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dc.contributor.author
Torres Carbonell, Pablo Juan
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dc.contributor.author
Rodríguez Arias, Leonardo
dc.contributor.author
Atencio, Mario R.
dc.date.available
2018-10-30T20:02:37Z
dc.date.issued
2017-01
dc.identifier.citation
Torres Carbonell, Pablo Juan; Rodríguez Arias, Leonardo; Atencio, Mario R.; Geometry and kinematics of the Fuegian thrust-fold belt, southernmost Andes; American Geophysical Union; Tectonics; 36; 1; 1-2017; 33-50
dc.identifier.issn
0278-7407
dc.identifier.uri
http://hdl.handle.net/11336/63344
dc.description.abstract
Published balanced structural interpretations of the Fuegian thrust-fold belt (southernmost Andes) fail to address aspects such as basement shortening in the thrust-fold belt or its structural connection with the central belt of the orogen. We tackle this deficiency by constructing four serial balanced cross sections based on surface geologic information, 2-D reflection seismic lines, and well logs, which depict the first-order structural geometry and kinematics from the thrust front to the internal thrust-fold belt. The interpretation reveals three main tectonostratigraphic packages separated by major detachments: basement (Paleozoic-Upper Jurassic), Cretaceous, and Paleogene, all variably involved in thrusting along strike. Minimum shortening in the Paleogene cover ranges between 16% and 43%, and significant style changes are observed across and along the thrust wedge. We show that basement thrust sheets have a major role in the construction of the thrust-fold belt; some of them were emplaced below the thrust front during late Oligocene or early Miocene times. The kinematic evolution of the thrust-fold belt indicates that the active detachments depended on the existence of high pore pressure to propagate forward. Our model shows that this pore pressure buildup was controlled by overburden, mean rock impermeability, and strain rate; the variable interaction among these factors controlled the propagation and style of the thrust wedge.
dc.format
application/pdf
dc.language.iso
eng
dc.publisher
American Geophysical Union
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dc.rights
info:eu-repo/semantics/openAccess
dc.rights.uri
https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
dc.subject
Austral-Magallanes Basin
dc.subject
Basement Thrust Sheet
dc.subject
Fuegian Andes
dc.subject
Overpressured Detachment
dc.subject
Shortening
dc.subject
Structural Style
dc.subject.classification
Meteorología y Ciencias Atmosféricas
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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
Geometry and kinematics of the Fuegian thrust-fold belt, southernmost Andes
dc.type
info:eu-repo/semantics/article
dc.type
info:ar-repo/semantics/artículo
dc.type
info:eu-repo/semantics/publishedVersion
dc.date.updated
2018-10-19T15:03:36Z
dc.journal.volume
36
dc.journal.number
1
dc.journal.pagination
33-50
dc.journal.pais
Estados Unidos
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dc.description.fil
Fil: Torres Carbonell, Pablo Juan. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Austral de Investigaciones Científicas; Argentina
dc.description.fil
Fil: Rodríguez Arias, Leonardo. Ypf S. A.; Argentina
dc.description.fil
Fil: Atencio, Mario R.. Ypf S. A.; Argentina
dc.journal.title
Tectonics
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dc.relation.alternativeid
info:eu-repo/semantics/altIdentifier/doi/http://dx.doi.org/10.1002/2016TC004349
dc.relation.alternativeid
info:eu-repo/semantics/altIdentifier/url/https://agupubs.onlinelibrary.wiley.com/doi/abs/10.1002/2016TC004349
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