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Title

Identifying instrumental and historical earthquake records in the SW Iberian margin using 210Pb turbidite chronology.

AuthorsGarcía-Orellana, Jordi; Gràcia, Eulàlia ; Vizcaino, A. ; Masqué, Pere; Olid, Carolina; Martínez-Ruiz, Francisca; Piñero, Elena ; Sanchez-Cabeza, Joan-Albert; Dañobeitia, Juan José
Issue Date16-Dec-2006
PublisherAmerican Geophysical Union
CitationGeophysical Research Letters 33: L24601 (2006)
AbstractTextural, 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 210Pb and 137Cs 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.
Publisher version (URL)http://dx.doi.org/10.1029/2006GL028417
URIhttp://hdl.handle.net/10261/18703
DOI10.1029/2006GL028417
ISSN8755-1209
Appears in Collections:(IACT) Artículos
(UTM) Artículos
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