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Cycles sédimentaires dans le système turbiditique du Congo : nature et origine ArchiMer
Picot, Marie.
Turbidite systems are huge submarine sedimentary fans located off rivers, at the foot of the continental slope. They constitute the most distal terrigeneous deposits of a fluvial system. Their internal structure, defined as a stacking of channel-levee systems, show architectural changes through time. Forcing factors of these architectural changesare still poorly understood, and the respective role of internal (related to the own functioning of the system) or external forcing factors (climate, seal-level variations, tectonics) remains debated. To better understand the role of these controlling factors, a detailed study of the Congo system architecture was carried out. This study was conducted as part of the Reprezaï research project (Ifremer/IUEM, since...
Tipo: Text Palavras-chave: Système turbiditique; Congo; Quaternaire terminal; Cycles sédimentaires; Progradation et rétrogradation; Avulsion; Lobes; Paléoclimat; Sismique; Carottes sédimentaires; Turbidite system; Congo; Quaternary; Sedimentary cycles; Progradation; Retrogradation; Avulsion; Lobes; Paleoclimate; Geophysical data; Sedimentary cores Thèse.
Ano: 2015 URL: http://archimer.ifremer.fr/doc/00312/42275/41599.pdf
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Évolution des métaux lourds dans la sédimentation récente de la baie de Fort-de-France (Martinique) ArchiMer
Pujos, Michel; Pons, Jean-claude; Parra, Maria.
Mud progradation of eustatic and to a lesser extent of neotectonic origin began 2000 years ago in the bay of Fort-de-France (Martinique). The terrigenous muds originate from erosion of rocks and soils and cover essentially the inner part of the bay. Recent muds tend of the nineteenth century to the present) are characterized by a sharp enrichment in heavy metals. High concentrations of Ph, Zn and Cu result from a) the rapid development of sugar cane and distilleries about 1880, and b) industrial activities of Fort-de-France region (after the second world war).
Tipo: Text Palavras-chave: Envasement; Métaux lourds; Quaternaire terminal; Baie de Fort-de-France; Mud progradation; Heavy metals; Late Quaternary; Fort-de-France bay.
Ano: 2000 URL: http://archimer.ifremer.fr/doc/00323/43380/42828.pdf
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Enregistrements stratigraphiques des cycles climatiques et eustatiques du Quaternaire terminal - Modélisations de la marge continentale du Golfe du Lion. ArchiMer
Jouet, Gwenael.
Earth's climate oscillated during the Late Quaternary following the major glacial-interglacial cycles. These well-known variations influenced continental and marine sedimentary records worldwide. However, the associated changes of global sea-level and of environmental factors are not precisely documented, neither are their stratigraphic signatures. The extensive geophysical and sedimentological investigations carried out in the Gulf of Lions (Western Mediterranean) since the early 90's allow us to explore the expanded sedimentary records preserved on this continental margin during the Late Quaternary. The combination of high sediment supply (largely from Alpine glaciers) and significant subsidence favoured an almost continuous record, at the shelf edge, of...
Tipo: Text Palavras-chave: Late Quaternary; Lithology; Seismic; Gulf of Lions; Stratigraphic modelling; Glacio Eustatic cycles; Climate; Deltaic margin; Sequence Stratigraphy; Quaternaire terminal; Lithologie; Sismique; Golfe du Lion; Modélisations stratigraphiques; Cycles Glacio Eustatiques; Climat; Marge deltaïque; Stratigraphie Séquentielle.
Ano: 2007 URL: http://archimer.ifremer.fr/doc/2007/these-3692.pdf
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