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Detailed Reference Information |
Garcia-Orellana, J., Gràcia, E., Vizcaino, A., Masqué, P., Olid, C., Martínez-Ruiz, F., Piñero, E., Sanchez-Cabeza, J. and Dañobeitia, J. (2006). Identifying instrumental and historical earthquake records in the SW Iberian margin using 210Pb turbidite chronology. Geophysical Research Letters 33: doi: 10.1029/2006GL028417. issn: 0094-8276. |
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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 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. |
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Abstract |
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Keywords
Exploration Geophysics, Radioactivity methods, Geochronology, Radioisotope geochronology, Marine Geology and Geophysics, Marine sediments, processes and transport, Seismology, Paleoseismology |
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Publisher
American Geophysical Union 2000 Florida Avenue N.W. Washington, D.C. 20009-1277 USA 1-202-462-6900 1-202-328-0566 service@agu.org |
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