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| Gadel, F; Charriere, B; Serve, L; Comellas, L. |
| The analysis of humic compounds by elemental analysis, PY-GC-MS and HPLC techniques permitted determination of the origin of organic inputs, essentially terrestrial, and the effects of environmental conditions in the deposits along a north-south transect through the Rhone delta, from the river mouth to the open sea. In the prodelta the sedimentation of fine particles enriches the sediments in organic matter. The humic compound contents were relatively low in sediments, perhaps due to a rapid burying of organic matter which leads to anoxic conditions. In sediments fulvic acids are more abundant than humic acids. Elemental analysis indicated that fulvic acids were enriched in hydrogen and nitrogen as compared to humic acids. Furthermore, H/C and N/C ratios... |
| Tipo: Text |
Palavras-chave: HUMIC COMPOUNDS; MOLECULAR WEIGHT CLASSES; PY-GC-MS; HPLC; RHONE DELTA. |
| Ano: 1992 |
URL: http://archimer.ifremer.fr/doc/00101/21187/18804.pdf |
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| Giresse, P; Buscail, R; Charriere, B. |
| The upper similar to50 cm sediments in the deep-sea Aegean Sea were generally deposited through hemipelagic rain as indicated by paucity of terrigenous sand-sized particles, abundance of clay-sized materials and lack of turbiditic beds. However, quartz sand-sized grains, black debris, higher C org content and ON ratio attest to a significant river-borne supply in the North Aegean Trough. Recurrent gravity-induced transfers from the shelf break are evidenced through various markers of coastal deposition dating back the last low-stand (Characea oogons, Elphidium crispum, Ammonia beccarii, glauconitic grains, evolved organic matter). Especially, this deposition induced significant rise of the C/N ratio of successive layers. The top of ash layers of the Minoan... |
| Tipo: Text |
Palavras-chave: Halocène tardif; Dépôt; Mer Egée; Late Holocene; Deposit; Aegean Sea. |
| Ano: 2003 |
URL: http://archimer.ifremer.fr/doc/00321/43256/42987.pdf |
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