Zircon U Pb ages and Hf isotopes tracking the origin of Permian Paraná Basin ash fall layers: are they coming from Choiyoi formation?

作者

Mariana De Matheus Marques Dos Santos¹ , Cláudia Regina Passarelli¹ , Miguel Angelo Stipp Basei¹ , Antonio Roberto Saad¹ , Paulo Roberto Dos Santos¹ , Oswaldo Siga Júnior¹

1. Institute of Geoscience - University of São Paulo

会议/活动

XII South American Symposium on Isotope Geology, SSAGI 2022, July 2022 (Santiago, Chile)

海报摘要

In the Paleozoic, during the supercontinent Pangea, the regions furthest from the active margins experienced extensive periods of tectonic stability and large syneclyses have been formed in south Brazil, Argentina, Paraguay, and Uruguay. In Brazil, volcanic ash and volcanic glass fragments were found in several formations of the Paraná Basin, such as the Rio Bonito, Irati, Rio do Rasto, and Estrada Nova/Teresina. We present new Hf isotope compositions of zircons previously dated by SHRIMP U-Pb ages (Rocha Campos et al. 2011, 2019) with an interest in deepening the previous suggestions that the volcanic ash-fall layers and vitroclastic-carrying sediments from the Paraná Basin and the Choiyoi Formation volcanic rocks would have a common origin, in addition to their Permian ages.

关键词

Paraná Basin, Choiyoi Igneous Province, LA-ICP-MS, Ash fall layers, U-Pb, Hf

研究领域

Earth Sciences

参考文献

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基金

1. FUSP (No. 3218)
2. FAPESP (No. 2015/03737-0)

补充材料

暂无数据

附加信息

利益冲突

No competing interests were disclosed.

数据可用性声明

The datasets generated during and / or analyzed during the current study are available from the corresponding author on reasonable request.

知识共享许可协议

Copyright © 2022 De Matheus Marques Dos Santos et al. This is an open access work distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.