SEDLAB

Type Oceanographic cruise
Ship Alis
Ship owner IRD
Dates 06/04/2018 - 04/05/2018
Chief scientist(s) ETIENNE Samuel , COLLOT Julien , LE ROY Pascal

PÔLE MER - SERVICE GÉOLOGIQUE

1 ter rue Unger

BP 465

98845 NOUMEA

+687 249 077

technopole@adecal.nc

http://www.technopole.nc/fr/pole-marin
DOI 10.17600/18000401
Objective

The SEDLAB cruise aims at investigating the Neogene drowned isolated platform(s) of the Lansdowne Bank and the northern tip of the Fairway Ridge (New Caledonia EEZ, South-West Pacific) onboard R/V Alis, thanks to multibeam data between 0-1000m water depth, seismic profiles (SPARKER) and sediment/rock samples trough dredging and gravity coring.

 

 

This extensive bank is thought to correspond to an ancient rimmed platform today partially drowned. The overall objective is to characterise the morphologies and sedimentary facies of the Lansdowne Bank and his margins, notably regarding the surrounding turbidite slope systems that feed three distinct deepwater basins: the New Caledonia, Lord Howe and Fairway basins. This morphological, faciological and architectural characterization should bring new insights on the platform to basin relationships, notably in terms of sedimentary transfers and processes. Moreover, significant results are anticipated on the timing and different control parameters on the onset, aggradation and drowning of carbonate platforms, as well as on Quaternary climate driven eustatic variations.

All these new data, on a remote environment, particularly rich in biodiversity, will perfectly integrate with the objectives of the newly created Natural Park of the Coral Sea.

Data managed by SISMER

Sampling operations

Bibliography

Publications

Etienne Samuel, Roy Pascal, Tournadour Elsa, Roest WalterORCID, Jorry StephanORCID, Collot Julien, Patriat MartinORCID, Largeau Maria A., Roger Jean, Clerc Camille, Dechnick Belinda, Sanborn Kelsey L., Lepareur Fanny, Horowitz Jeremy, Webster Jody M., Gaillot Arnaud (2021). Large-scale margin collapses along a partly drowned, isolated carbonate platform (Lansdowne Bank, SW Pacific Ocean). Marine Geology, 436, 106477 (21p.). Publisher's official version : https://doi.org/10.1016/j.margeo.2021.106477 , Open Access version : https://archimer.ifremer.fr/doc/00688/80046/


References of Technical Reports

Karthikeyan Vishnu, Collot Julien, Etienne Samuel, Loubrieu Benoit, Patriat MartinORCID, Vende-Leclerc Myriam, Tanguy Nina, Pertuisot CecileORCID, Soulard BenoitORCID (2022). Base de données de sondeurs multifaisceaux et modèles bathymétriques de la Nouvelle-Calédonie – hors lagon. SGNC-2022(12). https://doi.org/10.13155/91834


Etienne, S., Collot, J., Le Roy, P., Roest, W., Patriat, M., Clerc, C., Dechnick, B., Sanborn, K., Lepareur F., Horowitz, J., Largeau, M. A. (2019). Rapport de la mission océanographique SEDLAB, N/O Alis, Rapport SGNC-2019(5), 144 pp., https://doi.org/10.17600/18000401

Largeau, M. 2018. Acquisition, traitement et compilation des données bathymétriques au sein de la ZEE de Nouvelle-Calédonie. Rapport de stage professionnel de 3ème année CNAM-Intechmer réalisé au Service Géologique de Nouvelle-Calédonie. 79p.

References of International Seminar Communications

Etienne S., Walter R Roest, Julien Collot, Pascal Le Roy Sr, Elsa Tournadour, Martin Patriat, Camille Noël Clerc, Belinda Dechnik, Kelsey L Sanborn, Maria Annola Largeau, Fanny Lepareur, Jeremy Horowitz, Jody Webster, Stephan Jorry, Jean Roger and Arnaud Gaillot (2019). Large-Scale Margin Collapse of a Drowned, Isolated Carbonate Platform (Lansdowne Bank, South-West Pacific) Abstract OS33C-1807. AGU Fall Meeting, San Francisco, CA, 9-13 Dec.

References of National Seminar Communications

Etienne, S., Collot, J., Le Roy, P., Roest, W., Tournadour, E., Patriat, M., Clerc, C., Dechnick, B., Sanborn, K., Largeau, M., Lepareur, F., Horowitz, J., Webster, J., Jorry, S., Roger, J. and A. Gaillot (2019) Glissements gravitaire sous-marins de grande échelle en bordure d'une plateforme carbonatée isolée et ennoyée (Banc de Lansdowne, Sud-Ouest Pacifique). 17ème Congrès Français de Sédimentologie, Beauvais, Livre des résumés, Publication ASF n°81, Paris, p43.