Three stages in the Late Paleozoic to Triassic magmatism of southwestern Gondwana, and the relationships with the volcanogenic events in coeval basins
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- 作者：Ana Marí ; a Satoa ; sato@cig.museo.unlp.edu.ar" class="auth_mail" title="E-mail the corresponding author ; Eduardo J. Llambí ; asa ; llambias@cig.museo.unlp.edu.ar" class="auth_mail" title="E-mail the corresponding author ; Miguel A.S. Baseib ; baseimas@usp.br" class="auth_mail" title="E-mail the corresponding author ; Carlos E. Castroc ; cecastro@unsj.edu.ar" class="auth_mail" title="E-mail the corresponding author
- 关键词：Choiyoi magmatism ; Permian ; Southwestern Gondwana basins ; Ash fall deposits ; U&ndash ; Pb geochronology
- 刊名：Journal of South American Earth Sciences
- 出版年：2015
- 出版时间：November 2015
- 年：2015
- 卷：63
- 期：Complete
- 页码：48-69
- 全文大小：9537 K
文摘
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Six U–Pb ages between c. 279 and 253 Ma were obtained from the Choiyoi magmatism in Argentine Frontal Cordillera.
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Three stages of magmatism are identified in the evolution of the Late Paleozoic to Triassic, southwestern Gondwana margin.
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These stages are named pre-Choiyoi, Choiyoi (286–247 Ma) and post-Choiyoi magmatism, and their characteristics are given.
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The Paganzo basin registers only the pre-Choiyoi magmatism, and the Sauce Grande basin only the Choiyoi magmatism.
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The Paraná and Karoo basins register both the pre-Choiyoi and Choiyoi magmatism.