A5068191426- Geological formations and processes
- Geological and Geochemical Analysis
- Geological and Geophysical Studies
- Geological and Geophysical Studies Worldwide
- Geology and Paleoclimatology Research
- earthquake and tectonic studies
- Geological Modeling and Analysis
- Radioactive contamination and transfer
- Religious Tourism and Spaces
- Medieval European History and Architecture
- Geochemistry and Geologic Mapping
- Graphite, nuclear technology, radiation studies
- Radioactivity and Radon Measurements
- Radiation Dose and Imaging
- Nuclear and radioactivity studies
- Maritime and Coastal Archaeology
- Methane Hydrates and Related Phenomena
- Geological Studies and Exploration
- High-pressure geophysics and materials
- Pacific and Southeast Asian Studies
- Risk and Safety Analysis
- Seismic Waves and Analysis
- Medieval and Early Modern Justice
- Marine and environmental studies
- Paleontology and Stratigraphy of Fossils
Bureau de Recherches Géologiques et Minières
2014-2024
Walloon Agricultural Research Centre
2024
United States Geological Survey
2024
Université de Strasbourg
2023
Centre National de la Recherche Scientifique
2007-2023
Centre Michel de Boüard
2015-2023
Laboratoire de Planétologie et Géosciences
2023
Nantes Université
2023
Université de Caen Normandie
2015-2021
Université de Rennes
2007-2011
A multichannel seismic reflection profile acquired during the SISMAORE cruise (2021) provides first in-depth image of submarine volcanic edifice, named Fani Maore, that formed 50 km east Mayotte Island (Comoros Archipelago) in 2018–2019. This new edifice sits on a ∼140 m thick sedimentary layer, which is above major, layer up to ∼1 and extends over 120 along profile. unit made several distinct facies indicate successive phases. We interpret this as witnessing main phase construction edifice....
Geophysical and geological data from the North Mozambique Channel acquired during 2020–2021 SISMAORE oceanographic cruise reveal a corridor of recent volcanic tectonic features 200 km wide 600 long within north Comoros Archipelago. Here we identify describe two major submarine tectono-volcanic fields: N’Droundé province oriented N160°E Grande-Comore Island, Mwezi N130°E Anjouan Mayotte Islands. The presence popping basaltic rocks sampled in suggests post-Pleistocene activity. geometry...
Following a report of Phytophthora pluvialis in the United Kingdom 2021 (Pérez-Sierra et al., 2022), surveillance for this forest pathogen started 2023 southern Belgium. Douglas fir (Pseudotsuga menziesii) was surveyed as it is an economically important conifer species and major host P. pluvialis. Fifteen plantations close to streams were visited between May October. Two monitoring methods used: checking trees symptoms disease (shoot dieback, resinous cankers, needle loss) baiting using qPCR...
The influence of eustasy, tectonic deformation and sediment flux as controlling parameters on basin stratigraphy depositional sequence development are largely accepted.Eustasy is usually considered the dominant mechanism generation, especially for Pleistocene age successions.In active subduction margin settings, high rates expected to have a stronger fill architecture, while generally less well constrained, therefore frequently considered.The Hikurangi in New Zealand offers opportunity...
Research Article| May 01, 2011 Controls on active forearc basin stratigraphy and sediment fluxes: The Pleistocene of Hawke Bay, New Zealand Fabien Paquet; Paquet * 1UMR Geosciences, Centre National de la Recherche Scientifique, Université Rennes 1, Campus Beaulieu, 35042 cedex, France3Department Geological Sciences, University Canterbury, Private Bag 4800, Christchurch, Zealand4Bureau Recherches Géologiques et Minières Scientifique Technique, Geology division - Sedimentary Basins, 3 avenue...
Reliability of the ICRP's Dose Coefficients for Members Public, II. Uncertainties in Absorption Ingested Radionuclides and Effect on Estimates Get access J. D. Harrison, Harrison Search other works by this author on: Oxford Academic PubMed Google Scholar R. W. Leggett, Leggett Noßke, Noßke F. Paquet, Paquet A. Phipps, Phipps M. Taylor, Taylor H. Metivier Radiation Protection Dosimetry, Volume 95, Issue 4, 1 June 2001, Pages 295–308, https://doi.org/10.1093/oxfordjournals.rpd.a006554...
The “Fani Maoré” eruption off the coasts of Mayotte has been intensively monitored by applying methods similar to those used for subaerial eruptions. Repeated high-resolution bathymetric surveys and dredging, coupled with petrological analyses time-constrained samples, allowed tracking evolution magma over whole submarine eruptive sequence. Indeed, after one year direct ascent (Phase 1), basanitic switched a different pathway that sampled tephri-phonolitic subcrustal reservoir 2). Later,...
Unlike subaerial volcanic activity, deep submarine eruptions are difficult to detect, observe and monitor. The objective of this paper is describe a large complex region, named the Horseshoe area, recently discovered at ∼1500 m below sea level on eastern upper slope Mayotte Island. area crucial because, since 2018, it has experienced an exceptionally seismic activity associated with ongoing eruption that formed new edifice, Fani Maoré, about 40 km east. We present results multiscale study,...
Abstract The geology of the Channel Western Approaches is a key to understand post-rift evolution NW European continental margin in relation with Europe/Africa collision. Despite considerable evidence Tertiary tectonic inversion throughout basin, structures and amplitudes movements remain poorly documented across French sector Approaches. effect for “Channel River”, major system that flowed into English during Plio-Quaternary eustatic lowstands, also needs be clarified. Its drainage basin...
Volcanic eruptions shape Earth's surface and provide a window into deep Earth processes. How the primary asthenospheric melts form, pond ascend through lithosphere is, however, still poorly understood. Since 10 May 2018, magmatic activity has occurred offshore eastern Mayotte (North Mozambique channel), associated with large displacements, very-low-frequency earthquakes exceptionally earthquake swarms. Here we present geophysical marine data from MAYOBS1 cruise, which reveal that by 2019,...
Abstract The passive margin of the Guiana Shield formed at junction Central and Equatorial Atlantic Oceans that developed successively by a complex rifting process achieved final dispersal Western Gondwana. Yet, resulting spatial distribution crustal thinning along remains to be mapped its controlling parameters deciphered. We used subsurface data map variability margin. show segments width primarily depends on their obliquity extension direction. necking domain transform/oblique is much...
Heat flow in the Northern Mozambique Channel is poorly constrained, with only a few old measurements indicating relatively low values of 55–62mW/m 2 . During SISMAORE cruise to Channel, we obtained new heat at four sites, using sediment corers equipped thermal probes. Three sites yield 42–47 mW/m , confirming regional this area. Our are consistent Jurassic oceanic lithosphere around Mayotte, although presence very thin continental crust or fragments could also explain observed flow. do not...
Since May 2018 till the end of 2021, Mayotte island has been locus a major submarine volcanic eruption characterized by offshore emission more than 6.5 km 3 basanitic magma. The occurred along WNW–ESE trending ridge on east flank where, in addition, several seemingly recent phonolitic bodies were also identified close to island. To define realistic scenarios magma ascent and potentially predict style an upcoming event, it is crucial have precise understanding plumbing system operating below...
Geological mapping of the Mayombe Chain and Niari Basin Congo Brazzaville allows for first time defining structural architecture metamorphism West Belt. Four different tectono-metamorphic domains, separated by crustal-scale shear zones, are now distinguished (Niari (NB), Eastern (EMC), Central (CMC) Western (WMC) Chain). The NB is marked only weak regional deformation under middle to upper diagenetic conditions. It delimited in west from EMC Mount Belo Shear Zone forming terminal thrust...
Journal Article Effect of Absorption Parameters on Calculation the Dose Coefficient: Example Classification Industrial Uranium Compounds Get access V. Chazel, Chazel Search for other works by this author on: Oxford Academic PubMed Google Scholar P. Houpert, Houpert F. Paquet, Paquet E. Ansoborlo Radiation Protection Dosimetry, Volume 94, Issue 3, 1 April 2001, Pages 261–268, https://doi.org/10.1093/oxfordjournals.rpd.a006498 Published: 01 2001
Producing accurate structural maps is a pre-requisite to unravel the tectonic evolution of region. For this purpose, magnetic anomaly are helpful data sets for identification and mapping geological features. We compiled 154 marine surveys 7 aeromagnetic campaigns covering Bay Biscay, its surrounding continental shelves western part Pyrenees. As initial had heterogeneous acquisition parameters, we applied series transforms before merging data. performed variable reduction pole localize...