In situ cosmogenic 3He and 36Cl and radiocarbon dating of volcanic deposits refine the Pleistocene and Holocene eruption chronology of SW Peru

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dc.contributor.authorBromley, Gordon R. M.
dc.contributor.authorThouret, Jean-Claude
dc.contributor.authorSchimmelpfennig, Irene
dc.contributor.authorMariño, Jersy
dc.contributor.authorValdivia, David
dc.contributor.authorRademaker, Kurt
dc.contributor.authorVivanco Lopez, Socorro del Pilar
dc.contributor.authorASTER Team
dc.contributor.authorAumaître, Georges
dc.contributor.authorBourlès, Didier
dc.contributor.authorKeddadouche, Karim
dc.coverage.spatialAndes peruanos
dc.date.accessioned2019-12-30T14:08:23Z
dc.date.available2019-12-30T14:08:23Z
dc.date.issued2019-11-07
dc.description.abstractConstraining the age of young lavas, which generally fall outside the effective range of traditional geochronology methods, remains a key challenge in volcanology, limiting the development of high-resolution eruption chronologies. We present an in situ cosmogenic ³He and ³⁶Cl surface-exposure chronology, alongside new minimum-limiting ¹⁴C ages, documenting young eruptions at five sites in the Western Cordillera, southern Peru. Four ³He-dated lavas on the Nevado Coropuna volcanic complex (hitherto thought to be dormant) indicate that the central dome cluster is young and potentially active; two Holocene lavas on the easternmost dome are the youngest directly dated lavas in Peru to date. East of Coropuna, lava domes and block-lava flows represent the most extensive output to date of Nevado Sabancaya, one of Peru’s most active volcanoes. Two ³He measurements confirm the Holocene age of these deposits and expand the chronology for one of the youngest major lava fields in Peru. ³⁶Cl surface-exposure ages from the Purupurini dome cluster and Nevado Casiri document middle-late-Holocene episodes of effusive activity, while basal ¹⁴C ages from a lavadammed wetland constrain an effusive eruption at Mina Arcata, north of Coropuna, to the late-glacial period. These new data advance the recent Western Cordillera volcanic record whilst demonstrating both the considerable potential and fundamental limitations of cosmogenic surface-exposure methods for such applications.es_ES
dc.description.peer-reviewPor pareses_ES
dc.formatapplication/pdfes_ES
dc.identifier.citationBromley, G. R. M., Thouret, J. C., Schimmelpfennig, I., Mariño, J., Valdivia, D., Rademaker, K., ... Keddadouche, K. (2019). In situ cosmogenic 3 He and 36 Cl and radiocarbon dating of volcanic deposits refine the Pleistocene and Holocene eruption chronology of SW Peru.==$Bulletin of Volcanology, 81$==(64), 1-16. https://doi.org/10.1007/s00445-019-1325-6es_ES
dc.identifier.doihttps://doi.org/10.1007/s00445-019-1325-6es_ES
dc.identifier.govdocindex-oti2018
dc.identifier.journalBulletin of Volcanologyes_ES
dc.identifier.urihttp://hdl.handle.net/20.500.12816/4730
dc.language.isoenges_ES
dc.publisherSpringeres_ES
dc.relation.ispartofurn:issn:0258-8900
dc.rightsinfo:eu-repo/semantics/closedAccesses_ES
dc.subjectCosmogenic surface-exposure datinges_ES
dc.subjectHelium-3es_ES
dc.subjectChlorine-36es_ES
dc.subjectLava flowses_ES
dc.subject14C datinges_ES
dc.subjectPeruvian Andeses_ES
dc.subject.ocdehttp://purl.org/pe-repo/ocde/ford#1.05.00es_ES
dc.subject.ocdehttp://purl.org/pe-repo/ocde/ford#1.05.04es_ES
dc.subject.ocdehttp://purl.org/pe-repo/ocde/ford#1.05.07es_ES
dc.titleIn situ cosmogenic 3He and 36Cl and radiocarbon dating of volcanic deposits refine the Pleistocene and Holocene eruption chronology of SW Perues_ES
dc.typeinfo:eu-repo/semantics/articlees_ES

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