Testing rock magnetic and AMS methods in tsunami and storm-induced deposits

• Autor(es): Font, Eric ; Duarte, Sílvia ; Veiga-Pires, C. ; Simões, Nuno ; Muñoz, Francisco Ruiz ; Abad, Manuel ; Pozo, Manuel ; Nave, Silvia ; Costas, Susana ; Rebelo, Luis
• Data: 2012
• Identificador Persistente: http://hdl.handle.net/10400.1/3305
• Origem: Sapientia - Universidade do Algarve
• Assunto(s): Rock magnetism; Storm deposit; AMS; Tsunami deposit
• Tipo de Documento: Outro
• Idioma: Inglês

Descrição

Storm- and tsunami-deposits are generated by similar depositional mechanisms making their discrimination hard to establish using classic sedimentologic methods. A promising approach is to use rock magnetism techniques to search for new physical benchmarks of tsunami deposits and to integrate them into a multi-disciplinary study. To test our method, we investigate the 1755 Lisbon tsunami deposit from the Boca do Rio estuary and other Tsunami-induced deposits from Algarve (Portugal) and Huelva (Spain), as well as storm-like deposits for comparison. Magnetic methods repose on bulk (magnetic susceptibility, SIRM, Hc) and directional (AMS, paleomagnetism) magnetic properties.