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Pàgina inicial > Articles > Articles publicats > Identifying instrumental and historical earthquake records in the SW Iberian margin using ²¹⁰Pb turbidite chronology |
Data: | 2006 |
Resum: | Textural, mineralogical and geochemical analyses of near-surface sediments from six different stations offshore SW Iberian Peninsula revealed the presence of thin detrital intervals corresponding to very fine-grained turbidites. Precise dating of the two most recent sedimentary layers based on ²¹⁰ Pb and ¹³⁷ Cs geochronology provides ages of 1971 ± 3 AD and 1908 ± 8 AD. These ages correspond to high-magnitude historical and instrumental earthquakes that occurred in the region: the 1969 Horseshoe Earthquake (Mw 8. 0) and the 1909 Benavente Earthquake (Mw 6. 0). Such a good correlation between turbidites and high-magnitude (Mw > 6) historical and instrumental seismic events suggests that the record of mass transport deposits can also be used as a paleoseismic indicator in low-convergence margins. |
Ajuts: | Ministerio de Ciencia y Tecnología REN2000-2150-E Ministerio de Ciencia y Tecnología REN2002-11234E-MAR Ministerio de Ciencia y Tecnología REN2003-05996-MAR |
Nota: | Altres ajuts: ESF-EUROMARGINS SWIM project (01-LEG-EMA09F) |
Drets: | Tots els drets reservats. |
Llengua: | Anglès |
Document: | Article ; recerca ; Versió publicada |
Matèria: | Earthquakes ; Turbidite |
Publicat a: | Geophysical research letters, Vol. 33 Issue 24 (Dec. 2006) , ISSN 0094-8276 |
6 p, 256.7 KB |