2026-04-17T11:43:28Zhttps://riubu.ubu.es/oai/request

oai:riubu.ubu.es:10259/75972023-04-20T09:26:42Zcom_10259.4_2560com_10259_5086com_10259_2604col_10259.4_2561

Parés Casanova, Josep M. Vernet Tarrago, Eva Calvo Rathert, Manuel Soler, Vicente Bógalo Román, Mª Felicidad Álvaro, Ana 2023-03-24T11:44:00Z 2023-03-24T11:44:00Z 2022-07 http://hdl.handle.net/10259/7597 10.3390/geosciences12070271 2076-3263 We present initial rock magnetic results for both lava flows and lapilli produced by the 2021 eruption of the Cumbre Vieja, La Palma (Canary Islands). Samples were taken during the eruption to minimize early alteration and weathering of the rocks and tephra. Standard procedures included progressive alternating field and thermal demagnetization, hysteresis curves, thermomagnetic experiments, progressive acquisition of isothermal remanent magnetization (IRM), and First-Order Reversal Curves (FORCs). Overall, our observations, including low to medium unblocking temperatures, isothermal remanent magnetization to 1 Tesla, and the abundance of wasp-waist hysteresis loops, strongly suggest the presence of Ti-rich titanomagnetites as the main remanence carriers in both lava flows and lapilli, in addition to some hematite as well. Whereas the former has been directly seen (SEM), hematite is elusive with nonmagnetic-based methods. Rock magnetic data, on a Day plot, also reveal that the magnetic grain size tends to be larger in the lava flows than in the lapilli. This research was funded by Agencia Estatal de Investigación, Spain, grant no. PID2019-105796GB-00/AEI/10.13039/501100011033. application/pdf eng MDPI Geosciences. 2022, V. 12, n. 7, 271 https://doi.org/10.3390/geosciences12070271 info:eu-repo/grantAgreement/AEI/Plan Estatal de Investigación Científica y Técnica y de Innovación 2017-2020/PID2019-105796 GB-I00/ES/LAS VARIACIONES DEL REGISTRO ARQUEOMAGNETICO PREHISTORICO EN LA PENINSULA IBERICA Y EL CAUCASO/ Atribución 4.0 Internacional http://creativecommons.org/licenses/by/4.0/ info:eu-repo/semantics/openAccess Rock magnetism Canary Islands Recent volcanic eruption Lapilli Basaltic lava flow Física Geología Physics Geology Rock Magnetism of Lapilli and Lava Flows from Cumbre Vieja Volcano, 2021 Eruption (La Palma, Canary Islands): Initial Reports info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion Geosciences 12 7