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Articles | Volume 15, issue 10
Articles | Volume 15, issue 10
https://doi.org/10.5194/se-15-1265-2024
© Author(s) 2024. This work is distributed under
the Creative Commons Attribution 4.0 License.
Special issue:
https://doi.org/10.5194/se-15-1265-2024
© Author(s) 2024. This work is distributed under
the Creative Commons Attribution 4.0 License.
Articles | Volume 15, issue 10
Research article
 | 
29 Oct 2024
Research article |  | 29 Oct 2024

Along-strike variation in volcanic addition controlling post-breakup sedimentary infill: Pelotas margin, austral South Atlantic

Marlise C. Cassel, Nick Kusznir, Gianreto Manatschal, and Daniel Sauter

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Short summary
We investigate the along-strike variation in volcanics on the Pelotas segment of the Brazilian margin created during continental breakup and formation of the southern South Atlantic.  We show that the volume of volcanics strongly controls the amount of space available for post-breakup sedimentation. We also show that breakup varies along-strike from very magma-rich to magma-normal within a relatively short distance of less than 300 km. This is not as expected from a simple mantle plume model.
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