Consulta: creatorFacets:"Charriere, B"
Registros recuperados: 3
Data/hora: 06/06/2024 03:25:24

Late Holocene multisource material input into the Aegean Sea: depositional and post-depositional processes
Provedor de dados: 5
Autores: 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

Caractérisation chimique des composés humiques et de leurs diverses classes de poids moléculaires dans les dépôts du delta du Rhône
Provedor de dados: 5
Autores: 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

Biotracers and geotracers of depositional events in NW Mediterranean margin over the past two centuries
Provedor de dados: 5
Autores: Giresse, P; Buscail, R; Charriere, B; Abassi, A; Masque, P; Sanchez-cabeza, Ja.
A detailed sedimentological and geochemical investigation was performed on slope sediments collected from the Gulf of Lions and Catalonian margins and from the northern Balearic margin. The study was based on cores, about 50 cm long. Various physiographic sites (canyons, open slopes) were selected according to the available sediment accumulation rates obtained with the Pb-210 geochronological method. At a short time scale, various parts of the slope were characterized by muddy hemipelagic sediment. Sedimentological data suggested that deposition was continuous. Total organic carbon and its hydrolysable fraction decreased downcore. Significant increase of C/N ratio downcore resulted from an early diagenetic process in response to the burial effect. However...
Tipo: Text
Palavras-chave: Méditerranée nord-occidentale; Vitesse de sédimentation; Processus gravitaires; Carbone organique; 210Pb; North-western Mediterranean; Sedimentation rate; Gravity-induced process; Organic carbon; Pb-210.
Ano: 2001
URL: http://archimer.ifremer.fr/doc/00322/43335/42892.pdf