Informace o publikaci
Rock-magnetic propeties and anisotropy of magnetic susceptibility – supplementary proxies in tsunami deposits identification: the 22 june 1932 event, Pacific coast of Mexico
| Autoři | |
|---|---|
| Rok publikování | 2013 |
| Druh | Článek v odborném periodiku |
| Časopis / Zdroj | Latinmag Letters |
| Fakulta / Pracoviště MU | |
| Citace | |
| www | http://www.geofisica.unam.mx/LatinmagLetters/LL13-03-SP/B/OB01.pdf |
| Obor | Geologie a mineralogie |
| Klíčová slova | Tsunami deposits; Magnetic Susceptibility (MS) and Anisotropy of Magnetic Susceptibility (AMS); tropical environment; Pacific coast of Mexico |
| Popis | Tsunami deposits have been widely studied in temperate latitudes, but the intrinsic difficulties associated with working in tropical coastal environments, and the intensity of bioturbation in these habitats limits the opportunities for analyzing these deposits. To date, no single analytical technique will with certainty identify buried tsunami deposits. We applied a combination of magnetic properties, Magnetic Susceptibility (MS) and Anisotropy of Magnetic Susceptibility (AMS) proxies, to corroborate historical/etnographic, geomorphological, stratigraphic, sedimentological (grain size, organic matter content), microfossil (diatom, foraminifera and ostracods), geochemical, geochronological (210Pb and 14C dating) analyses and modeling in order to recognize deposits indicative of tsunami inundation. MS and AMS evidence aid in demonstrating that anomalous sand units with sharp basal contacts are the products of two tsunamis, one of them related to the Mw 6.9 June 22, 1932 event and another by a prehistorical event |