Publication details
ORIGEN, HIDRODINÁMICA Y VARIACIÓN LATERAL EN SEDIMENTOS DE TSUNAMI POR AMS, COSTA MEXICANA DEL PACÍFICO
| Title in English | Origin, hydrodynamics and lateral variation of AMS in tsunami sediments, Mexican Pacific Coast |
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| Authors | |
| Year of publication | 2016 |
| Type | Article in Periodical |
| Magazine / Source | Latinmag Letters |
| MU Faculty or unit | |
| Citation | |
| Web | http://www.geofisica.unam.mx/LatinmagLetters/LL16-01-SP/D/D06.pdf |
| Field | Geology and mineralogy |
| Keywords | Anisotropy of magnetic susceptibility; Rock-magnetic properties; Tsunami; Mexican Pacific coast |
| Description | Subduction zone earthquakes can generate abrupt vertical movement of the seafloor or submarine landslide. Both can produce a tsunami wave that can hit coastal areas. Such waves transport material which is usually deposited on flat plains and in topographic depressions on the coast. From this point of view, lagoons are ideal environments where tsunami deposits can be preserved. The studied sites were situated in lagoons on the active Mexican continental margin, where both storm and tsunami inundations can occur. The potential of magnetic proxies in marine inundation deposits studies is still under consideration, and there are some methodological difficulties. Our most recent results showed that: 1) magnetic studies may be useful to determine what material was the main source of magnetic minerals in sediments; 2) AMS can help to distinguish different hydrodynamic environments related to different layers; 3) primary sedimentary fabric in fine-grained lagoon sediments such clays may have developed lateral imbrication; 4) the lateral variability of AMS parameters can be significant and a test of horizontal variability in sedimentary beds should be performed before final interpretations. |