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dc.contributor.authorAerden, Domingo Gerard 
dc.contributor.authorFarrell, Thomas P.
dc.contributor.authorBaxter, Ethan F.
dc.contributor.authorRuiz Fuentes, Alejandro 
dc.contributor.authorBouybaouene, Mohamed
dc.identifier.citationAerden, D. G. A. M., Farrell, T. P., Baxter, E. F., Stewart, E. M., Ruiz-Fuentes, A., & Bouybaouene, M. (2022). Refined tectonic evolution of the Betic-Rif orogen through integrated 3-D microstructural analysis and Sm-Nd dating of garnet porphyroblasts. Tectonics, 41, e2022TC007366. []es_ES
dc.descriptionAcknowledgments The authors would like to thank Ángel Perandrés-Villegas for preparing the thin sections used for this study, Fátima Linares Ordóñez for X-ray computed micro-tomography scanning, Mike Tappa for assistance with thermal ionization mass spectrometry analysis, Francisco Alonso-Chaves and Fernando Simancas for sending structural data, Whitney Behr, Johannes Glodny, Sean Mulcahy, and an anonymous reviewer for providing helpful reports, and editors Laurent Jolivet and Federico Rossetti for additional comments that helped improve two earlier manuscript versions. EFB gratefully acknowledges support from the NSF Grants EAR-1250497 and PIRE-1545903 as well as start up funds from the Boston College. DA and ARF gratefully acknowledge financial support through Spanish project “DAMAGE” (CGL2016-80687-R AEI/FEDER), and Junta de Andalucía project RNM148, both directed by Jesús Galindo Zaldivar. ARF acknowledges an PhD Grant (FPU) from the Spanish government. Open access fees have been funded by Universidad de Granada /CBUA.es_ES
dc.description.abstractHigh-resolution microstructural analysis of porphyroblast inclusion trails integrated with Sm-Nd garnet geochronology has provided new insight into the tectonic history of the Betic-Rif orogen. Three principal age groups of porphyroblasts are demonstrated with distinctly oriented inclusion-trails. Inclusion-trail curvature axes or “FIA” (Foliation Inflexion/Intersection Axes) are shown to represent “fossilized” crenulation axes from which a succession of different crustal shortening directions can be deduced. The regional consistency of microstructural orientations and their geometric relationship with multiple sets of macroscopic folds reveal the composite character of the Gibraltar Arc formed by a superposition of different folding directions and associated lineations. Bulk-garnet ages of 35–22 Ma obtained from five micaschist samples of the Alpujarride-Sebtide complex (ASC) and of 35–13 Ma from four micaschists of the Nevado-Filabride complex (NFC) allow to deduce NNE-SSW directed shortening in the Late Eocene changing to NW-SE shortening in the early Oligocene, alternating with suborthogonal NE-SW shortening during the Miocene. These directions can be related to a major swing in the direction of relative Africa-Iberia plate-motion known from kinematic modeling of magnetic seafloor anomalies, and subsequent dynamic interference between plate convergence and suborthogonal “tectonic escape” of the Alboran Domain. Coupled to previously established P-T-t paths, the new garnet ages support a common tectono-metamorphic evolution of the ASC and NFC as laterally equivalent orogenic domains until, in the Miocene, the second became re-buried under the first.es_ES
dc.description.sponsorshipNSF Grant EAR-1250497es_ES
dc.description.sponsorshipSpanish project “DAMAGE” (CGL2016-80687-R AEI/FEDER)es_ES
dc.description.sponsorshipJunta de Andalucía project RNM148es_ES
dc.description.sponsorshipPhD Grant (FPU) from the Spanish governmentes_ES
dc.description.sponsorshipOpen access fees have been funded by Universidad de Granada /CBUAes_ES
dc.publisherAmerican Geophysical Uniones_ES
dc.rightsAtribución-NoComercial 4.0 Internacional*
dc.titleRefined Tectonic Evolution of the Betic-Rif Orogen Through Integrated 3-D Microstructural Analysis and Sm-Nd Dating of Garnet Porphyroblastses_ES

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