Registro magnético de depósitos de tsunami en la costa de ColimaMéxico

  1. M.F. Bógalo 1
  2. M.T. Ramírez-Herrera 2
  3. A. Gogichaisvili 2
  4. J. Černý 3
  5. Nestor Corona 4
  6. D. Rey 5
  7. K. Mohamed 5
  1. 1 Universidad de Burgos
    info

    Universidad de Burgos

    Burgos, España

    ROR https://ror.org/049da5t36

  2. 2 Universidad Nacional Autónoma de México
    info

    Universidad Nacional Autónoma de México

    Ciudad de México, México

    ROR https://ror.org/01tmp8f25

  3. 3 Masaryk University, Brno, Czech Republic
  4. 4 Centro de Estudios en Geografía Humana
  5. 5 Universidade de Vigo
    info

    Universidade de Vigo

    Vigo, España

    ROR https://ror.org/05rdf8595

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Journal:
Geotemas (Madrid)

ISSN: 1576-5172

Year of publication: 2016

Issue Title: IX CONGRESO GEOLÓGICO DE ESPAÑA

Issue: 16

Pages: 797-800

Type: Article

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More publications in: Geotemas (Madrid)

Abstract

The Pacific coast of Mexico has repeatedly been exposed to the destructive action of tsunamis. Different proxies, including magnetic properties, are required in order to identify this kind of events. In this work, we provide magnetic results of the sedimentary sequence of Palo Verde, sited on the Colima coast of Mexico, which overlies the subducting Rivera Plate under the North American plate. This sequence consists of four distinct units, two of which are anomalous sand beds (PV1 and PV2) probably of tsunamigenic origin. PV1 has been linked with the 22 June 1932 tsunami while PV2 is related to a probable paleotsunami that occurred around 1300 CE. The magnetic properties exhibit a sharp variation at the base of the PV1 unit. In this upper unit, the susceptibility values () and isothermal remanent magnetization (SIRM) are anomalously high and the magnetic response is mainly due to the contribution of (titano)magnetite with larger grain size than in PV2 unit. In addition, (titano)hematite is also detected throughout the whole profile, but mainly in the intermediate unit between the tsunamigenic units. Additional environmagnetic studies in nearby areas may be helpful to determine the provenance of the magnetic material.

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