2026-05-08T09:43:56Zhttps://riubu.ubu.es/oai/request

oai:riubu.ubu.es:10259/115572026-05-01T00:05:52Zcom_10259.4_2560com_10259_5086com_10259_2604col_10259.4_2561

Vernet Tarrago, Eva 851 600 Calvo Rathert, Manuel 93 600 0000-0001-9977-0192 Carrancho Alonso, Ángel 104 600 0000-0001-7119-6424 Yamamoto, Yuhji 8277e6bf-1604-46d2-9d2d-3dc8db3f3117 600 Rodríguez Méndez, Lidia 6753f721-1695-4d8d-ac20-998d6cecbf8f 600 Parés Casanova, Josep M. 1089106b-72be-42e8-af40-0c7764076ff0 600 Soler, Vicente 04493ac5-c101-4381-aeb9-7d1a8a52150f 600 Vernet, Eva 5c22b2c6-d636-485b-a8d9-bce19fd82f1e 500 Calvo‐Rathert, Manuel 4d326f3c-1e07-4427-83d6-cf654d8ed91e 500 Carrancho, Ángel 6e3f8d06-9e7c-4e22-978d-3b408bbed6ac 500 Rodríguez‐Méndez, Lidia 2a221e30-70a5-46d4-91af-dc1b04feed11 500 Parés, Josep M. 314e3ec4-ddc2-4a8c-b4d5-7a18984ab941 500 2026-04-30T07:17:17Z 2026-04-30T07:17:17Z 2026-02 2169-9313 https://hdl.handle.net/10259/11557 10.1029/2025JB032659 2169-9356 We present new vector paleomagnetic data from 13 radiometrically dated lava-flows in southern La Palma (Canary Islands) spanning from 1 to 56 ka, which covers most of the Late Pleistocene to prehistoric Holocene volcanic record in the island. Using a paleointensity multimethod approach including Thellier-type and Shaw-type techniques, and combining detailed rock magnetic and mineralogical analyses, we assess the reliability and possible biases in paleointensity estimations in volcanic rocks affected by low-temperature oxidation and coarse ferromagnetic grains. Results indicate a strong viscous component linked to maghemitization, which compromises paleointensity reliability and accuracy. Low temperature demagnetization pretreatments significantly mitigated the viscosity contribution, improving success rates by highlighting the original thermoremanent magnetization (TRM) and revealing possible overestimations in standard Thellier-type treated samples affected by maghemitization. The full vector results, compared with several paleosecular variation curves, exhibited both low and high field intensity periods, including a relative paleointensity minimum at ∼27 ka (VADM ∼26 ZAm2) and the record of the Levant intensity high (VADM ∼108 ZAm2). This study contributes with valuable constraints for improving geomagnetic models, especially for low-latitude regions, and underscores the importance of integrating magnetic mineralogy with paleointensity protocols to mitigate bias in geomagnetic reconstructions. This research has been supported by projects PID2019105796GB-I00, PID2024-159094NB482-I00 of the Agencia Estatal de Investigación and BU037P23 of Junta de Castilla y León and the European Regional Development Fund. Eva Vernet Tarragó acknowledges funding from PRE2020-094803 (Agencia Estatal de Investigación) contract. This work was also supported by the project PID2022-136948NB-100/AEI/https://doi.org/10.13039/50110 00110 33/FEDER, UE (Spanish Ministry of Science and Innovation), and JSPS KAKENHI Grants JP21H01171 and JP24K00720. application/pdf eng American Geophysical Union Wiley Journal of Geophysical Research: Solid Earth. 2026, V. 131, n. 2, e2025JB032659 https://doi.org/10.1029/2025JB032659 Attribution-NonCommercial-NoDerivatives 4.0 Internacional http://creativecommons.org/licenses/by-nc-nd/4.0/ info:eu-repo/semantics/openAccess Paleomagnetic data Geomagnetic field Lava flows Geocronología Campos magnéticos Geological time Magnetic fields Reconstructing Late Pleistocene to Prehistorical Holocene Geomagnetic Field Variations From La Palma Lava Flows (Canary Islands, Spain): Unraveling Viscous Components info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion Journal of Geophysical Research: Solid Earth 131 2 THUMBNAIL Vernet-JGR_2026.pdf.jpg Vernet-JGR_2026.pdf.jpg IM Thumbnail image/jpeg 5305 https://riubu.ubu.es/bitstream/10259/11557/4/Vernet-JGR_2026.pdf.jpg ee40509ed60c00974c419cff56de15ee MD5 4 LICENSE license.txt license.txt text/plain; charset=utf-8 999 https://riubu.ubu.es/bitstream/10259/11557/3/license.txt b295bcbce42e2caabeb0c623d3860c06 MD5 3 CC-LICENSE license_rdf license_rdf application/rdf+xml; charset=utf-8 805 https://riubu.ubu.es/bitstream/10259/11557/2/license_rdf 4460e5956bc1d1639be9ae6146a50347 MD5 2 ORIGINAL Vernet-JGR_2026.pdf Vernet-JGR_2026.pdf application/pdf 4302241 https://riubu.ubu.es/bitstream/10259/11557/1/Vernet-JGR_2026.pdf b499ef6e57d20c388ead1b3fdf8cf057 MD5 1 10259/11557 oai:riubu.ubu.es:10259/11557 2026-05-01 02:05:52.134 Repositorio Institucional de la Universidad de Burgos bubrep@ubu.es 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