Show simple item record

dc.creatorGazel Dondi, Esteban
dc.creatorHayes, Jorden L.
dc.creatorUlloa Carmiol, Andrés
dc.creatorAlfaro Gálvez, Aristides
dc.creatorColeman, Drew S.
dc.creatorCarr, Michael J.
dc.date.accessioned2023-08-04T20:14:00Z
dc.date.available2023-08-04T20:14:00Z
dc.date.issued2020-07
dc.identifier.citationhttps://agupubs.onlinelibrary.wiley.com/doi/full/10.1029/2018GC008128es_ES
dc.identifier.issn1525-2027
dc.identifier.urihttps://hdl.handle.net/10669/89796
dc.description.abstractThe Talamanca Cordillera in the Central America Arc (Costa Rica‐Panama) preserves the record of the geochemical evolution from an intraoceanic arc to a juvenile continental arc in an active subduction zone, making it a testbed to explore processes that resulted in juvenile continental crust formation and explore potential mechanisms of early continental crust generation. Here we present a comprehensive set of geochronological, geochemical, and petrological data from the Talamanca Cordillera that tracks the key turning point (12-8 Ma) from the evolution of an oceanic arc depleted in incompatible elements to a juvenile continent. Most plutonic rocks from this transition and postintrusive rocks share striking similarities with average upper continental crust and Archean tonalite, trondhjemite, and granodiorite. We complement these data with seismic studies across the arc. Seismic velocities within the Caribbean Plate (basement of the arc) show a relatively uniform lateral structure consistent with a thick mafic large igneous province. Comparisons of seismic velocity profiles in the middle and lower crust beneath the active arc and remnant Miocene arc suggest a transition toward more felsic compositions as the volcanic center migrated toward the location of the modern arc. Seismic velocities along the modern arc in Costa Rica compared with other active arcs and average continental crust suggest an intermediate composition beneath the active arc in Costa Rica closer to average crust. Our geochemical modeling and radiogenic isotopes systematics suggest that input components from melting of the subducting Galapagos hotspot tracks are required for this compositional change.es_ES
dc.language.isoenges_ES
dc.sourceGeochemistry, Geophysics, Geosystems, vol.20(6), pp.2733-2752es_ES
dc.subjectCOSTA RICAes_ES
dc.subjectCENTRAL AMERICAes_ES
dc.subjectEVOLUTIONes_ES
dc.subjectGEOCHEMISTRYes_ES
dc.subjectGEOCHRONOLOGYes_ES
dc.subjectPETROLOGYes_ES
dc.titleThe record of the transition from an oceanic arc to a young continent in the Talamanca Cordilleraes_ES
dc.typeartículo originales_ES
dc.identifier.doi10.1029/2018GC008128
dc.description.procedenceUCR::Vicerrectoría de Investigación::Unidades de Investigación::Ciencias Básicas::Centro de Investigación en Ciencias Geológicas (CICG)es_ES


Files in this item

Thumbnail

This item appears in the following Collection(s)

Show simple item record