Títol:
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Identifying instrumental and historical earthquake records in the SW Iberian margin using ²¹⁰Pb turbidite chronology
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Autor/a:
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Garcia-Orellana, Jordi; Gràcia, Eulàlia; Vizcaino, Alexis; Masqué Barri, Pere; Olid García, Carolina; Martínez-Ruiz, Francisca; Piñero, Elena; Sánchez Cabeza, Joan Albert; Dañobeitia, Juanjo
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Abstract:
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Altres ajuts: ESF-EUROMARGINS SWIM project (01-LEG-EMA09F) |
Abstract:
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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 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. |
Matèries:
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-Earthquakes -Turbidite |
Drets:
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open access
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Tipus de document:
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Article |
Publicat per:
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Uri:
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https://ddd.uab.cat/record/158282
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