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dc.contributor.authorGoddard, Andrea L. Stevens
dc.contributor.authorCarrapa, Barbara
dc.date.accessioned2018-08-29T19:59:31Z
dc.date.available2018-08-29T19:59:31Z
dc.date.issued2018-06
dc.identifier.citationStevens Goddard, A. L. and Carrapa, B. (2018), Using basin thermal history to evaluate the role of Miocene–Pliocene flat‐slab subduction in the southern Central Andes (27° S–30° S). Basin Res, 30: 564-585. doi:10.1111/bre.12265en_US
dc.identifier.issn0950091X
dc.identifier.doi10.1111/bre.2018.30.issue-3
dc.identifier.urihttp://hdl.handle.net/10150/628603
dc.description.abstractStudies in both modern and ancient Cordilleran-type orogenic systems suggest that processes associated with flat-slab subduction control the geological and thermal history of the upper plate; however, these effects prove difficult to deconvolve from processes associated with normal subduction in an active orogenic system. We present new geochronological and thermochronological data from four depositional areas in the western Sierras Pampeanas above the Central Andean flat-slab subduction zone between 27 degrees S and 30 degrees S evaluating the spatial and temporal thermal conditions of the Miocene-Pliocene foreland basin. Our results show that a relatively high late Miocene-early Pliocene geothermal gradient of 25-35 degrees C km(-1) was typical of this region. The absence of along-strike geothermal heterogeneities, as would be expected in the case of migrating flat-slab subduction, suggests that either the response of the upper plate to refrigeration may be delayed by several millions of years or that subduction occurred normally throughout this region through the late Miocene. Exhumation of the foreland basin occurred nearly synchronously along strike from 27 to 30 degrees S between ca. 7 Ma and 4 Ma. We propose that coincident flat-slab subduction facilitated this widespread exhumation event. Flexural modelling coupled with geohistory analysis show that dynamic subsidence and/or uplift associated with flat-slab subduction is not required to explain the unique deep and narrow geometry of the foreland basin in the region implying that dynamic processes were a minor component in the creation of accommodation space during Miocene-Pliocene deposition.en_US
dc.description.sponsorshipNSF GRF, National Geographic Young Explorer's Grant [9744-15]; GSA Graduate Student Research Granten_US
dc.language.isoenen_US
dc.publisherWILEYen_US
dc.relation.urlhttp://doi.wiley.com/10.1111/bre.2018.30.issue-3en_US
dc.rights© 2017 The Authors. Basin Research © 2017 John Wiley & Sons Ltd, European Association of Geoscientists & Engineers and International Association of Sedimentologistsen_US
dc.titleUsing basin thermal history to evaluate the role of Miocene-Pliocene flat-slab subduction in the southern Central Andes (27 degrees S-30 degrees S)en_US
dc.typeArticleen_US
dc.contributor.departmentUniv Arizona, Dept Geoscien_US
dc.identifier.journalBASIN RESEARCHen_US
dc.description.note12 month embargo; published online: 01 September 2017en_US
dc.description.collectioninformationThis item from the UA Faculty Publications collection is made available by the University of Arizona with support from the University of Arizona Libraries. If you have questions, please contact us at repository@u.library.arizona.edu.en_US
dc.eprint.versionFinal accepted manuscripten_US
dc.source.journaltitleBasin Research
dc.source.volume30
dc.source.issue3


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