RT info:eu-repo/semantics/article
T1 Rock Magnetism of Lapilli and Lava Flows from Cumbre Vieja Volcano, 2021 Eruption (La Palma, Canary Islands): Initial Reports
A1 Parés Casanova, Josep M.
A1 Vernet Tarrago, Eva
A1 Calvo Rathert, Manuel
A1 Soler, Vicente
A1 Bógalo Román, Mª Felicidad
A1 Álvaro, Ana
K1 Rock magnetism
K1 Canary Islands
K1 Recent volcanic eruption
K1 Lapilli
K1 Basaltic lava flow
K1 Física
K1 Physics
K1 Geología
K1 Geology
AB We present initial rock magnetic results for both lava flows and lapilli produced by the 2021eruption of the Cumbre Vieja, La Palma (Canary Islands). Samples were taken during the eruption tominimize early alteration and weathering of the rocks and tephra. Standard procedures includedprogressive alternating field and thermal demagnetization, hysteresis curves, thermomagnetic experiments, progressive acquisition of isothermal remanent magnetization (IRM), and First-Order ReversalCurves (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 lavaflows 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, alsoreveal that the magnetic grain size tends to be larger in the lava flows than in the lapilli.
PB MDPI
YR 2022
FD 2022-07
LK http://hdl.handle.net/10259/7597
UL http://hdl.handle.net/10259/7597
LA eng
NO This research was funded by Agencia Estatal de Investigación, Spain, grant no. PID2019-105796GB-00/AEI/10.13039/501100011033.
DS Repositorio Institucional de la Universidad de Burgos
RD 23-nov-2024