Nd/Ca ratios in plankton-towed and core top foraminifera ...

• Main Authors: Martínez-Botí, Miquel Àngel, Vance, Derek, Mortyn, P Graham
• Format: Article in Journal/Newspaper
• Language: English
• Published: PANGAEA 2009
• Subjects: MultiCorer; Underway cruise track measurements; POS334; ARK-XXI/1a; TT057; Poseidon; Polarstern; Thomas G. Thompson; Norwegian Sea
• Online Access: https://dx.doi.org/10.1594/pangaea.728595; https://doi.pangaea.de/10.1594/PANGAEA.728595

Planktic foraminifera have been used as recorders of the neodymium (Nd) isotopic composition of seawater, although there is still controversy over the precise provenance of the Nd signal. We present an extensive, multispecific plankton tow Nd/Ca data set from several geographic locations (SE Atlantic, NE Atlantic, Norwegian Sea, and western Mediterranean), together with core top samples from the Mediterranean region. The range of Nd/Ca ratios in plankton-towed foraminifera, cleaned only of organic material, from all regions (0.01-0.7 µmol/mol), is similar to previously published analyses of sedimentary foraminifera cleaned using both oxidative and reductive steps, with distribution coefficients (Kd) ranging between 4 and 302. For the Mediterranean, where core top and plankton tow data are both available, the range for plankton tows (0.05-0.7 µmol/mol) is essentially identical to that for the core tops (0.1-0.5 µmol/mol). Readsorption of Nd during cleaning is ruled out by the fact that the plankton tow ... : Supplement to: Martínez-Botí, Miquel Àngel; Vance, Derek; Mortyn, P Graham (2009): Nd/Ca ratios in plankton-towed and core top foraminifera: Confirmation of the water column acquisition of Nd. Geochemistry, Geophysics, Geosystems, 10(8), Q08018 ...