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dc.contributor.author
Farias, Pablo
dc.contributor.author
Weinberg, Roberto F.
dc.contributor.author
Sola, Alfonso Manuel
dc.contributor.author
Finch, Melanie
dc.date.available
2024-03-13T11:00:22Z
dc.date.issued
2023-03
dc.identifier.citation
Farias, Pablo; Weinberg, Roberto F.; Sola, Alfonso Manuel; Finch, Melanie; Protracted Thermal Evolution of a Migmatitic Terrane as Revealed by Multiple Geochronometers From the Retro-Arc of the Early Paleozoic Famatinian Orogen in NW Argentina; American Geophysical Union; Tectonics; 42; 3; 3-2023; 1-31
dc.identifier.issn
0278-7407
dc.identifier.uri
http://hdl.handle.net/11336/230266
dc.description.abstract
U-Pb dates of zircon, monazite, and titanite combined with trace element composition, allows characterization of the thermal evolution of the migmatitic Agua del Sapo complex. This complex comprises Al-rich and Ca-rich metasedimentary rocks with a detrital zircon maximum depositional age of 550 Ma. The rocks record two consecutive early Paleozoic orogenies. During subduction associated with the 550–510 Ma Pampean orogeny, the complex was in the fore-arc region and was intruded by 550–520 Ma granites indicative of anomalous heating possibly related to ridge subduction. During the subsequent 500–440 Ma Famatinian orogeny, the arc migrated trenchwards and the region became part of a retro-arc that underwent melting at upper-amphibolite facies. This event was recorded differently by each of the accessory phases. Detrital zircon cores were overgrown by rare Famatinian rims that range from 500 to 420 Ma, while monazite records only Famatinian dates with a growth peak at ∼457 Ma that extends to 410 Ma, possibly due to coupled dissolution-precipitation. Published titanite dates define a 120 Myr thermal history, starting at ∼500 Ma with temperatures of ∼750°C ± 25°C, ending at 380 Ma and ∼700°C ± 25°C. Cooling was accompanied by a decrease in titanite light rare earth element contents in response to increased abundance of allanite/epidote. Thus, the complementary time-compositional record of the accessory phases reveals continued high heat flow, associated with deformation, to 380 Ma. This prolonged event blurs the boundary between the Famatinian and the subsequent Achalian/Chanic orogenies and extends the Silurian Rinconada tectonic phase of the Famatinian orogeny to the east into the Eastern Sierras Pampeanas.
dc.format
application/pdf
dc.language.iso
eng
dc.publisher
American Geophysical Union
dc.rights
info:eu-repo/semantics/openAccess
dc.rights.uri
https://creativecommons.org/licenses/by-nc-nd/2.5/ar/
dc.subject
Famatinian Orogen
dc.subject
Retro-Arc
dc.subject
NW Argentina
dc.subject
Multiple Geochronometers
dc.subject.classification
Geología
dc.subject.classification
Ciencias de la Tierra y relacionadas con el Medio Ambiente
dc.subject.classification
CIENCIAS NATURALES Y EXACTAS
dc.title
Protracted Thermal Evolution of a Migmatitic Terrane as Revealed by Multiple Geochronometers From the Retro-Arc of the Early Paleozoic Famatinian Orogen in NW Argentina
dc.type
info:eu-repo/semantics/article
dc.type
info:ar-repo/semantics/artículo
dc.type
info:eu-repo/semantics/publishedVersion
dc.date.updated
2024-03-12T11:11:43Z
dc.identifier.eissn
1944-9194
dc.journal.volume
42
dc.journal.number
3
dc.journal.pagination
1-31
dc.journal.pais
Estados Unidos
dc.description.fil
Fil: Farias, Pablo. Monash University; Australia
dc.description.fil
Fil: Weinberg, Roberto F.. Monash University; Australia
dc.description.fil
Fil: Sola, Alfonso Manuel. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Salta. Instituto de Bio y Geociencias del NOA. Universidad Nacional de Salta. Facultad de Ciencias Naturales. Museo de Ciencias Naturales. Instituto de Bio y Geociencias del NOA; Argentina
dc.description.fil
Fil: Finch, Melanie. Monash University; Australia
dc.journal.title
Tectonics
dc.relation.alternativeid
info:eu-repo/semantics/altIdentifier/url/https://agupubs.onlinelibrary.wiley.com/doi/10.1029/2021TC007027
dc.relation.alternativeid
info:eu-repo/semantics/altIdentifier/doi/http://dx.doi.org/10.1029/2021TC007027
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