What were the drivers of hinterland exhumation during flat-slab subduction in the southern Central Andes? Insights from multi-sample thermal history modeling using hefty 2.0 and fe...
- Autores
- Mackaman Lofland, Chelsea; Ketcham, Richard; Fosdick, Julie; Horton, Brian; Lossada, Ana Clara; Stockli, Daniel
- Año de publicación
- 2022
- Idioma
- inglés
- Tipo de recurso
- documento de conferencia
- Estado
- versión publicada
- Descripción
- Flat-slab subduction is acornerstone tectonic process, commonly linked to changes in convergent marginthermal structure, enhanced seismicity, and intraplate shortening and magmatismexpressed hundreds of kilometers from the trench. Yet, the impacts of flat-slabsubduction on hinterland evolution remain poorly understood. We leverage newthermochronological data from the Argentine Frontal Cordillera (a zone of highhinterland topography above the modern flat-slab segment at 29–33ºS) and novelthermal history modeling techniques to interrogate the influence of (1)increased plate coupling, elevated shortening, and structurally-drivenexhumation along emergent or subsurface faults, and/or (2) dynamic upliftassociated with slab flattening and inboard migration of the subduction hinge.New apatite and zircon (U-Th)/He data quantify hinterland cooling duringPaleogene subduction and Neogene flattening of the Nazca oceanic plate. Ourthermal history modeling approach implements a time-elevation extension to the1D HeFTy thermal history modeling program that allows simultaneous inversion ofmultiple samples along a structural or topographic profile. This extensionenables HeFTy to better approximate transient effects such as isothermcompression during rapid exhumation and the transition from geothermal toelevation gradients, and allows for change in the relative depth among samples(e.g., tilting, folding) during the history within user-defined constraints.Multi-sample modeling results from hinterland sample profiles spanning analong-strike distance of >400 km record rapid exhumational cooling coevalwith middle Miocene flattening of the subducted slab, and point tostructurally-driven exhumation: along an orogen-scale fault-bend fold anticlineat 29–31°S, and emergent faults that exhume west-dipping hanging wall panels at~31–33°S. We illustrate the resulting structural, topographic, andthermochronological relationships along two reconstructed 2D geological crosssections using thermokinematic modeling (FETKin software). This researchdemonstrates the utility of multi-sample thermal history modeling in refiningthe results obtained from single-sample modeling approaches, and evaluating thetiming, rates, and drivers of exhumation during changes in subduction.
Fil: Mackaman Lofland, Chelsea. University of Connecticut; Estados Unidos
Fil: Ketcham, Richard. University of Texas; Estados Unidos
Fil: Fosdick, Julie. University of Connecticut; Estados Unidos
Fil: Horton, Brian. University of Texas; Estados Unidos
Fil: Lossada, Ana Clara. Consejo Nacional de Investigaciones Científicas y Técnicas. Oficina de Coordinación Administrativa Ciudad Universitaria. Instituto de Estudios Andinos "Don Pablo Groeber". Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales. Instituto de Estudios Andinos "Don Pablo Groeber"; Argentina
Fil: Stockli, Daniel. University of Texas at Austin; Estados Unidos
Geological Society of America Connects Meeting
Estados Unidos
The Geological Society of America - Materia
-
EXHUMATION
FLAT SLAB SUBDUCTION
SOUTHERN CENTRAL ANDES - Nivel de accesibilidad
- acceso abierto
- Condiciones de uso
- https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
- Repositorio
- Institución
- Consejo Nacional de Investigaciones Científicas y Técnicas
- OAI Identificador
- oai:ri.conicet.gov.ar:11336/228257
Ver los metadatos del registro completo
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What were the drivers of hinterland exhumation during flat-slab subduction in the southern Central Andes? Insights from multi-sample thermal history modeling using hefty 2.0 and fetkin softwareMackaman Lofland, ChelseaKetcham, RichardFosdick, JulieHorton, BrianLossada, Ana ClaraStockli, DanielEXHUMATIONFLAT SLAB SUBDUCTIONSOUTHERN CENTRAL ANDEShttps://purl.org/becyt/ford/1.5https://purl.org/becyt/ford/1Flat-slab subduction is acornerstone tectonic process, commonly linked to changes in convergent marginthermal structure, enhanced seismicity, and intraplate shortening and magmatismexpressed hundreds of kilometers from the trench. Yet, the impacts of flat-slabsubduction on hinterland evolution remain poorly understood. We leverage newthermochronological data from the Argentine Frontal Cordillera (a zone of highhinterland topography above the modern flat-slab segment at 29–33ºS) and novelthermal history modeling techniques to interrogate the influence of (1)increased plate coupling, elevated shortening, and structurally-drivenexhumation along emergent or subsurface faults, and/or (2) dynamic upliftassociated with slab flattening and inboard migration of the subduction hinge.New apatite and zircon (U-Th)/He data quantify hinterland cooling duringPaleogene subduction and Neogene flattening of the Nazca oceanic plate. Ourthermal history modeling approach implements a time-elevation extension to the1D HeFTy thermal history modeling program that allows simultaneous inversion ofmultiple samples along a structural or topographic profile. This extensionenables HeFTy to better approximate transient effects such as isothermcompression during rapid exhumation and the transition from geothermal toelevation gradients, and allows for change in the relative depth among samples(e.g., tilting, folding) during the history within user-defined constraints.Multi-sample modeling results from hinterland sample profiles spanning analong-strike distance of >400 km record rapid exhumational cooling coevalwith middle Miocene flattening of the subducted slab, and point tostructurally-driven exhumation: along an orogen-scale fault-bend fold anticlineat 29–31°S, and emergent faults that exhume west-dipping hanging wall panels at~31–33°S. We illustrate the resulting structural, topographic, andthermochronological relationships along two reconstructed 2D geological crosssections using thermokinematic modeling (FETKin software). This researchdemonstrates the utility of multi-sample thermal history modeling in refiningthe results obtained from single-sample modeling approaches, and evaluating thetiming, rates, and drivers of exhumation during changes in subduction.Fil: Mackaman Lofland, Chelsea. University of Connecticut; Estados UnidosFil: Ketcham, Richard. University of Texas; Estados UnidosFil: Fosdick, Julie. University of Connecticut; Estados UnidosFil: Horton, Brian. University of Texas; Estados UnidosFil: Lossada, Ana Clara. Consejo Nacional de Investigaciones Científicas y Técnicas. Oficina de Coordinación Administrativa Ciudad Universitaria. Instituto de Estudios Andinos "Don Pablo Groeber". Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales. Instituto de Estudios Andinos "Don Pablo Groeber"; ArgentinaFil: Stockli, Daniel. University of Texas at Austin; Estados UnidosGeological Society of America Connects MeetingEstados UnidosThe Geological Society of AmericaThe Geological Society of America2022info:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/conferenceObjectReuniónBookhttp://purl.org/coar/resource_type/c_5794info:ar-repo/semantics/documentoDeConferenciaapplication/pdfapplication/vnd.openxmlformats-officedocument.wordprocessingml.documentapplication/pdfapplication/pdfhttp://hdl.handle.net/11336/228257What were the drivers of hinterland exhumation during flat-slab subduction in the southern Central Andes? Insights from multi-sample thermal history modeling using hefty 2.0 and fetkin software; Geological Society of America Connects Meeting; Estados Unidos; 2022CONICET DigitalCONICETenginfo:eu-repo/semantics/altIdentifier/url/https://gsa.confex.com/gsa/2022AM/meetingapp.cgi/Paper/381296Internacionalinfo:eu-repo/semantics/openAccesshttps://creativecommons.org/licenses/by-nc-sa/2.5/ar/reponame:CONICET Digital (CONICET)instname:Consejo Nacional de Investigaciones Científicas y Técnicas2025-09-03T10:00:12Zoai:ri.conicet.gov.ar:11336/228257instacron:CONICETInstitucionalhttp://ri.conicet.gov.ar/Organismo científico-tecnológicoNo correspondehttp://ri.conicet.gov.ar/oai/requestdasensio@conicet.gov.ar; lcarlino@conicet.gov.arArgentinaNo correspondeNo correspondeNo correspondeopendoar:34982025-09-03 10:00:12.681CONICET Digital (CONICET) - Consejo Nacional de Investigaciones Científicas y Técnicasfalse |
dc.title.none.fl_str_mv |
What were the drivers of hinterland exhumation during flat-slab subduction in the southern Central Andes? Insights from multi-sample thermal history modeling using hefty 2.0 and fetkin software |
title |
What were the drivers of hinterland exhumation during flat-slab subduction in the southern Central Andes? Insights from multi-sample thermal history modeling using hefty 2.0 and fetkin software |
spellingShingle |
What were the drivers of hinterland exhumation during flat-slab subduction in the southern Central Andes? Insights from multi-sample thermal history modeling using hefty 2.0 and fetkin software Mackaman Lofland, Chelsea EXHUMATION FLAT SLAB SUBDUCTION SOUTHERN CENTRAL ANDES |
title_short |
What were the drivers of hinterland exhumation during flat-slab subduction in the southern Central Andes? Insights from multi-sample thermal history modeling using hefty 2.0 and fetkin software |
title_full |
What were the drivers of hinterland exhumation during flat-slab subduction in the southern Central Andes? Insights from multi-sample thermal history modeling using hefty 2.0 and fetkin software |
title_fullStr |
What were the drivers of hinterland exhumation during flat-slab subduction in the southern Central Andes? Insights from multi-sample thermal history modeling using hefty 2.0 and fetkin software |
title_full_unstemmed |
What were the drivers of hinterland exhumation during flat-slab subduction in the southern Central Andes? Insights from multi-sample thermal history modeling using hefty 2.0 and fetkin software |
title_sort |
What were the drivers of hinterland exhumation during flat-slab subduction in the southern Central Andes? Insights from multi-sample thermal history modeling using hefty 2.0 and fetkin software |
dc.creator.none.fl_str_mv |
Mackaman Lofland, Chelsea Ketcham, Richard Fosdick, Julie Horton, Brian Lossada, Ana Clara Stockli, Daniel |
author |
Mackaman Lofland, Chelsea |
author_facet |
Mackaman Lofland, Chelsea Ketcham, Richard Fosdick, Julie Horton, Brian Lossada, Ana Clara Stockli, Daniel |
author_role |
author |
author2 |
Ketcham, Richard Fosdick, Julie Horton, Brian Lossada, Ana Clara Stockli, Daniel |
author2_role |
author author author author author |
dc.subject.none.fl_str_mv |
EXHUMATION FLAT SLAB SUBDUCTION SOUTHERN CENTRAL ANDES |
topic |
EXHUMATION FLAT SLAB SUBDUCTION SOUTHERN CENTRAL ANDES |
purl_subject.fl_str_mv |
https://purl.org/becyt/ford/1.5 https://purl.org/becyt/ford/1 |
dc.description.none.fl_txt_mv |
Flat-slab subduction is acornerstone tectonic process, commonly linked to changes in convergent marginthermal structure, enhanced seismicity, and intraplate shortening and magmatismexpressed hundreds of kilometers from the trench. Yet, the impacts of flat-slabsubduction on hinterland evolution remain poorly understood. We leverage newthermochronological data from the Argentine Frontal Cordillera (a zone of highhinterland topography above the modern flat-slab segment at 29–33ºS) and novelthermal history modeling techniques to interrogate the influence of (1)increased plate coupling, elevated shortening, and structurally-drivenexhumation along emergent or subsurface faults, and/or (2) dynamic upliftassociated with slab flattening and inboard migration of the subduction hinge.New apatite and zircon (U-Th)/He data quantify hinterland cooling duringPaleogene subduction and Neogene flattening of the Nazca oceanic plate. Ourthermal history modeling approach implements a time-elevation extension to the1D HeFTy thermal history modeling program that allows simultaneous inversion ofmultiple samples along a structural or topographic profile. This extensionenables HeFTy to better approximate transient effects such as isothermcompression during rapid exhumation and the transition from geothermal toelevation gradients, and allows for change in the relative depth among samples(e.g., tilting, folding) during the history within user-defined constraints.Multi-sample modeling results from hinterland sample profiles spanning analong-strike distance of >400 km record rapid exhumational cooling coevalwith middle Miocene flattening of the subducted slab, and point tostructurally-driven exhumation: along an orogen-scale fault-bend fold anticlineat 29–31°S, and emergent faults that exhume west-dipping hanging wall panels at~31–33°S. We illustrate the resulting structural, topographic, andthermochronological relationships along two reconstructed 2D geological crosssections using thermokinematic modeling (FETKin software). This researchdemonstrates the utility of multi-sample thermal history modeling in refiningthe results obtained from single-sample modeling approaches, and evaluating thetiming, rates, and drivers of exhumation during changes in subduction. Fil: Mackaman Lofland, Chelsea. University of Connecticut; Estados Unidos Fil: Ketcham, Richard. University of Texas; Estados Unidos Fil: Fosdick, Julie. University of Connecticut; Estados Unidos Fil: Horton, Brian. University of Texas; Estados Unidos Fil: Lossada, Ana Clara. Consejo Nacional de Investigaciones Científicas y Técnicas. Oficina de Coordinación Administrativa Ciudad Universitaria. Instituto de Estudios Andinos "Don Pablo Groeber". Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales. Instituto de Estudios Andinos "Don Pablo Groeber"; Argentina Fil: Stockli, Daniel. University of Texas at Austin; Estados Unidos Geological Society of America Connects Meeting Estados Unidos The Geological Society of America |
description |
Flat-slab subduction is acornerstone tectonic process, commonly linked to changes in convergent marginthermal structure, enhanced seismicity, and intraplate shortening and magmatismexpressed hundreds of kilometers from the trench. Yet, the impacts of flat-slabsubduction on hinterland evolution remain poorly understood. We leverage newthermochronological data from the Argentine Frontal Cordillera (a zone of highhinterland topography above the modern flat-slab segment at 29–33ºS) and novelthermal history modeling techniques to interrogate the influence of (1)increased plate coupling, elevated shortening, and structurally-drivenexhumation along emergent or subsurface faults, and/or (2) dynamic upliftassociated with slab flattening and inboard migration of the subduction hinge.New apatite and zircon (U-Th)/He data quantify hinterland cooling duringPaleogene subduction and Neogene flattening of the Nazca oceanic plate. Ourthermal history modeling approach implements a time-elevation extension to the1D HeFTy thermal history modeling program that allows simultaneous inversion ofmultiple samples along a structural or topographic profile. This extensionenables HeFTy to better approximate transient effects such as isothermcompression during rapid exhumation and the transition from geothermal toelevation gradients, and allows for change in the relative depth among samples(e.g., tilting, folding) during the history within user-defined constraints.Multi-sample modeling results from hinterland sample profiles spanning analong-strike distance of >400 km record rapid exhumational cooling coevalwith middle Miocene flattening of the subducted slab, and point tostructurally-driven exhumation: along an orogen-scale fault-bend fold anticlineat 29–31°S, and emergent faults that exhume west-dipping hanging wall panels at~31–33°S. We illustrate the resulting structural, topographic, andthermochronological relationships along two reconstructed 2D geological crosssections using thermokinematic modeling (FETKin software). This researchdemonstrates the utility of multi-sample thermal history modeling in refiningthe results obtained from single-sample modeling approaches, and evaluating thetiming, rates, and drivers of exhumation during changes in subduction. |
publishDate |
2022 |
dc.date.none.fl_str_mv |
2022 |
dc.type.none.fl_str_mv |
info:eu-repo/semantics/publishedVersion info:eu-repo/semantics/conferenceObject Reunión Book http://purl.org/coar/resource_type/c_5794 info:ar-repo/semantics/documentoDeConferencia |
status_str |
publishedVersion |
format |
conferenceObject |
dc.identifier.none.fl_str_mv |
http://hdl.handle.net/11336/228257 What were the drivers of hinterland exhumation during flat-slab subduction in the southern Central Andes? Insights from multi-sample thermal history modeling using hefty 2.0 and fetkin software; Geological Society of America Connects Meeting; Estados Unidos; 2022 CONICET Digital CONICET |
url |
http://hdl.handle.net/11336/228257 |
identifier_str_mv |
What were the drivers of hinterland exhumation during flat-slab subduction in the southern Central Andes? Insights from multi-sample thermal history modeling using hefty 2.0 and fetkin software; Geological Society of America Connects Meeting; Estados Unidos; 2022 CONICET Digital CONICET |
dc.language.none.fl_str_mv |
eng |
language |
eng |
dc.relation.none.fl_str_mv |
info:eu-repo/semantics/altIdentifier/url/https://gsa.confex.com/gsa/2022AM/meetingapp.cgi/Paper/381296 |
dc.rights.none.fl_str_mv |
info:eu-repo/semantics/openAccess https://creativecommons.org/licenses/by-nc-sa/2.5/ar/ |
eu_rights_str_mv |
openAccess |
rights_invalid_str_mv |
https://creativecommons.org/licenses/by-nc-sa/2.5/ar/ |
dc.format.none.fl_str_mv |
application/pdf application/vnd.openxmlformats-officedocument.wordprocessingml.document application/pdf application/pdf |
dc.coverage.none.fl_str_mv |
Internacional |
dc.publisher.none.fl_str_mv |
The Geological Society of America |
publisher.none.fl_str_mv |
The Geological Society of America |
dc.source.none.fl_str_mv |
reponame:CONICET Digital (CONICET) instname:Consejo Nacional de Investigaciones Científicas y Técnicas |
reponame_str |
CONICET Digital (CONICET) |
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CONICET Digital (CONICET) |
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Consejo Nacional de Investigaciones Científicas y Técnicas |
repository.name.fl_str_mv |
CONICET Digital (CONICET) - Consejo Nacional de Investigaciones Científicas y Técnicas |
repository.mail.fl_str_mv |
dasensio@conicet.gov.ar; lcarlino@conicet.gov.ar |
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13.13397 |