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| Meyer, Inka; Davies, Gareth R.; Stuut, Jan-berend W.. |
| Five sediment cores from offshore NW Africa were analyzed for strontium and neodymium isotope ratios to reconstruct temporal variations in continental weathering regimes. Sediments were taken from three time slices with well-known and distinctive environmental conditions: present-day (dry and warm), similar to 6 ka (wet and warm), and similar to 12 ka (dry and cold). Terrigenous sediment samples were split into two size fractions to distinguish between the two dominant transport mechanisms offshore NW Africa: fluvial (0-10 mu m) and aeolian (10-40 mu m). Sr isotope data record evidence of marked grain size control with higher isotopic ratios in the fine fraction. In contrast, epsilon(Nd) values are largely unaffected by grain size. Minor variability in Nd... |
| Tipo: Text |
Palavras-chave: Holocene; Sr-Nd isotopes; Provenance; Grain size effect. |
| Ano: 2011 |
URL: https://archimer.ifremer.fr/doc/00227/33870/32263.pdf |
