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| Govin, A.; Chiessi, C. M.; Zabel, M.; Sawakuchi, A. O.; Heslop, D.; Hoerner, T.; Zhang, Y.; Mulitza, S.. |
| We investigate changes in the delivery and oceanic transport of Amazon sediments related to terrestrial climate variations over the last 250 ka. We present high-resolution geochemical records from four marine sediment cores located between 5 and 12 degrees N along the northern South American margin. The Amazon River is the sole source of terrigenous material for sites at 5 and 9 degrees N, while the core at 12 degrees N receives a mixture of Amazon and Orinoco detrital particles. Using an endmember unmixing model, we estimated the relative proportions of Amazon Andean material ("%-Andes", at 5 and 9 degrees N) and of Amazon material ("%-Amazon", at 12 degrees N) within the terrigenous fraction. The %-Andes and %-Amazon records exhibit significant... |
| Tipo: Text |
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| Ano: 2014 |
URL: https://archimer.ifremer.fr/doc/00291/40230/38675.pdf |
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