology of magmatic, metamorphic, and sedimentary rocks, regarding stratigraphic correlations, geophysical interpretations and paleogeographic reconstructions.