2017
DOI: 10.1002/2016tc004358
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Superposed and refolded metamorphic isograds and superposed directions of shear during late orogenic extension in the Alborán Domain, southern Spain

Abstract: The timing, kinematics, and mode of exhumation within the Alpujárride Complex, the largest tectonic unit of the Alborán Domain, are controversial. Alternative tectonic models include synorogenic exhumation during pre‐Miocene crustal thickening, intraorogenic exhumation during repeated phases of contraction and extension, and late orogenic exhumation during early Miocene crustal thinning. New structural and petrographic relationships documented in this study support the latter model: subhorizontal foliations, s… Show more

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Cited by 13 publications
(3 citation statements)
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References 136 publications
(277 reference statements)
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“…This author correlates the upper unit with the Los Reales unit of the western Betics. In contrast, Williams and Platt (2017, 2018) consider all Alpujarride outcrops of the central‐ and eastern Betics equivalent to the Los Reales unit and attribute tectonic subdivisions to syn‐ and post‐metamorphic recumbent (F3) folds and (D4) extensional detachments. Another group of workers, however, interprets the same folds and part of the D4 detachments as products of a late crustal shortening and thrusting following (D2) crustal extension (Azañón & Crespo‐Blanc, 2000; Rossetti et al., 2005; Simancas, 2018).…”
Section: Geological Settingmentioning
confidence: 99%
“…This author correlates the upper unit with the Los Reales unit of the western Betics. In contrast, Williams and Platt (2017, 2018) consider all Alpujarride outcrops of the central‐ and eastern Betics equivalent to the Los Reales unit and attribute tectonic subdivisions to syn‐ and post‐metamorphic recumbent (F3) folds and (D4) extensional detachments. Another group of workers, however, interprets the same folds and part of the D4 detachments as products of a late crustal shortening and thrusting following (D2) crustal extension (Azañón & Crespo‐Blanc, 2000; Rossetti et al., 2005; Simancas, 2018).…”
Section: Geological Settingmentioning
confidence: 99%
“…Pervasive ductile shear within the sequence and along the MCT shear zone emplaced hot rocks over colder rocks, overturning the synkinematic isotherms at the midcrustal level (e.g., Beaumont et al, 2004); peak temperature isotherms (if preserved in the rock record) were subsequently sheared and variably overprinted by ongoing ductile shear under retrograde conditions. A fine example of such a process was documented by Williams and Platt (2017) in the Alborán Domain, southern Spain.…”
Section: Kinematic Models For the Inverted Temperature Gradient In Thmentioning
confidence: 99%
“…Understanding the structural evolution of crustal-scale shear zones provides important constraints for models of tectonic deformation (e.g., Sibson, 1977;Handy et al, 2007;Faulkner et al, 2010). Unravelling these constraints from the geological record is difficult due to the overprinting nature of progressive and/or polyphase deformation, which may be recorded within a single shear zone over a variable range of pressures and temperatures (e.g., Price et al, 2016;Williams and Platt, 2017;Hunter et al, 2018;Wallis et al, 2018). Here, we present field and microstructural observations from the Yukon River shear zone ( fig.…”
Section: Introductionmentioning
confidence: 99%