Subject
[PHYS.PHYS.PHYS-GEO-PH]Physics [physics]/Physics [physics]/Geophysics [physics.geo-ph], [SDU.STU.GP]Sciences of the Universe [physics]/Earth Sciences/Geophysics [physics.geo-ph]

Domains
Géologie, Sciences de la Terre, Sciences de l'environnement

Description

Coral reefs have grown continuously during the Last 24 ka on the island of Espiritu Santo (Vanuatu, South-West Pacific) in a setting characterized by frequent tectonic uplifts related to subduction of the Australia plate beneath the Vanuatu Island arc. Sedimentological and geochemical studies of two neighbouring areas having much different mean uplift rates and environmental settings provides an opportunity to analyze the environmental factors that promoted the widespread development of microbialite crusts from about 24 to 6 ka B.P. Nutrient supplies, and probably the rapidity of the sea level rise, are critical to an explanation of the distinctive distribution of microbialites in reef cores. Nutrient flux has been related to terrigenous fluxes in the Tasmaloum reef system that fringed the south-west uplifting coast of Espiritu Santo and possibly to upwelling in the Urélapa sequence that was isolated from the main island during its growth. A peak in microbialite abundance occurred between 16 and 10 ka B.P., a time window characterized by increasing erosional processes and/or more intense upwelling during a very rapid rise in sea-level.

Keywords
Environnement, Geology, Océanographie

Language
English (en-GB)

Creators
Cabioch, Guy, Camoin, Gilbert, Webb, Gregory E., Le Cornec, Florence, Garcia Molina, Marta, Pierre, Catherine, Joachimski, Michael M.

Contributors
Paléo-environnements tropicaux et variabilité climatique (PALEOTROPIQUE), Centre européen de recherche et d'enseignement des géosciences de l'environnement (CEREGE) ; Institut de Recherche pour le Développement (IRD)-Institut National de la Recherche Agronomique (INRA)-Aix Marseille Université (AMU)-Collège de France (CdF (institution))-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS), School of Natural Resource Sciences (NRS) ; Queensland University of Technology [Brisbane] (QUT), Laboratoire d'Océanographie et du Climat : Expérimentations et Approches Numériques (LOCEAN) ; Muséum national d'Histoire naturelle (MNHN)-Institut de Recherche pour le Développement (IRD)-Université Pierre et Marie Curie - Paris 6 (UPMC)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS)-Institut Pierre-Simon-Laplace (IPSL (FR_636)) ; École normale supérieure - Paris (ENS-PSL) ; Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Université de Versailles Saint-Quentin-en-Yvelines (UVSQ)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Institut national des sciences de l'Univers (INSU - CNRS)-Université Paris Diderot - Paris 7 (UPD7)-École polytechnique (X)-Centre National d'Études Spatiales [Toulouse] (CNES)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS)-École normale supérieure - Paris (ENS-PSL) ; Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Université de Versailles Saint-Quentin-en-Yvelines (UVSQ)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris Diderot - Paris 7 (UPD7)-École polytechnique (X)-Centre National d'Études Spatiales [Toulouse] (CNES)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS), Institut für Geologie und Mineralogie (GEOL) ; Friedrich-Alexander Universität Erlangen-Nürnberg (FAU)

Sources
ISSN: 0037-0738, Sedimentary Geology, https://hal.archives-ouvertes.fr/hal-00123575, Sedimentary Geology, Elsevier, 2006, 185, pp.297-318. ⟨10.1016/j.sedgeo.2005.12.019⟩

Relation
info:eu-repo/semantics/altIdentifier/doi/10.1016/j.sedgeo.2005.12.019

Coverage
Vanuatu

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