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Registros recuperados: 3
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Benefits of swath mapping for the identification of marine habitats in the New Caledonia Economic Zone ArchiMer
Van De Beuque, Sabrina; Auzende, Jean-marie; Lafoy, Yves; Grandperrin, René.
The ZoNeCo programme is devoted to the evaluation of the marine resources of the Economic Zone of New Caledonia. The results are essentially dependent on the quality of the seafloor mapping. From 1993 to 1996, four geological and geophysical surveys using the EM12 DUAL multibeam echosounder provided swath-mapping and acoustic imagery data of the seafloor of selected sites on the northern and southern parts of the Norfolk ridge, the Loyalty basin, around the Loyalty islands and in the westernmost part of the Economic Zone of New Caledonia. The accuracy of these documents shows the morphology of the seafloor in detail and allows rocky substratum to be differentiated from muddy bottom. It allows favorable emplacements of future exploratory fishing surveys to...
Tipo: Text Palavras-chave: Ressources marines; Habitats marins; Cartographie multifaisceaux; Nouvelle Calédonie; Sud Ouest Pacifique; Marine resources; Marine habitats; Swath mapping; New Caledonia; SW Pacific.
Ano: 1999 URL: http://archimer.ifremer.fr/doc/1999/publication-833.pdf
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Marine resources of the economic zone of New Caledonia ArchiMer
Auzende, Jean-marie; Grandperrin, René; Bouniot, Emmanuel; Henin, Christian; Lafoy, Yves; De Forges, Bertrand; Van De Beuque, Sabrina; Virly, Sabrina.
The ZoNeCo programme, devoted to the evaluation of living and non-living marine resources within the Economic Zone of New Caledonia, illustrates clearly the Marine Benthic Habitats concept. It exhibits the study of the physical environment and disciplines such as geology and physical oceanography. The results acquired in these fields are used as bases to study the presence and the distribution of living species within a given habitat. The knowledge of all the parameters relative to each discipline is a useful guide for the evaluation and the sustainable management of living and nonliving resources.
Tipo: Text Palavras-chave: Ressources marines; Habitat; Nouvelle Calédonie; Ressources Sud Ouest Pacifique; Marine resources; Habitat; New Caledonia; Southwest Pacific.
Ano: 1999 URL: http://archimer.ifremer.fr/doc/1999/publication-832.pdf
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Thinned crust in southwest Pacific may harbor gas hydrate ArchiMer
Auzende, Jean-marie; Dickens, Gerald R.; Van De Beuque, Sabrina; Exon, Neville F.; François, Caroline; Lafoy, Yves; Voutay, Olivier.
The Lord Howe Rise (LHR) is a large, complex, and poorly studied fragment of thinned continental crust submerged 750–3000 m beneath the oligotrophic waters of the central Tasman Sea (Figure 1). Deep seismic profiles taken during recent cruises in the region have revealed an intriguing phenomenon: the eastern slope of the LHR has a prominent and extensive bottom simulating reflector (BSR) that cross‐cuts lithology at 0.65–0.75 s two‐way travel time (twt) [Exon et al., 1998; Lafoy et al., 1998]. Given best estimates for sonic velocity (1600 m/s) and thermal gradients (0.9+0.04°C/m) in sediment on the LHR, predicted temperatures and pressures at the depth of the BSR lie on the CH4‐CH4 hydrate‐seawater equilibrium curve. Thus, the BSR on the LHR most likely...
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Ano: 2000 URL: http://archimer.ifremer.fr/doc/00451/56251/57822.pdf
Registros recuperados: 3
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