Fault-Driven Differential Exhumation in a Transpressional Tectonic Setting: A Combined Microstructural and Thermochronologic Approach From the Liquiñe-Ofqui Fault System, Southern Andes (39°S)

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dc.article.numbere2022TC007229
dc.catalogadordfo
dc.contributor.authorRoquer Rodríguez, Tomás Esteban
dc.contributor.authorArancibia Hernández, Gloria Cecilia
dc.contributor.authorSeymour N.M.
dc.contributor.authorVeloso Espinosa, Eugenio Andrés
dc.contributor.authorRowland J.
dc.contributor.authorStockli D.F.
dc.contributor.authorJons N.
dc.contributor.authorMorata D.
dc.date.accessioned2024-05-07T15:23:52Z
dc.date.available2024-05-07T15:23:52Z
dc.date.issued2023
dc.description.abstractCrustal deformation in transpressive tectonic settings is partitioned across fault-bounded tectonic blocks whose borders may represent ideal loci for enhanced rock exhumation. Field and petrographic analysis, geothermobarometry, zircon U-Pb geochronology, and zircon and apatite (U-Th)/He thermochronology were applied to intrusive and metamorphic rocks to investigate exhumation patterns of fault blocks delimited by the Liquiñe-Ofqui Fault System (LOFS), Southern Andes (39°S). Our integrated analyses document the relative influences of magmatism, fault-driven differential exhumation, and fault-controlled geothermal flow along the LOFS. Magmatism was concentrated in the Early to Late Jurassic (∼182–151 Ma), Early Cretaceous (∼116–104 Ma), and Miocene (∼17–6 Ma). Dextral mylonitic deformation was most likely coeval with the Miocene pulse of magmatism. Tectonic exhumation occurred across a positive flower structure during the Late Miocene to Early Pleistocene (∼6–2 Ma), and affected kilometric-scale tectonic blocks bound by N-striking, steeply dipping faults of the LOFS. Fault-controlled geothermal flow occurred from the Early Pleistocene to the present-day (∼1.5 Ma-present). Our results suggest that individual faults not only facilitate exhumation of tectonic blocks but also act as pathways for long-term hydrothermal fluid flow.
dc.description.funderANID-FONDAP
dc.description.funderANID-FONDECYT
dc.description.funderANID‐FONDAP
dc.description.funderANID‐FONDECYT
dc.description.funderNational Science Foundation EAR
dc.description.funderNational Agency for Research and Development
dc.description.funderANID
dc.fuente.origenScopus
dc.fuente.origenORCID
dc.identifier.doi10.1029/2022TC007229
dc.identifier.eissn1944-9194
dc.identifier.issn0278-7407
dc.identifier.scopusidSCOPUS_ID:85148716181
dc.identifier.urihttps://repositorio.uc.cl/handle/11534/85479
dc.information.autorucEscuela de Ingeniería; Roquer Rodriguez Tomas Esteban; S/I; 186154
dc.information.autorucEscuela de Ingeniería; Arancibia Hernandez Gloria Cecilia; 0000-0003-2860-1302; 1008583
dc.information.autorucEscuela de Ingeniería; Veloso Espinosa Eugenio Andres; S/I; 1025241
dc.issue.numero2
dc.language.isoen
dc.nota.accesoContenido parcial
dc.pagina.final28
dc.pagina.inicio1
dc.revistaTectonics
dc.rightsacceso restringido
dc.subjectGeochronology
dc.subjectNorth Patagonian Batholith
dc.subjectRock exhumation
dc.subjectThermobarometry
dc.titleFault-Driven Differential Exhumation in a Transpressional Tectonic Setting: A Combined Microstructural and Thermochronologic Approach From the Liquiñe-Ofqui Fault System, Southern Andes (39°S)
dc.typeartículo
dc.volumen42
sipa.codpersvinculados186154
sipa.codpersvinculados1008583
sipa.codpersvinculados1025241
sipa.trazabilidadSCOPUS;2023-08-23
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