Observatoire de l'environnement Nouvelle Calédonie

Il y a environ 2308 résultats pour les termes de recherche: ~riviere OR creek OR eau douce

Affichage des résultats: 1101 à 1110

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Slab-derived origin of tremolite-antigorite veins in a supra-subduction ophiolite; the Peridotite Nappe (New Caledonia) as a case study.

Hydration of mantle peridotites provides information on the exhumation history and on the fluid regime accompanying exhumation of these rocks (reservoirs involved, fluid/rock ratios, temperature of interaction). Highly depleted harzburgites and dunit...

Post-obduction carbonate system development in New Caledonia (Népoui, Lower Miocene)

For the first time, depositional models of Lower Miocene carbonate systems from New Caledonia (Southwest Pacific) are proposed, on the basis of a sedimentological and paleoenvironmental study of both cores and outcrops. In the Népoui area, two dis...

Late paleozoic pre and syn-kinematic plutons of the Kangguer-Huangshan shear zone : inference on the tectonic evolution of the eastern Chinese North T...

Permian large-scale transcurrent tectonics and massive magmatism are prominent features of the Tianshan belt and neighboring regions of the Central Asian Orogenic Belt. Structural, geochronological and geochemical analyses of Carboniferous and Permia...

Nickel mass balance and isotopic records in a serpentinic weathering profile: Implications on the continental Ni budget

During serpentinite rock weathering, Ni is concentrated in the regolith owing to residual and secondary enrichment, forming a Ni-rich deposit under tropical conditions. This study presents geochemical, isotopic, and mineralogical data for Ni from the...

Effects of ultramafic topsoil stockpiling during mine activities on its microbial diversity and other microbiological and physicochemical characterist...

Nowadays, ecological restoration is considered the best solution for the rehabilitation of mining-degraded areas, particularly when it concerns valuable ecosystems. This is the case in New Caledonia, a hot spot of biodiversity, with 82% of endemic pl...

Accounting for the indirect area effect in stacked species distribution models to map species richness in a montane biodiversity hotspot

Aim Understanding how species richness is distributed is a critical prerequisite to implement efficient conservation strategies in biodiversity hotspots. Stacked species distribution models (S-SDMs) provide new opportunities to map species richness, ...

Morphology and distribution of dolines on ultramafic rocks from airborne LiDAR data: the case of southern Grande Terre in New Caledonia (SW Pacific)

Dolines are closed geomorphological depressions which are surface manifestations of karstic systems. Usually developed on limestones, they also typify the morphology of the New Caledonian landscape, particularly on the southern massif of the main isl...

Demande d'autorisation de défrichement - Etude d'impact environnemental - Mine Ada

Dans le cadre de l'exploitation minière de la mine Ada, des activités de défrichement doivent être réalisées. L'exploitation de la mine Ada a été autorisée par l'arrêté n°1972-2011/ARR/DIMENC du 7 juillet 2011 et l'arrêté modificatif n�...

Suivi de la faune dulcicole 2014 pour Vale Nouvelle-Calédonie

Depuis 1996, les exploitants de l'usine d'extraction de minerai (latérites et saprolites) et de production de nickel et de cobalt, située dans le Sud de la Nouvelle-Calédonie, effectuent un suivi de la faune aquatique et du peuplement piscicole...

Etude de la Zone Inondable de la Voh et la Faléane

Cette étude vise à définir ou actualiser la cartographique des zones inondables de la Voh pour les crues de périodes de retour 5, 10 et 100 ans, et d'actualiser la cartographie des aléas pour la crue centennale de la Voh. Etude réalisée par I...