110621 20240319081001.0 doi 10.1016/j.jvolgeores.2021.107443 sideral 127509 ART-2022-127509 eng Simón-Muzás Ana Universidad de Zaragoza (orcid)0000-0001-5824-5367 Axial longitudinal flow in volcaniclastic materials of the Late-Carboniferous-Permian Cadí basin (Southern Pyrenees) determined from Anisotropy of Magnetic Susceptibility 2022 Access copy available to the general public Unrestricted The aim of this work is the application of the anisotropy of magnetic susceptibility (AMS) to the study of volcanic materials from the Late Carboniferous-Permian Cadí basin (southern Pyrenees) in order to (i) explore the limits of this technique in ancient volcanic materials that have undergone strong chemical alteration and a complex tectonic evolution and (ii) provide new insights on the deposition of volcanic materials in this tectonically controlled sedimentary basin. To establish a comparison with the petrofabric of rocks, AMS was complemented with observations and orientation analyses at the outcrop scale, in oriented polished blocks and in thin sections under the microscope. High resolution sampling (620 specimens from 56 sites located in five transects along a sequence 150 m thick) allowed to characterize the volcaniclastic and lava flow series. The AMS results show a fairly constant average magnetic lineation oriented WNW-ESE (in situ and tilt-corrected) and two secondary maxima (N-S to NE-SW in some areas). The magnetic mineralogy analyses indicate the contribution of paramagnetic and ferromagnetic (magnetite, Tc 580 °C) phases to susceptibility. The magnetic fabric has a close relationship with the spatial distribution and orientation of the mineral and grain components of the studied rocks, mainly controlled by depositional processes, with a negligible contribution of the tectonic imprint. Therefore, the magnetic lineation (i.e. K1 axes) can be reliably used as a paleoflow indicator. Nevertheless, it was not possible to establish a clear correspondence between lithological and magnetic fabric types. The results obtained indicate that the AMS approach represents a powerful tool to infer the paleoflow pattern in ancient volcanic and volcaniclastic rocks, even under a priori unfavourable conditions. info:eu-repo/grantAgreement/ES/MCIU/CGL2017-84901-C2-2-P info:eu-repo/grantAgreement/ES/MCIU/FPU19-02353 info:eu-repo/grantAgreement/ES/MCIN/AEI/10.13039/501100011033 info:eu-repo/grantAgreement/ES/MICINN/PID2020-108753GB-C22 info:eu-repo/grantAgreement/ES/MICINN/PID2020-114273GB-C22 info:eu-repo/semantics/openAccess by-nc-nd http://creativecommons.org/licenses/by-nc-nd/3.0/es/ 2.9 2022 GEOSCIENCES, MULTIDISCIPLINARY 88 / 202 = 0.436 2022 Q2 T2 1.107 2022 Geophysics 2022 Q1 Geochemistry and Petrology 2022 Q1 6.2 2022 info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion Casas-Sainz, Antonio Universidad de Zaragoza (orcid)0000-0003-3652-3527 Soto, Ruth Gisbert Aguilar, Josep Universidad de Zaragoza (orcid)0000-0002-3276-5871 Román-Berdiel, Teresa Universidad de Zaragoza (orcid)0000-0002-9743-8695 Oliva-Urcia, Belén Pueyo, Emilio L. Beamud, Elisabeth 2000 685 Universidad de Zaragoza Dpto. Ciencias de la Tierra Área Petrología y Geoquímica 2000 428 Universidad de Zaragoza Dpto. Ciencias de la Tierra Área Geodinámica Interna 421 (2022), 107443 [22 pp] J. volcanol. geotherm. res. JOURNAL OF VOLCANOLOGY AND GEOTHERMAL RESEARCH 0377-0273 13691889 http://zaguan.unizar.es/record/110621/files/texto_completo.pdf Versión publicada 2871241 http://zaguan.unizar.es/record/110621/files/texto_completo.jpg?subformat=icon icon Versión publicada oai:zaguan.unizar.es:110621 articulos driver 2024-03-18-14:11:51 ARTICLE