Physics – Geophysics
Scientific paper
Dec 2006
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2006georl..3324601g&link_type=abstract
Geophysical Research Letters, Volume 33, Issue 24, CiteID L24601
Physics
Geophysics
3
Exploration Geophysics: Radioactivity Methods, Geochronology: Radioisotope Geochronology, Marine Geology And Geophysics: Marine Sediments: Processes And Transport, Seismology: Paleoseismology (8036)
Scientific paper
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.
Dañobeitia Juanjo
Garcia-Orellana Jordi
Gràcia Eulàlia
Martinez-Ruiz Francisca
Masqué Pere
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