000071016 001__ 71016
000071016 005__ 20190709135655.0
000071016 0247_ $$2doi$$a10.1002/2017TC004578
000071016 0248_ $$2sideral$$a104296
000071016 037__ $$aART-2017-104296
000071016 041__ $$aeng
000071016 100__ $$aCalvín, P.
000071016 245__ $$aEmplacement and Deformation of Mesozoic Gabbros of the High Atlas (Morocco): Paleomagnetism and Magnetic Fabrics
000071016 260__ $$c2017
000071016 5060_ $$aAccess copy available to the general public$$fUnrestricted
000071016 5203_ $$aA paleomagnetic and magnetic fabric study is performed in Upper Jurassic gabbros of the central High Atlas (Morocco). These gabbros were emplaced in the core of preexisting structures developed during the extensional stage and linked to basement faults. These structures were reactivated as anticlines during the Cenozoic compressional inversion. Gabbros from 19 out of the 33 sampled sites show a stable characteristic magnetization, carried by magnetite, which has been interpreted as a primary component. This component shows an important dispersion due to postemplacement tectonic movements. The absence of paleoposition markers in these igneous rocks precludes direct restorations. A novel approach analyzing the orientation of the primary magnetization is used here to restore the magmatic bodies and to understand the deformational history recorded by these rocks. Paleomagnetic vectors are distributed along small circles with horizontal axes, indicating horizontal axis rotations of the gabbro bodies. These rotations are higher when the ratio between shales and gabbros in the core of the anticlines increases. Due to the uncertainties inherent to this work (the igneous bodies recording strong rotations), interpretations must be qualitative. The magnetic fabric is carried by ferromagnetic (s.s.) minerals mimicking the magmatic fabric. Anisotropy of magnetic susceptibility (AMS) axes, using the rotation routine inferred from paleomagnetic results, result in more tightly clustered magnetic lineations, which also become horizontal and are considered in terms of magma flow trend during its emplacement: NW-SE (parallel to the general extensional direction) in the western sector and NE-SW (parallel to the main faults) in the easternmost structures.
000071016 536__ $$9info:eu-repo/grantAgreement/ES/MINECO/BES-2013-062988$$9info:eu-repo/grantAgreement/ES/MINECO/CGL2012-38481$$9info:eu-repo/grantAgreement/ES/MINECO/CGL2016-77560
000071016 540__ $$9info:eu-repo/semantics/openAccess$$aAll rights reserved$$uhttp://www.europeana.eu/rights/rr-f/
000071016 590__ $$a3.583$$b2017
000071016 591__ $$aGEOCHEMISTRY & GEOPHYSICS$$b18 / 85 = 0.212$$c2017$$dQ1$$eT1
000071016 592__ $$a2.544$$b2017
000071016 593__ $$aGeophysics$$c2017$$dQ1
000071016 593__ $$aGeochemistry and Petrology$$c2017$$dQ1
000071016 655_4 $$ainfo:eu-repo/semantics/article$$vinfo:eu-repo/semantics/publishedVersion
000071016 700__ $$aRuiz-Martínez, V.C.
000071016 700__ $$aVillalaín, J.J.
000071016 700__ $$0(orcid)0000-0003-3652-3527$$aCasas-Sainz, A.M.$$uUniversidad de Zaragoza
000071016 700__ $$aMoussaid, B.
000071016 7102_ $$12000$$2428$$aUniversidad de Zaragoza$$bDpto. Ciencias de la Tierra$$cÁrea Geodinámica Interna
000071016 773__ $$g36, 12 (2017), 3012-3037$$pTectonics$$tTECTONICS$$x0278-7407
000071016 8564_ $$s901667$$uhttps://zaguan.unizar.es/record/71016/files/texto_completo.pdf$$yVersión publicada
000071016 8564_ $$s123818$$uhttps://zaguan.unizar.es/record/71016/files/texto_completo.jpg?subformat=icon$$xicon$$yVersión publicada
000071016 909CO $$ooai:zaguan.unizar.es:71016$$particulos$$pdriver
000071016 951__ $$a2019-07-09-12:45:39
000071016 980__ $$aARTICLE