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• W1896681421 abstract "[1] Application of the 230 Th normalization method to estimate sediment burial fluxes in six cores from the eastern equatorial Pacific (EEP) reveals that bulk sediment and organic carbon fluxes display a coherent regional pattern during the Holocene that is consistent with modern oceanographic conditions, in contrast with estimates of bulk mass accumulation rates (MARs) derived from core chronologies. Two nearby sites (less than 10 km apart), which have different MARs, show nearly identical 230 Th-normalized bulk fluxes. Focusing factors derived from the 230 Th data at the foot of the Carnegie Ridge in the Panama Basin are >2 in the Holocene, implying that lateral sediment addition is significant in this part of the basin. New geochemical data and existing literature provide evidence for a hydrothermal source of sediment in the southern part of the Panama Basin and for downslope transport from the top of the Carnegie Ridge. The compilation of core records suggests that sediment focusing is spatially and temporally variable in the EEP. During oxygen isotope stage 2 (OIS 2, from 13–27 ka BP), focusing appears even higher compared to the Holocene at most sites, similar to earlier findings in the eastern and central equatorial Pacific. The magnitude of the glacial increase in focusing factors, however, is strongly dependent on the accuracy of age models. We offer two possible explanations for the increase in glacial focusing compared to the Holocene. The first one is that the apparent increase in lateral sediment redistribution is partly or even largely an artifact of insufficient age control in the EEP, while the second explanation, which assumes that the observed increase is real, involves enhanced deep sea tidal current flow during periods of low sea level stand." @default.
• W1896681421 created "2016-06-24" @default.
• W1896681421 creator A5021202980 @default.
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• W1896681421 creator A5069831736 @default.
• W1896681421 creator A5071535930 @default.
• W1896681421 date "2007-05-16" @default.
• W1896681421 modified "2023-10-14" @default.
• W1896681421 title "Thorium-230 normalized particle flux and sediment focusing in the Panama Basin region during the last 30,000 years" @default.
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• W1896681421 doi "https://doi.org/10.1029/2006pa001357" @default.
• W1896681421 hasPublicationYear "2007" @default.
• W1896681421 type Work @default.

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