Evolution of Eocene to Oligocene arc-related volcanism in the North Patagonian Andes (39-41°S), prior to the break-up of the Farallon plate

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• 作者：Sofí ; a B. Iannelli ; ^{sofia.iannelli@hotmail.com.ar} ; Vanesa D. Litvak ^{vane@gl.fcen.uba.ar} ; Lucí ; a Ferná ; ndez Paz ^{luufernandez@hotmail.com} ; André ; s Folguera ^{andresfolguera2@yahoo.com.ar} ; Miguel E. Ramos ^{miguelestebanramos@hotmail.com} ; Ví ; ctor A. Ramos ^{andes@gl.fcen.uba.ar}
• 关键词：Eocene-Oligocene ; Arc volcanism ; Geochemistry ; Tectonic evolution ; Patagonian Andean margin
• 刊名：Tectonophysics
• 出版年：2017
• 出版时间：31 January 2017
• 年：2017
• 卷：696-697
• 期：Complete
• 页码：70-87
• 全文大小：5444 K
• 卷排序：696

文摘

New geochemical data for Paleogene North Patagonian magmas is shown in this work. Eocene magmatism shows limited slab influence and a slightly alkaline tendency. Oligocene to Miocene arc rocks show an increase slab signal and changes in magma source. Farallon plate break-up is a turning point in the development of this magmatism.