A5103009350- Geological and Geophysical Studies
- Geological and Geochemical Analysis
- Geological formations and processes
- earthquake and tectonic studies
- Geology and Paleoclimatology Research
- Methane Hydrates and Related Phenomena
- Paleontology and Stratigraphy of Fossils
- Hydrocarbon exploration and reservoir analysis
- High-pressure geophysics and materials
- Seismic Imaging and Inversion Techniques
- Geological Modeling and Analysis
- Geomagnetism and Paleomagnetism Studies
- Geological and Geophysical Studies Worldwide
- Maritime and Coastal Archaeology
- Paleontology and Evolutionary Biology
- Soil erosion and sediment transport
- Geochemistry and Elemental Analysis
- Geochemistry and Geologic Mapping
- Parasite Biology and Host Interactions
- Vibrio bacteria research studies
- Legionella and Acanthamoeba research
- Hydrology and Sediment Transport Processes
University of New Caledonia
2017-2023
Université de Bordeaux
2010-2023
Environnements et Paléoenvironnements Océaniques et Continentaux
2009-2023
Gouvernement de la Nouvelle-Calédonie
2019-2023
Centre Hospitalier Territorial de Nouvelle-Calédonie
2017-2021
International Ocean Discovery Program
2019
Expedition (United Kingdom)
2019
Ministry of Agriculture and Forestry and Food
2019
Taranaki Base Hospital
2019
Institut de Veille Sanitaire
1997
Abstract Data from International Ocean Discovery Program (IODP) Expedition 371 reveal vertical movements of 1–3 km in northern Zealandia during early Cenozoic subduction initiation the western Pacific Ocean. Lord Howe Rise rose deep (∼1 km) water to sea level and subsided back, with peak uplift at 50 Ma north between 41 32 south. The New Caledonia Trough 2–3 55 45 Ma. We suggest these elevation changes resulted crust delamination mantle flow that led slab formation. propose a “subduction...
Abstract Eocene onset of subduction in the western Pacific was accompanied by a global reorganization tectonic plates and change plate motion relative to hotspots during period 52–43 Ma. We present seismic-reflection rock sample data from Tasman Sea that demonstrate there widespread continental oceanic compressional failure after 53–48 Ma lasted until at least 37–34 call this Tectonic Event Cenozoic Area (TECTA). Its nature is different coeval tensile stresses back-arc opening 50...
Abstract Sediment mass accumulation rate (MAR) is a proxy for paleoceanographic conditions, especially if biological productivity generated most of the sediment. We determine MAR records from pelagic calcareous sediments in Tasman Sea based on analysis 11 boreholes and >3 million seismic reflection horizon picks. Seismic data regions 10,000–30,000 km 2 around each borehole were analyzed using International Ocean Discovery Program Expedition 371 other boreholes. Local was affected by...
Abstract We present the first comprehensive seismic‐stratigraphic analysis of Fairway Basin, which is situated on rifted continent Zealandia in Tasman Sea, southwest Pacific, between Australia and New Caledonia. The basin 700 km long, 150 wide, has water depths 500–3000 m. describe depositional architecture paleogeographic evolution this basin. Basin formation was concurrent with two tectonic events: (i) Cretaceous rifting during eastern Gondwana breakup (ii) initiation Cenozoic...
Abstract One of the largest ophiolitic peridotite masses in world covers a quarter island Grande Terre, New Caledonia. The Peridotite Nappe was obducted during Eocene, is weakly deformed, and corresponds to highest structurally simple pile thrust nappes. We present new marine seismic data that allow us track offshore continuation along strike for distance more than 500 km south Caledonia image its preobduction, synobduction, postobduction sedimentary records. Offshore, underlies ~150 wide 2...
Abstract In New Caledonia, the cover refers to autochthonous Late Cretaceous Paleogene sedimentary and volcanic formations unconformably overlying basement rocks underlying allochthonous nappes. The first period of deposition, broadly from Paleocene ( c. 105–56 Ma) was controlled by extension rifting. second period, Eocene 56–34 Ma), dominated convergence contraction. part consists synrift conglomerates coal-bearing deposits with interlayered bimodal, subduction-related intra-plate rocks....
Abstract New rock dredge samples supply key information to establish the tectonic and geological framework of northern two‐thirds 95% submerged Zealandia continent. The R/V Investigator voyage IN2016T01 Fairway Ridge, Coral Sea, obtained poorly sorted poly‐lithologic pebbly cobbly sandstones, well fine grained mudstones, bioclastic limestones, basaltic lavas. Post‐cruise analytical work comprised petrography, whole geochemical Sr Nd isotopic analyses, U‐Pb zircon, Rb‐Sr, Ar‐Ar geochronology....
Abstract The post-obduction formations of Grande Terre, New Caledonia, comprise igneous intrusions, regolith cover, and marine terrestrial sedimentary rocks. Two restricted Late Oligocene granitoid bodies are intruded into the Peridotite Nappe its substrate in south island. Thick cover developed over from or earlier. Népoui Group comprises Oligocene–Early Miocene mixed carbonate siliciclastic deposits. It mainly reworks cover. Its development pattern is controlled by tectonic uplift...
Abstract Norfolk Ridge bounds the northeastern edge of continent Zealandia and is proximal to where Cenozoic Tonga‐Kermadec subduction initiation occurred. We present analyze new seismic reflection, bathymetric rock data from that show it composed a thick sedimentary succession was formed acquired its present‐day ridge physiography architecture during Eocene Oligocene uplift, emergence erosion. Contemporaneous subsidence adjacent New Caledonia Trough shaped western slope accompanied by...
Abstract Classically, deepwater fold‐and‐thrust belts are classified in two main types, depending if they result from near‐ or far‐field stresses and the understanding of their driving triggering mechanism is poorly known. We present a geophysical data set off western margin New Caledonia (SW Pacific) that reveals deformed structures belt we interpret as near‐field gravity‐driven system, which not located at rifted passive margin. The factor deformation inferred to be oversteepening slope by...
New age and geochemical data are used to investigate the origin of a ∼670 km-long line eight seamount volcanoes along western side Norfolk Ridge between Caledonia Zealand. Altered lavas limestones were dredged from three during 2015 Volcanic Evolution South Pacific Arcs cruise N/O l'Atalante, so total four, including northernmost southernmost, have now been directly sampled analysed. Dating lava volcanic breccia clasts by Ar–Ar methods gives north-to-south ages these sites 31.3 ± 0.6, 33 5,...
Abstract The mineral resources of the non-ultramafic rocks New Caledonia and its Exclusive Economic Zone can be classified according to their host rocks. metallic are essentially associated with volcanic magmatic activity. Non-economic volcanogenic massive sulfide deposits Cu Au located in Late Carboniferous Koh Ophiolite Cretaceous Poya Terrane. Base metals, Ag sedimentary–exhalative type present metamorphic Diahot-Panié Metamorphic Complex, syn-rift volcanism. An Au–Sb metallogenic...
Abstract The 2015 VESPA voyage (Volcanic Evolution of South Pacific Arcs) was a seismic and rock dredging expedition to the Loyalty Three Kings Ridges Fiji Basin. In this paper we present 33 40 Ar/ 39 Ar, 22 micropaleontological, two U/Pb ages for igneous sedimentary rocks from dredge sites in little‐studied part southwest Ocean. Igneous include basalts, dolerites, basaltic andesites, trachyandesites, granite. Successful Ar/Ar dating altered and/or low‐K basalts achieved through careful...
Abstract The absolute position during the Cenozoic of northern Zealandia, a continent that lies more than 90% submerged in southwest Pacific Ocean, is inferred from global plate motion models, because local paleomagnetic constraints are virtually absent. We present new paleolatitude using data International Ocean Discovery Program Site U1507 on Zealandia and U1511 drilled adjacent Tasman Sea Basin. After correcting for inclination shallowing, five estimates provide trajectory past middle...
Located in the South-West Pacific, at northern extremity of mostly submerged Zealandia continent, New Caledonian Exclusive Economic Zone (EEZ) covers 1,470,000 km² and includes basins, ridges seamounts where abundant ferromanganese crusts have been observed. Several investigations conducted since 1970s on nature composition from Caledonia’s ridges, but none covered entire EEZ. We present data 104 collected EEZ during twelve oceanographic cruises between 1974 2019. Samples were analysed for...