Boundary Exchange

Local geologies imprint the Antarctic Bottom Water neodymium isotopic signatures

Dissolved neodymium (Nd) isotopes and concentrations were measured at six stations in the Australian sector of the Southern Ocean, targeting the study of the Adelie Land Bottom Water (ALBW), a variety of Antarctic Bottom Water formed off the Adélie Land coast of East Antarctica. Lambelet and co-authors (2018, see reference below) present the first dissolved […]

Dec / 11 / 2018

Neodymium isotopic signature of the Ross Sea Water characterized

The first seawater neodymium isotopic compositions (εNd) and neodymium concentrations [Nd] profiles across the South Pacific circum-Antarctic fronts have been published recently (Basak et al., 2015, see reference below). Thanks to this exceptional GEOTRACES-compliant data, collected on R/V Polarstern cruise PS75, authors characterize the εNd signature of Ross Sea Bottom Water (εNd ~ -7) and show that […]

Jun / 12 / 2015

Neodymium isotopic compositions and rare earth element data evidence boundary exchange in the southwestern tropical and equatorial Pacific

New rare earth element (REE) concentrations and neodymium (Nd) isotopic compositions measured between the southwestern Tropical and the central equatorial Pacific (112 samples) support the hypothesis that the main process driving the geochemical supply in this area is boundary exchange. Nd signatures confirm the major role of the Papua New Guinea coast but also reveal […]

May / 21 / 2013

Ocean margins: the missing term for oceanic element budgets?

Jeandel, Catherine, Peucker-Ehrenbrink, Bernhard, Jones, Morgan T., Pearce, Christopher R., Oelkers, Eric H., Godderis, Yves, Lacan, François, Aumont, 0livier and Arsouze, Thomas This paper underlines how poor is our understanding of the land-to-ocean element flux and rises the question of the “submarine weathering”. Indeed, isotopes of Nd, Si, Fe, Ra as well as REE, TDFe […]

Jul / 21 / 2011