2026-04-17T10:24:46Zhttps://riubu.ubu.es/oai/request

oai:riubu.ubu.es:10259/96632024-11-07T01:05:26Zcom_10259.4_2560com_10259_5086com_10259_2604col_10259.4_2561

Bógalo Román, Mª Felicidad Ramírez‐Herrera, Maria-Teresa Goguitchaichvili, Avto Rey García, Daniel Mohamed Falcón, Kais Jacob Calvo Rathert, Manuel 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. M. F. Bógalo and M. Calvo-Rathert acknowledge financial support by projects BU0066U16 of the Junta de Castilla y León (Spain) and CGL2016–77560 from Ministerio de Economía y Competitividad (MINECO) both with European Regional Development Fund (ERDF) funding. M. T. Ramírez-Herrera acknowledges financial support by grants PAPPIT-UNAM-IN123609 and SEP-CONACYT-129456, and DGAPA-PASPA-2015. A. Goguitchaichvili acknowledges the partial financial support provided by DGAPA-PAPIIT IN101717 and CONACYT 252149. This work was also partially supported by Spanish projects CGL2015–66681-R and CGL2014–54117-REDT from MINECO and GRC2014/023 from Xunta de Galicia. K. J. Mohamed was funded by ED481C 2014/2 grant of the Xunta de Galicia. application/pdf eng American Geophysical Union (AGU) Geochemistry, Geophysics, Geosystems. 2017, V. 18, n. 6, p. 2370-2387 https://doi.org/10.1002/2016GC006752 info:eu-repo/grantAgreement/AEI/Plan Estatal de Investigación Científica y Técnica y de Innovación 2013-2016/CGL2016-77560-C2-1-P/ES/La remagnetización cretacica del alto Atlas Central como herramienta de reconstrucción geométrica de la estructura Pre-cenozoica/ info:eu-repo/grantAgreement/Junta de Castilla y León//BU066U16//Estudio arqueomagnéticos y de propiedades magnéticas en registros de fuegos antrópicos prehistóricos. Aplicaciones a la arqueología/ info:eu-repo/grantAgreement/MINECO//CGL2015-66681-R/ES/FORZAMIENTOS Y PROCEDENCIA DE LOS APORTES SEDIMENTARIOS EN LAS RIAS DE VIGO Y MUROS COMO BASE DE UN MODELO DE TRANSPORTE: LA PLUMA DEL MIÑO, EL UPWELLING Y LAS FUENTES LOCALES/ info:eu-repo/grantAgreement/MINECO//CGL2014–54117-REDT/ES/MAGIBER: PALEOMAGNETISMO EN IBERIA Y CANARIAS/ info:eu-repo/grantAgreement/Xunta de Galicia//GRC2014%2F023//Xeoloxía Mariña e Ambiental (XM2) info:eu-repo/grantAgreement/Xunta de Galicia//ED481C 2014%2F2/ Magnetismo terrestre Geología Geomagnetism Geology Magnetic signature of the 22 June 1932 tsunami deposits (Jalisco, Mexican Pacific coast) info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion info:eu-repo/semantics/openAccess Geochemistry, Geophysics, Geosystems 18 6 2370 2387