Consulta: subjectFacets:"High resolution seismic"
Registros recuperados: 4
Data/hora: 27/07/2024 02:46:58

Analyse des processus sedimentaires recents dans l'eventail profond du Danube (mer Noire)
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Popescu, Irina.
This study is focusing on the architecture and recent sedimentary evolution of the Danube channel, the youngest channel-levee system in the Danube deep-sea fan. The study was conducted as part of the BlaSON French-Romanian Project, and combined high-resolution seismic-reflection profiles and chirp profiles with multibeam bathymetry and piston cores. This data set was acquired in 1998 during a joint survey IFREMER-GeoEcoMar of the north-western Black Sea. Previous seismic and acoustic data were also used. The Danube deep-sea fan is a large passive-margin mud-rich fan. Like the other systems of this type (Amazon fan, Mississippi fan or Indus fan) the Danube fan consists of stacked channel-levee systems intercalated with mass-transport deposits. Seismic and...
Tipo: Text
Palavras-chave: High resolution seismic; Lowstand palaeogeography; Submarine canyons; Deep sea fans; Black Sea; Sismique haute résolution; Paléogéographie; Canyon sous marin; Eventail profond; Mer Noire.
Ano: 2002
URL: http://archimer.ifremer.fr/doc/2002/these-1206.pdf

Internal architecture of an incised valley-fill on a wave- and tide-dominated coast (the Leyre incised valley, Bay of Biscay, France).
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Fenies, Hugues; Lericolais, Gilles.
internal architecture of an incised valley-fill on a wave- and tide-dominated coast (the Leyre incised valley, Bay of Biscay, France). The Leyre incised valley shows a specific strata architecture related to its wave- and tide-dominated depositional environment. The low-stand systems tract has been totally eroded by the tidal ravinement surface and the valley is entirely filled by the transgressive systems tract. The Leyre and the Gironde incised valleys have been formed within the same depositional environment and the same stratigraphic framework. Consequently, the description of the internal architecture of the Leyre incised valley enables to complete the stratigraphic model of the wave- and tide-dominated incised valleys set up by Allen et Posamentier...
Tipo: Text
Palavras-chave: France; Bay of Biscay continental shelf; Arcachon Basin lagoon; Leyre estuary; High resolution seismic; Sequence stratigraphy; Incised valley; France; Plateau continental aquitain; Lagune du bassin d'Arcachon; Estuaire de la Leyre; Sismique haute résolution; Stratigraphie séquentielle; Vallée incisée.
Ano: 2005
URL: http://archimer.ifremer.fr/doc/2005/publication-793.pdf

Late Quaternary channel avulsions on the Danube deep-sea fan, Black Sea
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Popescu, Irina; Lericolais, Gilles; Panin, N; Wong, H; Droz, Laurence.
Analysis of new high-resolution seismic-reflection profiles, chirp profiles and previously published sidescan data, together with piston cores on the Danube Fan provide new insight into the recent sedimentation processes in the deep northwestern Black Sea.The latest channel-levee system on the Danube Fan developed probably during the Neoeuxinian lowstand (oxygene isotope stage 2) in a semi-freshwater basin with a water level about 100 m lower than today. Sediment supplied by the Danube was transported to the deep basin through the Viteaz Canyon, which was directly connected to the leveed channel of this system on the middle slope. Channel avulsion was common in the middle fan, as indicated by four main phases of bifurcation. Each phase developed after the...
Tipo: Text
Palavras-chave: High resolution seismic; Late Quaternary; Avulsion; Deep sea fan; Black Sea.
Ano: 2001
URL: http://archimer.ifremer.fr/doc/2001/publication-474.pdf

Morphological and Stratigraphic Investigation of a Holocene Subaqueous Shelf Fan, North of the Istanbul Strait in the Black Sea
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Okay, Seda; Jupinet, Benoit; Lericolais, Gilles; Cifci, Gunay; Morigi, Catherina.
In 2002, the Bosphorus outlet was mapped using an EM 300 multibeam echo-sounder together with a Chirp sonar system. This survey, carried out on board the Ifremer RV 'Le Suroit' in the frame of the BlaSON project, completes the data previously acquired directly at the mouth of the Bosphorus by Di Iorio et al. (1999) in the frame of a NATO SACLANT Undersea Research project using jointly the NATO RV Alliance, and the Turkish Navy Survey ship 'Cubuklu'. This acoustic imaging has identified a canyon system at the slope and a shallow marine fan, which contains shelf incisions extending the Istanbul Strait incision. Multibeam bathymetry, ultra-high resolution seismic profiling and coring correlations on this subaqueous fan area allowed reconstruction of...
Tipo: Text
Palavras-chave: Multibeam; High resolution seismic; Sea level change; High energy Mediterranean water input; Subaqueous fan.
Ano: 2011
URL: http://archimer.ifremer.fr/doc/00036/14676/13677.pdf