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Backarc basin inversion and subcontinental mantle emplacement in the crust: Kilometre-scale folding and shearing at the base of the proto-alborn lithospheric mantle (Betic Cordillera, southern Spain)

Hidas, Karoly; Booth-Rea, Guillermo; Garrido, Carlos J; Martinez-Martinez, Jose Miguel; Padron-Navarta, Jose; Konc, Zoltan; Giaconia, Flavio; Frets, Erwin; Marchesi, C

Description

To constrain the latest evolutionary stages and mechanisms of exhumation and emplacement of subcontinental peridotites in the westernmost Mediterranean, we present here a detailed structural study of the transition from granular spinel peridotite to plagioclase tectonite in the western Ronda Peridotite (Betic Cordillera, southern Spain). We show that the plagioclase tectonite foliation represents an axial surface particularly well developed in the reverse limb of a downward facing moderately...[Show more]

dc.contributor.authorHidas, Karoly
dc.contributor.authorBooth-Rea, Guillermo
dc.contributor.authorGarrido, Carlos J
dc.contributor.authorMartinez-Martinez, Jose Miguel
dc.contributor.authorPadron-Navarta, Jose
dc.contributor.authorKonc, Zoltan
dc.contributor.authorGiaconia, Flavio
dc.contributor.authorFrets, Erwin
dc.contributor.authorMarchesi, C
dc.date.accessioned2015-12-13T22:28:27Z
dc.identifier.issn0016-7649
dc.identifier.urihttp://hdl.handle.net/1885/74218
dc.description.abstractTo constrain the latest evolutionary stages and mechanisms of exhumation and emplacement of subcontinental peridotites in the westernmost Mediterranean, we present here a detailed structural study of the transition from granular spinel peridotite to plagioclase tectonite in the western Ronda Peridotite (Betic Cordillera, southern Spain). We show that the plagioclase tectonite foliation represents an axial surface particularly well developed in the reverse limb of a downward facing moderately plunging and moderately inclined synform at the base of the Ronda massif. The fold limbs are cut by several mylonitic and ultramylonitic shear zones with top-to-the-SW sense of shear. After restoring the middle to late Miocene vertical-axis palaeomag-netic rotation and the early Miocene tectonic tilting of the massif, these studied structures record southward-directed kinematics. We propose a geodynamic model in which folding and shearing of an attenuated mantle lithosphere occurred by backarc basin inversion during late Oligocene (23-25 Ma) southward collision of the Alboran Domain with the palaeo-Maghrebian passive margin, leading to the intracrustal emplacement of peridotites in the earliest Miocene (21-23 Ma).
dc.publisherGeological Society of London
dc.sourceJournal of the Geological Society
dc.subjectKeywords: Back-arc basin; Betic Cordillera; Early Miocene; Evolutionary stage; Geodynamic models; Late Miocene; Late Oligocene; Lithospheric mantle; Mantle lithosphere; Miocene; Shear zone; Southern Spain; Spinel peridotites; Structural studies; Subcontinental mant
dc.titleBackarc basin inversion and subcontinental mantle emplacement in the crust: Kilometre-scale folding and shearing at the base of the proto-alborn lithospheric mantle (Betic Cordillera, southern Spain)
dc.typeJournal article
local.description.notesImported from ARIES
local.identifier.citationvolume170
dc.date.issued2013
local.identifier.absfor040300 - GEOLOGY
local.identifier.ariespublicationf5625xPUB4016
local.type.statusPublished Version
local.contributor.affiliationHidas, Karoly, Universidad de Granada
local.contributor.affiliationBooth-Rea, Guillermo, Instituto Andaluz de Ciencias de la Tierra
local.contributor.affiliationGarrido, Carlos J, Universidad de Granada
local.contributor.affiliationMartinez-Martinez, Jose Miguel, University of Granada
local.contributor.affiliationPadron-Navarta, Jose, College of Physical and Mathematical Sciences, ANU
local.contributor.affiliationKonc, Zoltan, Instituto Andaluz de Ciencias de la Tierra
local.contributor.affiliationGiaconia, Flavio, Instituto Andaluz de Ciencias de la Tierra
local.contributor.affiliationFrets, Erwin, Instituto Andaluz de Ciencias de la Tierra
local.contributor.affiliationMarchesi, C, Universidad de Granada
local.description.embargo2037-12-31
local.bibliographicCitation.issue1
local.bibliographicCitation.startpage47
local.bibliographicCitation.lastpage55
local.identifier.doi10.1144/jgs2011-151
dc.date.updated2016-02-24T09:20:01Z
local.identifier.scopusID2-s2.0-84871898811
CollectionsANU Research Publications

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