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A 6600 year earthquake history in the region of the 2004 Sumatra-Andaman subduction zone earthquake

AutorPatton, Jason; Vizcaino, A.
Fecha de publicacióndic-2015
EditorGeological Society of America
CitaciónGeosphere 11(6): 2067-2129 (2015)
ResumenIn order to investigate the possibility of a long-term paleoseismic history from offshore sedimentary records in Sumatra, we collected 144 deep-sea sediment cores in the trench and in lower slope piggyback basins of the Sumatra accretionary prism. We used multibeam bathymetry and seismic reflection data to develop an understanding of catchment basins, turbidity current pathways, and depositional styles, as well as to precisely locate our gravity cores, piston cores, Kasten cores, and multicores. We use detailed physical property data, including computed tomographic X-ray, gamma density, magnetic susceptibility, grain-size analysis, faunal analysis, and smear slides, to evaluate the turbidite stratigraphy and sedimentology at each site. We use radiocarbon age control for piggyback basin sites above the carbonate compensation depth, and use 210Pb and 137Cs to evaluate the timing of the most recent sedimentary deposits. Using well-log correlation methods and radiometric age control, we test for potential correlations between isolated sites in piggyback basins and the trench. [...]
DescripciónPatton, Jason ... et. al.
Versión del editorhttps://doi.org/10.1130/GES01066.1
Identificadoresdoi: 10.1130/GES01066.1
e-issn: 1553-040X
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