Cycles of Andean mountain building archived in the Amazon Fan

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dc.contributor.authorMason, Cody C.en
dc.contributor.authorRomans, Brian W.en
dc.contributor.authorPatterson, Molly O.en
dc.contributor.authorStockli, Daniel F.en
dc.contributor.authorFildani, Andreaen
dc.date.accessioned2023-04-20T13:11:36Zen
dc.date.available2023-04-20T13:11:36Zen
dc.date.issued2022-11en
dc.description.abstractCordilleran orogenic systems have complex, polycyclic magmatic and deformation histories, and the timescales and mechanisms of episodic orogenesis are still debated. Here, we show that detrital zircons (DZs) in terrigenous sediment from the late Pleistocene Amazon Fan, found at the terminus of the continent-scale Amazon River-fan system, record multiple, distinct modes of U-Pb crystallization ages and U-Th/He (ZHe) cooling ages that correlate to known South American magmatic and tectonic events. The youngest ZHe ages delineate two recent phases of Andean orogenesis; one in the Late Cretaceous - Paleogene, and another in the Miocene. Frequency analyses of the deep-time Phanerozoic record of DZ U-Pb and ZHe ages demonstrate a strong 72 Myr period in magmatic events, and 92 Myr and 57 Myr periods in crustal cooling. We interpret these results as evidence of changes in upper and lower plate coupling, associated with multiple episodes of magmatism and crustal deformation along the subduction-dominated western margin of South America.en
dc.description.notesThe authors wish to acknowledge Equinor for grant funding.en
dc.description.sponsorshipEquinoren
dc.description.versionPublished versionen
dc.format.mimetypeapplication/pdfen
dc.identifier.doihttps://doi.org/10.1038/s41467-022-34561-6en
dc.identifier.eissn2041-1723en
dc.identifier.issue1en
dc.identifier.other6983en
dc.identifier.pmid36379929en
dc.identifier.urihttp://hdl.handle.net/10919/114589en
dc.identifier.volume13en
dc.language.isoenen
dc.publisherNature Portfolioen
dc.rightsCreative Commons Attribution 4.0 Internationalen
dc.rights.urihttp://creativecommons.org/licenses/by/4.0/en
dc.subjectDetrital zircon recorden
dc.subjectu-pb geochronologyen
dc.subjectforeland basinen
dc.subjectprovenance evolutionen
dc.subjectsediment provenanceen
dc.subjecteastern cordilleraen
dc.subjectexhumationen
dc.subjecthistoryen
dc.subjectriversen
dc.subjectconstraintsen
dc.titleCycles of Andean mountain building archived in the Amazon Fanen
dc.title.serialNature Communicationsen
dc.typeArticle - Refereeden
dc.type.dcmitypeTexten

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