Multibeam echosounder data from the French civil Research vessels, archived at SISMER (IFREMER)

Reconnaissance geophysique, geologique, petrographique et geochimique systematique du point triple de Rodriguez ou convergent trois dorsales medio-oceanique. Exploration geophysique, geologique, petrographiqueet geochimique d'un segment de la zone axiale de chacune des trois dorsales. Reconnaissance, dans le bassin de Wharton, d'une dorsale fossile.

Acquirement of multibim bathymetric datas along the south-west indian ridge between 57°E ans the Rodrigues triple junction.

Bathymetry of the French Guiana margin: the digital terrain model results from data compilation of 3 multibeam surveys conducted on the French research vessel RV L’Atalante. Grid resolution is 250 m. The DTM was processed as part of the French national program (EXTRAPLAC) for the delineation of the outer limit of the continental shelf beyond 200 nautical miles. - Guyaplac, 2003, R/V Atalante: Main source of the DTM was a cruise funded by the French National programme EXTRAPLAC. https://doi.org/10.17600/3010050 - Lobestory, 2004, R/V L'Atalante, https://doi.org/10.17600/4010030 - Cither1, 1993, R/V L'Atalante, https://doi.org/10.17600/93000010

Bathymetry – Lesser Antilles volcanic arc: compilation of multibeam data, grid resolution 1/16 arc minute, 2020. Restriction : the DTM largely overlaps national EEZ. The entire product cannot be freely disseminated. Processing : Since the beginning of the 1990s, the scientific exploration of the West Indian arc has provided the opportunity for regular acquisition of multibeam bathymetry. About twenty scientific cruises and valued transits feed a remarkable database and offer a wide bathymetric coverage of this geological structure. They were assembled to produce a bathymetric model of the entire region. Multibeam data were controlled and processed with the Ifremer Globe software. A similar processing flow is applied to each dataset: - Selection of relevant profiles for acoustic coverage of the study area - Automatic and manual filtering of outliers and erroneous data - Control of overlapping zones - Production of a digital terrain model. Depth layer is calculated as the average of soundings in each pixel. All DTMs are merged into a unique DTM for the area. The final product is a double-layer raster at 1/16 minute steps (~ 100 m), a bathymetric layer and data source identifier layer. Data processing is described in this specific report : "Talbot Sophie (2019). Evaluation d'une méthodologie pour la compilation de données bathymétriques." https://w3.ifremer.fr/archimer/doc/00613/72480/ Multibeam data from scientific cruises from 1992 to 2017: - ESCARTIN Javier, LE FRIANT Anne, FEUILLET Nathalie (2017) SUBSAINTES cruise, RV L'Atalante, https://doi.org/10.17600/17001000 - MARCAILLOU Boris, KLINGELHOEFER Frauke (2016) ANTITHESIS 3 cruise, RV Pourquoi pas ?, https://doi.org/10.17600/16001700 - MARCAILLOU Boris, KLINGELHOEFER Frauke (2013) ANTITHESIS LEG1 cruise, RV L'Atalante, https://doi.org/10.17600/13010070 - FEUILLET Nathalie (2009) GWADASEIS cruise, RV Le Suroît, https://doi.org/10.17600/9020020 - LEBRUN Jean Frédéric (2009) KASHALLOW 2 cruise, RV Le Suroît, https://doi.org/10.17600/9020010 - LAIGLE Mireille, LEBRUN Jean Frédéric, HIRN Alfred (2007) SISMANTILLES 2 cruise, RV L'Atalante, https://doi.org/10.17600/7010020 - PATRIAT Martin (2007) ANTIPLAC cruise, RV L'Atalante, https://doi.org/10.17600/7010010 - DEPLUS Christine, BOUDON Georges (2002) CARAVAL cruise, RV L'Atalante, https://doi.org/10.17600/2010030 - MASCLE Alain (2002) CARAMBA cruise, RV L'Atalante, https://doi.org/10.17600/2010010 - DEPLUS Christine (1998) AGUADOMAR cruise, RV L'Atalante, https://doi.org/10.17600/98010120 - LE PICHON Xavier, LALLEMANT Siegfried (1992) MANON cruise, RV L'Atalante, https://doi.org/10.17600/92000211 Valued transits Leve_smf (https://doi.org/10.17600/16010800), Lobestory (https://doi.org/10.17600/4010030), Guyaplac (https://doi.org/10.17600/3010050), TRtoufdf, transit from Toulon to Fort-de-France Dormasis (https://doi.org/10.17600/92000411), Faranaut/15N (https://doi.org/10.17600/92000311), Fara-Seadma1 (https://doi.org/10.17600/91004411), Fara Published DTM : Ryan, W.B.F., S.M. Carbotte, J.O. Coplan, S. O'Hara, A. Melkonian, R. Arko, R.A. Weissel, V. Ferrini, A. Goodwillie, F. Nitsche, J. Bonczkowski, and R. Zemsky (2009), Global Multi-Resolution Topography synthesis, Geochem. Geophys. Geosyst., 10, Q03014, doi: 10.1029/2008GC002332

Reconnaissance geophysique, geologique, petrographique et geochimique systematique du point triple de Rodriguez ou convergent trois dorsales medio-oceanique. Exploration geophysique, geologique, petrographiqueet geochimique d'un segment de la zone axiale de chacune des trois dorsales. Reconnaissance, dans le bassin de Wharton, d'une dorsale fossile.

Bathymetry around the Kerguelen Islands: the Digital Terrain Model results from the data compilation of multibeam surveys from 1998 to 2011. Grid resolution is 200 m. The DTM has been processed as part of the French national program (EXTRAPLAC) for the delineation of the outer limit of the continental shelf beyond 200 nautical miles - MD137-Kergueplac1 cruise, ROEST Walter (2004), RV Marion Dufresne, https://doi.org/10.17600/4200040 - MD 150 /DELCANO RISE-KERGUEPLAC2 cruise, ROEST Walter (2005), RV Marion Dufresne, https://doi.org/10.17600/5200060 - MD 165 / KERGUEPLAC 3 cruise, VIALLY Roland, BRUNET Christian, ROYER Jean-Yves (2008), RV Marion Dufresne, https://doi.org/10.17600/8200010 - KERIMIS-MD109 cruise, SCHLICH Roland (1998), RV Marion Dufresne, https://doi.org/10.17600/98200010 - VT 51 / OISO 6 cruise, METZL Nicolas, PIERRE Catherine (2001), RV Marion Dufresne, https://doi.org/10.17600/1200010 - MD 125 / SWIFT BIS-CARHOT cruise, ASLANIAN Daniel, HUMLER Eric, MICHEL Elisabeth (2002), RV Marion Dufresne, https://doi.org/10.17600/2200020 - MD 136 / VIGO cruise, MICHEL Elisabeth (2004), RV Marion Dufresne, https://doi.org/10.17600/4200110 - MD 185 / INDIEN SUD 1 cruise, MAZAUD Alain, MICHEL Elisabeth (2011), RV Marion Dufresne, https://doi.org/10.17600/11200030) - MD 189 / INDIEN SUD 2 cruise, MAZAUD Alain, MICHEL Elisabeth (2012), RV Marion Dufresne, https://doi.org/10.17600/12200010)

Geophysical and geochemical study of the Pacific-Antarctic ridge between S65/W175 and S60/W150. The first objective was to contribute to the understanding and modelling of the mechanisms of ocean ridge functioning on the scale of the basic accretion unit (< 100 km). The second was to study the zoning of the upper mantle on various scales, through investigating the geochemical signature of rocks from the axial valley. This cruise falls under the framework of the Inter-Ridge programme and is the result of cooperation between IFREMER/DRO/GM, INSU (CNRS,IPG, GRGS), Washington State University, Scripps (University of California) and the University of Chiba (Japan).