162471 20251017144654.0 doi 10.1016/j.jappgeo.2025.105895 sideral 145007 ART-2025-145007 eng Casas-Sainz, Antonio M. Universidad de Zaragoza (orcid)0000-0003-3652-3527 Magnetic anomalies controlled by surficial dynamics and quaternary drainage patterns in volcanic-derived soils (Tuscania, Italy) 2025 Access copy available to the general public Unrestricted Magnetic anomalies in an agricultural area developed over volcanic-derived soils (Tuscania, Lazio region, Italy), resulting from both weathering of tuff and lava flows and transport of detrital grains, show a linear pattern with NW-SE direction and amplitudes between 40 and 100 nT in the intensity of the total field (some of them with dipolar geometry) and up to 50 nT in the vertical magnetic gradient. The location of anomalies partly correlates with the highs and lows of the magnetic susceptibility values measured in situ and from soil samples, that range from 2000 × 10−6 SI to 50000 × 10−6 SI. Magnetite is the main carrier of the magnetic susceptibility, as inferred from thermomagnetic curves, whose reversibility corroborates the volcanic origin of detrital particles. The anomalies obtained, although showing a somewhat irregular orthogonal pattern, are interpreted as the result of the differential concentration of magnetic minerals related to an ancient (Quaternary) drainage system. This is corroborated by the analysis of time-series of orthophotographs, which indicate that the drainage pattern developed in the stepped Quaternary piedmont levels located above the present-day thalwegs shows a geometry consistent with the magnetic anomalies. info:eu-repo/grantAgreement/ES/AEI/PID2023-148256NB-I00 info:eu-repo/grantAgreement/ES/AEI/RYC2018-025646-I info:eu-repo/semantics/openAccess by-nc-nd https://creativecommons.org/licenses/by-nc-nd/4.0/deed.es info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion Román-Berdiel, Teresa Universidad de Zaragoza (orcid)0000-0002-9743-8695 Villalaín, Juan J. Castro-Priego, Manuel Pérez-Polo, Marta Pocoví, Andrés (orcid)0000-0003-3197-4177 Diarte-Blasco, Pilar 2000 428 Universidad de Zaragoza Dpto. Ciencias de la Tierra Área Geodinámica Interna 242 (2025), 105895 [24 pp.] J. appl. geophys. JOURNAL OF APPLIED GEOPHYSICS 0926-9851 2305748 http://zaguan.unizar.es/record/162471/files/texto_completo.pdf Versión publicada 2786919 http://zaguan.unizar.es/record/162471/files/texto_completo.jpg?subformat=icon icon Versión publicada oai:zaguan.unizar.es:162471 articulos driver 2025-10-17-14:37:38 ARTICLE