000088447 001__ 88447
000088447 005__ 20200716101536.0
000088447 0247_ $$2doi$$a10.1029/2019TC005585
000088447 0248_ $$2sideral$$a115392
000088447 037__ $$aART-2019-115392
000088447 041__ $$aeng
000088447 100__ $$aAldega, L.
000088447 245__ $$aUnraveling Multiple Thermotectonic Events Accommodated by Crustal\u2010Scale Faults in Northern Iberia, Spain: Insights From K-Ar Dating of Clay Gouges
000088447 260__ $$c2019
000088447 5060_ $$aAccess copy available to the general public$$fUnrestricted
000088447 5203_ $$aLarge-scale faults in the continental crust are significant features that control the evolution of sedimentary basins and intraplate mountain chains. Deciphering their evolution is a significant task because faults slip and reactivate in a variety of geological settings. In this work, clay gouges of two major orogen-scale, long-lived faults in northern Iberia, the Río Grío and Vallès-Penedès Faults, were investigated by X-ray diffraction and K-Ar isotopic analysis. Illite polytype determinations of 44 subfractions (from <0.1 to 10 Œºm) allowed us to discriminate between authigenic/synkinematic illite crystals formed during faulting and detrital illite crystals inherited from the host rock. K-Ar dating provided a detailed set of ages corresponding to key stages of the thermotectonic evolution of the Iberian Plate: (a) the Permian to Late Triassic extensional/transtensional activity associated to the emplacement of Late Variscan magmatic bodies and hydrothermal mineralizations, (b) the opening of the Central Atlantic Rift during Late Triassic-Early Jurassic times, (c) the Late Jurassic-Early Cretaceous rifting that led to the development of Mesozoic extensional/transtensional basins in northern Iberia, (d) the final stage of the anticlockwise rotation of the Iberian Plate with respect to Eurasia and the accommodation of the first Pyrenean compressional pulses in Campanian time, and (e) the positive inversion of Mesozoic extensional basins due to far-field stresses associated with the Alpine orogeny during the Paleogene. The results highlight that thermotectonic conditions characterized by high-geothermal gradients strongly favor fault movement and neoformation of clay minerals in fault gouges, regardless of the prevailing tectonic regime.
000088447 536__ $$9info:eu-repo/grantAgreement/ES/MINECO/CGL2013-42670-P
000088447 540__ $$9info:eu-repo/semantics/openAccess$$aby$$uhttp://creativecommons.org/licenses/by/3.0/es/
000088447 590__ $$a3.543$$b2019
000088447 591__ $$aGEOCHEMISTRY & GEOPHYSICS$$b18 / 84 = 0.214$$c2019$$dQ1$$eT1
000088447 592__ $$a2.249$$b2019
000088447 593__ $$aGeophysics$$c2019$$dQ1
000088447 593__ $$aGeochemistry and Petrology$$c2019$$dQ1
000088447 655_4 $$ainfo:eu-repo/semantics/article$$vinfo:eu-repo/semantics/publishedVersion
000088447 700__ $$aViola, G.
000088447 700__ $$0(orcid)0000-0003-3652-3527$$aCasas-Sainz, A.$$uUniversidad de Zaragoza
000088447 700__ $$aMarcén, M.$$uUniversidad de Zaragoza
000088447 700__ $$0(orcid)0000-0002-9743-8695$$aRomán-Berdiel, T.$$uUniversidad de Zaragoza
000088447 700__ $$aLelij, R.
000088447 7102_ $$12000$$2428$$aUniversidad de Zaragoza$$bDpto. Ciencias de la Tierra$$cÁrea Geodinámica Interna
000088447 773__ $$g38, 10 (2019), 3629-3651$$pTectonics$$tTectonics$$x0278-7407
000088447 8564_ $$s4529729$$uhttps://zaguan.unizar.es/record/88447/files/texto_completo.pdf$$yVersión publicada
000088447 8564_ $$s48823$$uhttps://zaguan.unizar.es/record/88447/files/texto_completo.jpg?subformat=icon$$xicon$$yVersión publicada
000088447 909CO $$ooai:zaguan.unizar.es:88447$$particulos$$pdriver
000088447 951__ $$a2020-07-16-09:37:17
000088447 980__ $$aARTICLE