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dc.contributor.author
Wolfram, Lauren C.
dc.contributor.author
Weinberg, Roberto F.
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dc.contributor.author
Nebel, Oliver
dc.contributor.author
Hamza, Kais
dc.contributor.author
Hasalová, Pavlína
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dc.contributor.author
Míková, Jitka
dc.contributor.author
Becchio, Raul Alberto
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dc.date.available
2020-11-11T19:14:07Z
dc.date.issued
2019-03
dc.identifier.citation
Wolfram, Lauren C.; Weinberg, Roberto F.; Nebel, Oliver; Hamza, Kais; Hasalová, Pavlína; et al.; A 60-Myr record of continental back-arc differentiation through cyclic melting; Nature Publishing Group; Nature Geoscience; 12; 3; 3-2019; 215-219
dc.identifier.issn
1752-0894
dc.identifier.uri
http://hdl.handle.net/11336/118185
dc.description.abstract
Continental crust forms and evolves above subduction zones as a result of heat and mass transfer from the mantle below. The nature and extent of this transfer remain debated. Although it has been recognized that arc magmatism at active continental margins can be cyclical at 50- to 1-Myr timescales, such cyclicity has not been recognized in the back-arc. Here we investigate the melting of sedimentary rocks in the continental back-arc of the western Gondwana margin during the Cambrian–Ordovician Famatinian orogeny of Northwest Argentina. We determine the U−Pb ages of zircons that formed during crustal melting and find that they range from 505 to 440 million years ago, concentrated into age groups spaced by 10–15 Myr. This suggests multiple and cyclical melting events in the continental back-arc, which matches the more than 60 Myr duration of the magmatic activity in the arc and demonstrates that thermal and magmatic cyclicity also extends to the continental hinterland. We conclude that back-arc melting reflects a long-lasting, pulsating, cyclical heat transfer from mantle to crust that leads to thorough crustal reworking, transforming sedimentary rocks into crystalline continental crust. Thus, while magma transfer from the mantle promotes crustal growth in convergent margins, cyclical melting promotes crustal maturation of the back-arc.
dc.format
application/pdf
dc.language.iso
eng
dc.publisher
Nature Publishing Group
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dc.rights
info:eu-repo/semantics/restrictedAccess
dc.rights.uri
https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
dc.subject
CICLICITY
dc.subject
ANATECTIC GRANITE
dc.subject
REMELTING
dc.subject
QUILMES
dc.subject.classification
Geoquímica y Geofísica
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dc.subject.classification
Ciencias de la Tierra y relacionadas con el Medio Ambiente
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dc.subject.classification
CIENCIAS NATURALES Y EXACTAS
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dc.title
A 60-Myr record of continental back-arc differentiation through cyclic melting
dc.type
info:eu-repo/semantics/article
dc.type
info:ar-repo/semantics/artículo
dc.type
info:eu-repo/semantics/publishedVersion
dc.date.updated
2020-11-11T12:32:56Z
dc.journal.volume
12
dc.journal.number
3
dc.journal.pagination
215-219
dc.journal.pais
Reino Unido
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dc.journal.ciudad
Londres
dc.description.fil
Fil: Wolfram, Lauren C.. Monash University; Australia
dc.description.fil
Fil: Weinberg, Roberto F.. Monash University; Australia
dc.description.fil
Fil: Nebel, Oliver. Monash University; Australia
dc.description.fil
Fil: Hamza, Kais. Monash University; Australia
dc.description.fil
Fil: Hasalová, Pavlína. Czech Geological Survey; República Checa
dc.description.fil
Fil: Míková, Jitka. Czech Geological Survey; República Checa
dc.description.fil
Fil: Becchio, Raul Alberto. Universidad Nacional de Salta; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina
dc.journal.title
Nature Geoscience
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dc.relation.alternativeid
info:eu-repo/semantics/altIdentifier/doi/http://dx.doi.org/10.1038/s41561-019-0298-6
dc.relation.alternativeid
info:eu-repo/semantics/altIdentifier/url/https://www.nature.com/articles/s41561-019-0298-6
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