气候变化领域集成服务门户(CCPortal): Episodic construction of the early Andean Cordillera unravelled by zircon petrochronology

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DOI	10.1038/s41467-021-25232-z
	Episodic construction of the early Andean Cordillera unravelled by zircon petrochronology
	Jara J.J.; Barra F.; Reich M.; Leisen M.; Romero R.; Morata D.
发表日期	2021
卷号	12 期号:1
英文摘要	The subduction of oceanic plates beneath continental lithosphere is responsible for continental growth and recycling of oceanic crust, promoting the formation of Cordilleran arcs. However, the processes that control the evolution of these Cordilleran orogenic belts, particularly during their early stages of formation, have not been fully investigated. Here we use a multi-proxy geochemical approach, based on zircon petrochronology and whole-rock analyses, to assess the early evolution of the Andes, one of the most remarkable continental arcs in the world. Our results show that magmatism in the early Andean Cordillera occurred over a period of ~120 million years with six distinct plutonic episodes between 215 and 94 Ma. Each episode is the result of a complex interplay between mantle, crust, slab and sediment contributions that can be traced using zircon chemistry. Overall, the magmatism evolved in response to changes in the tectonic configuration, from transtensional/extensional conditions (215–145 Ma) to a transtensional regime (138–94 Ma). We conclude that an external (tectonic) forcing model with mantle-derived inputs is responsible for the episodic plutonism in this extensional continental arc. This study highlights the use of zircon petrochronology in assessing the multimillion-year crustal scale evolution of Cordilleran arcs. © 2021, The Author(s).
语种	英语
scopus关键词	zirconium; continental lithosphere; magmatism; plutonism; subduction zone; zircon; Article; Chile; chronology; evolution; geochemical analysis; geology; lithosphere; rock; sediment; Andes; Cordillera; Paraguay
来源期刊	Nature Communications
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/251550
作者单位	Departamento de Geología y Centro de Excelencia en Geotermia de los Andes (CEGA), FCFM, Universidad de Chile, Santiago, Chile; Departamento de Ingeniería de Minería, Pontificia Universidad Católica de Chile, Santiago, Chile; Millennium Nucleus for Metal Tracing Along Subduction, FCFM, Universidad de Chile, Santiago, Chile
推荐引用方式 GB/T 7714	Jara J.J.,Barra F.,Reich M.,et al. Episodic construction of the early Andean Cordillera unravelled by zircon petrochronology[J],2021,12(1).
APA	Jara J.J.,Barra F.,Reich M.,Leisen M.,Romero R.,&Morata D..(2021).Episodic construction of the early Andean Cordillera unravelled by zircon petrochronology.Nature Communications,12(1).
MLA	Jara J.J.,et al."Episodic construction of the early Andean Cordillera unravelled by zircon petrochronology".Nature Communications 12.1(2021).