Mostrar el registro sencillo del ítem Bishop, Brandon T. Beck, Susan L. Zandt, George Wagner, Lara S. Long, Maureen D. Tavera, Hernando
dc.coverage.spatial Andes 2018-08-07T14:10:04Z 2018-08-07T14:10:04Z 2018-04-22
dc.identifier.citation Bishop, B., Beck, S., Zandt, G., Wagner, L., Long, M., & Tavera, H. (2018). Foreland uplift during flat subduction: insights from the Peruvian Andes and Fitzcarrald Arch.==$Tectonophysics, 731–732,$==73-84. es_ES
dc.identifier.govdoc index-oti2018
dc.description.abstract Foreland deformation has long been associated with flat-slab subduction, but the precise mechanism linking these two processes remains unclear. One example of foreland deformation corresponding in space and time to flat subduction is the Fitzcarrald Arch, a broad NE-SW trending topographically high feature covering an area of >4 × 10⁵ km² in the Peruvian Andean foreland. Recent imaging of the southern segment of Peruvian flat slab shows that the shallowest part of the slab, which corresponds to the subducted Nazca Ridge northeast of the present intersection of the ridge and the Peruvian trench, extends up to and partly under the southwestern edge of the arch. Here, we evaluate models for the formation of this foreland arch and find that a basal-shear model is most consistent with observations. We calculate that ~5 km of lower crustal thickening would be sufficient to generate the arch's uplift since the late Miocene. This magnitude is consistent with prior observations of unusually thickened crust in the Andes immediately south of the subducted ridge that may also have been induced by flat subduction. This suggests that the Fitzcarrald Arch's formation by the Nazca Ridge may be one of the clearest examples of upper plate deformation induced through basal shear observed in a flat-slab subduction setting. We then explore the more general implications of our results for understanding deformation above flat slabs in the geologic past. es_ES
dc.format application/pdf es_ES
dc.language.iso eng es_ES
dc.publisher Elsevier es_ES
dc.relation.ispartof urn:issn:0040-1951
dc.rights info:eu-repo/semantics/closedAccess es_ES
dc.subject Structural geology es_ES
dc.subject Deformation es_ES
dc.subject Mantle es_ES
dc.subject Lithosphere es_ES
dc.subject Subduction es_ES
dc.subject Tectonics es_ES
dc.subject Tectonic plate es_ES
dc.subject Earth sciences es_ES
dc.title Foreland uplift during flat subduction: insights from the Peruvian Andes and Fitzcarrald Arch es_ES
dc.type info:eu-repo/semantics/article es_ES
dc.subject.ocde es_ES
dc.subject.ocde es_ES
dc.identifier.journal Tectonophysics es_ES
dc.description.peer-review Por pares es_ES
dc.identifier.doi es_ES




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