132445 20260217205505.0 doi 10.1016/j.cretres.2023.105736 sideral 137575 ART-2024-137575 eng Casas, Antonio M. Universidad de Zaragoza (orcid)0000-0003-3652-3527 Magnetic surveying as a proxy for defining cyclicity in thick sedimentary fillings: Application to the Cretaceous Cameros Basin (N Spain) 2024 Access copy available to the general public Unrestricted This work proposes the application of magnetic surveying to the study of cyclicity in sedimentary basins. This application is favoured by the particular bed attitude/topography relationships found in the eastern sector of the Cretaceous Cameros Basin, N Spain. Both the measured total magnetic field (after diurnal correction) and the vertical magnetic gradient, provide a profile (14 cm separation between measurements, in average) of the short-wavelength magnetic anomalies associated with the sedimentary sequence. These anomalies depend on the magnetic susceptibility (dominant for low Koenigsberger ratios, a common scenario in sedimentary rocks), and the magnetic remanence (whose orientation is fairly constant in remagnetised basins) of the different sedimentary units. The comparison with direct measurements of magnetic susceptibility (in the field and in the laboratory) provided a successful double-check. The cyclostratigraphic analysis of magnetic profiles of this 6 km-thick series indicates the existence of cycles of 405 kyr (long eccentricity) and 100–125 kyr (short eccentricity), as well as other lower and higher frequency cycles. Cycles with similar, but slightly different, periodicities are the result of different sedimentation rates (mean of ∼0.2 mm/yr, with values ranging between ∼0.1 and ∼0.36 mm/yr). These results provide and indirect method for dating the basin fill, between the Tithonian–Berriasian boundary and the basalmost Albian (∼143.2–∼112.6 Ma), and impose new constraints for basin evolution. The results obtained open a promising field for quick and reliable determination of magnetic properties and cyclicity in thick sedimentary sequences. info:eu-repo/grantAgreement/ES/DGA/E32-23R info:eu-repo/grantAgreement/ES/MICINN/PID2019-108705GB-I00 info:eu-repo/grantAgreement/ES/MICINN/PID2019-108753GB-C22 info:eu-repo/semantics/openAccess by-nc-nd https://creativecommons.org/licenses/by-nc-nd/4.0/deed.es 1.7 2024 PALEONTOLOGY 19 / 57 = 0.333 2024 Q2 T2 GEOLOGY 17 / 62 = 0.274 2024 Q2 T1 0.741 2024 Paleontology 2024 Q1 4.0 2024 info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion Muñoz, Arsenio Tella, Alberto Liesa, Carlos L. Universidad de Zaragoza (orcid)0000-0002-9130-117X 2000 428 Universidad de Zaragoza Dpto. Ciencias de la Tierra Área Geodinámica Interna 154 (2024), 105736 [26 pp.] Cretac. res. Cretaceous Research 0195-6671 Magnetic surveying as a proxy for defining cyclicity in thick sedimentary fillings: application to the Cretaceous Cameros Basin (N Spain) 10.17632/vm8kbhc7s6.1 16536946 http://zaguan.unizar.es/record/132445/files/texto_completo.pdf Versión publicada 2720787 http://zaguan.unizar.es/record/132445/files/texto_completo.jpg?subformat=icon icon Versión publicada oai:zaguan.unizar.es:132445 articulos driver 2026-02-17-20:23:09 ARTICLE