000118126 001__ 118126
000118126 005__ 20220908140458.0
000118126 0247_ $$2doi$$a10.1093/gji/ggy481
000118126 0248_ $$2sideral$$a111575
000118126 037__ $$aART-2019-111575
000118126 041__ $$aeng
000118126 100__ $$0(orcid)0000-0002-9743-8695$$aRoman-Berdiel, T.$$uUniversidad de Zaragoza
000118126 245__ $$aOn the influence of magnetic mineralogy in the tectonic interpretation of anisotropy of magnetic susceptibility in cataclastic fault zones
000118126 260__ $$c2019
000118126 5060_ $$aAccess copy available to the general public$$fUnrestricted
000118126 5203_ $$aOf the several factors involved in the development of magnetic fabrics in fault zones at shallow crustal levels, lithology and deformation intensity have probably the most important consequences for the reconstruction of their kinematic history. The basement-involved Cenozoic thrusts in the Demanda Massif (N Spain) provide the opportunity for testing the applicability of anisotropy of magnetic susceptibility (AMS) to the study of deformation in cataclastic fault rocks belonging to shallow fault zones. The Rastraculos thrust is a relatively minor basement thrust (dip-slip movement of 2km defined from cross-sections and geological maps) of Cenozoic age. This thrust contains a re-activated fault zone involving different rock types both belonging to its hangingwall (Palaeozoic) and its footwall (Triassic sandstones and dolostones and Jurassic limestones). AMS results show magnetic foliations parallel or slightly oblique to the fault zone, and both transport-parallel (projected onto the foliation plane) and transport-perpendicular (parallel to the observed intersection lineation) magnetic lineations. The two types of strain/magnetic fabric relationships can be related to deformational and mineralogical features inferred from the direct analysis of thin and polished sections under the microscope and the naked eye, respectively. Analysis of fault rocks in the Rastraculos fault zone indicates that in cataclasites, magnetic fabrics are particularly dependent on lithology and hence magnetic mineralogy. The results obtained prove the usefulness of AMS in fault zones where kinematic indicators are scarce and also give clues on the number of samples necessary to define magnetic susceptibility axes, depending on grain size, ellipsoid shapes and magnetic mineralogy.
000118126 536__ $$9info:eu-repo/grantAgreement/ES/DGA/E32-17R$$9info:eu-repo/grantAgreement/ES/MINECO/CGL2013-42670-P
000118126 540__ $$9info:eu-repo/semantics/openAccess$$aAll rights reserved$$uhttp://www.europeana.eu/rights/rr-f/
000118126 590__ $$a2.574$$b2019
000118126 591__ $$aGEOCHEMISTRY & GEOPHYSICS$$b39 / 84 = 0.464$$c2019$$dQ2$$eT2
000118126 592__ $$a1.339$$b2019
000118126 593__ $$aGeophysics$$c2019$$dQ1
000118126 593__ $$aGeochemistry and Petrology$$c2019$$dQ1
000118126 655_4 $$ainfo:eu-repo/semantics/article$$vinfo:eu-repo/semantics/publishedVersion
000118126 700__ $$0(orcid)0000-0003-3652-3527$$aCasas-Sainz, A.M.$$uUniversidad de Zaragoza
000118126 700__ $$0(orcid)0000-0003-1563-6434$$aOliva-Urcia, B.
000118126 700__ $$aCalvin, P.
000118126 700__ $$aVillalain, J.J.
000118126 7102_ $$12000$$2428$$aUniversidad de Zaragoza$$bDpto. Ciencias de la Tierra$$cÁrea Geodinámica Interna
000118126 773__ $$g216, 2 (2019), 1043-1061$$pGeophys. j. int.$$tGEOPHYSICAL JOURNAL INTERNATIONAL$$x0956-540X
000118126 8564_ $$s20658174$$uhttps://zaguan.unizar.es/record/118126/files/texto_completo.pdf$$yVersión publicada
000118126 8564_ $$s2934212$$uhttps://zaguan.unizar.es/record/118126/files/texto_completo.jpg?subformat=icon$$xicon$$yVersión publicada
000118126 909CO $$ooai:zaguan.unizar.es:118126$$particulos$$pdriver
000118126 951__ $$a2022-09-08-11:33:06
000118126 980__ $$aARTICLE