2026-04-17T09:35:13Zhttps://riubu.ubu.es/oai/requestoai:riubu.ubu.es:10259/96632024-11-07T01:05:26Zcom_10259.4_2560com_10259_5086com_10259_2604col_10259.4_2561
Repositorio Institucional de la Universidad de Burgos
author
Bógalo Román, Mª Felicidad
author
Ramírez‐Herrera, Maria-Teresa
author
Goguitchaichvili, Avto
author
Rey García, Daniel
author
Mohamed Falcón, Kais Jacob
author
Calvo Rathert, Manuel
author
Corona, Néstor
2024-11-06T10:37:14Z
2024-11-06T10:37:14Z
2017-06
1525-2027
http://hdl.handle.net/10259/9663
10.1002/2016GC006752
1525-2027
Recent studies have demonstrated that rock-magnetic analysis may provide additional information to distinguish and characterize extreme marine inundation events such as tsunamis. Rock-magnetic proxies reinforce and improve the environmental evidences supplied by other methods, adding some decisive clues for the interpretation of the origin and genesis of the sedimentary deposits. Here we report rock-magnetic, XRD, and SEM microscopy results obtained in the Palo Verde estuary (Colima Pacific coast, Mexico) in order to enhance the tools for identification and reconstruction of two tsunami-induced deposits. The sedimentary sequence includes two sand units, a tsunami deposit (PV1) associated with the 22 June 1932 tsunami and a deeper sandy layer (PV2) related to a possible paleotsunami that occurred around 1300 C.E. Both sandy units are topped by finer grained units. Magnetic properties exhibit a significant correlation with the stratigraphy. High susceptibility (χ) and high saturation isothermal remanence (SIRM) values typical of high concentrations of (titano)magnetite are a distinctive feature of the most recent sandy tsunamigenic unit PV1 and the overlaying soil. The lower sandy tsunamigenic unit PV2 shows significantly lower χ and SIRM values, indicating lower concentration of (titano)magnetite in this unit and the overlaying clayey-silt unit. The latter also shows a higher coercivity component associated with (titano)hematite. Magnetic grain-size differences are also observed between PV1 and PV2 suggesting differences in hydraulic conditions at the time of deposition. The bulk mineralogical composition and sediment texture of these units also support the hypothesis of different provenances for each tsunamigenic unit as inferred from magnetic properties.
eng
Magnetic signature of the 22 June 1932 tsunami deposits (Jalisco, Mexican Pacific coast)
info:eu-repo/semantics/article
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URL
https://riubu.ubu.es/bitstream/10259/9663/1/Bogalo-ggg_2017.pdf
File
MD5
582da3ebb7ed758557731ec2ac97d192
2086169
application/pdf
Bogalo-ggg_2017.pdf