169113 20260220145912.0 doi 10.1130/G45158.1 sideral 107983 ART-2018-107983 eng Calvin, P. (orcid)0000-0002-4485-2139 Anisotropic magnetite growth in remagnetized limestones: Tectonic constraints and implications for basin history 2018 Magnetic properties of sedimentary rocks have been commonly exploited to determine the tectonic and chemical evolution of sedimentary basins. We here propose the use of the anisotropy of the anhysteretic remanent magnetization (ARM) to infer the orientation of magnetite grains formed during remagnetization stages, and hence to obtain the tectonic regime during the magnetization period, whose age can also be constrained by paleomagnetic methods. The anisotropy of ARM technique is here applied to remagnetized Jurassic limestones from the Central High Atlas (North Africa). These rocks were remagnetized at ca. 100 Ma during the Cretaceous Normal Superchron in an extensional tectonic setting. The magnetic fabric carried by authigenic magnetite (which is also the carrier of the remagnetization) shows a consistent orientation after a partial bedding correction, which precisely corresponds with the attitude of strata at the time of remagnetization. The anisotropy of the ARM tensor shows a well-defined horizontal lineation parallel to the Mesozoic regional extension, and a horizontal magnetic foliation perpendicular to the lithostatic maximum stress axis. Therefore, our results demonstrate that (1) the magnetite grain growth was consistent with the stress conditions and did not follow any preexisting fabric of the rock, and (2) these grains did not rotate during the subsequent compressional events. info:eu-repo/grantAgreement/ES/MINECO/BES-2013-062988 info:eu-repo/grantAgreement/ES/MINECO/CGL2012-38481 info:eu-repo/grantAgreement/ES/MINECO/CGL2016-77560 info:eu-repo/semantics/closedAccess All rights reserved http://www.europeana.eu/rights/rr-f/ 5.006 2018 GEOLOGY 1 / 46 = 0.022 2018 Q1 T1 2.868 2018 Geology 2018 Q1 info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion Villalain, J.J. Casas-Sainz, A.M. Universidad de Zaragoza (orcid)0000-0003-3652-3527 2000 428 Universidad de Zaragoza Dpto. Ciencias de la Tierra Área Geodinámica Interna 46, 9 (2018), 751-754 Geology Geology 0091-7613 433172 http://zaguan.unizar.es/record/169113/files/texto_completo.pdf Versión publicada 3520410 http://zaguan.unizar.es/record/169113/files/texto_completo.jpg?subformat=icon icon Versión publicada oai:zaguan.unizar.es:169113 articulos driver 2026-02-20-14:58:08 ARTICLE