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| Latouche, C; Jouanneau, J M; Lapaquellerie, Y; Maillet, N; Weber, O. |
| The southern Biscay shelf is a typical example of a continental margin submitted to a macrotidal regime and the heavy sedimentary fluxes of continental provenance. The aim of this study was to determine the manner in which clay sedimentation is organized on the margin and to evaluate the impact of both river-borne inputs and marine hydrodynamic activity. It was established that the distribution of clay minerals (in the order of frequence: micas, chlorites, illites and smectites) is upset by the interconnection of several sedimentary processes: discontinuous river-borne discharges (richer in smectites); the mixture of newly-arrived material with fine fractions (rich in micas and chlorites) resulting from the reworking of remnant material that represents the... |
| Tipo: Text |
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| Ano: 1991 |
URL: http://archimer.ifremer.fr/doc/00268/37889/35970.pdf |
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| Carruesco, C; Jouanneau, J M; Lapaquellerie, Y. |
| The water repartition in the Arcachon Basin is as follows: 1) Exterior neritic water, purely marine (the inlet area); 2) Interior neritic water (bottom of the basin); 3) Middle neritic water found between the two above mentioned types of water (central part of the basin). Analyses carried out since 1972 show an increase of average trace metal contents (Zn = 100%, Cu = 400%, Pb = 400%) and of organic particulate carbon. The Lagoon center, poor in metal content, is considered as a geochemical baseline of the basin. Since 1977, this baseline has been showing an increase of metallic elements. These concentrations, however, may be easily compared to the average metal content, noted for the same type of sediments. Inversely, the decrease of metal contents in the... |
| Tipo: Text |
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| Ano: 1982 |
URL: http://archimer.ifremer.fr/doc/00246/35709/34218.pdf |
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