Unknown
PANGAEA
In:
Supplement to: Rathmann, Söhnke; Hess, Silvia; Kuhnert, Henning; Mulitza, Stefan (2004): Mg/Ca ratios of the benthic foraminifera Oridorsalis umbonatus obtained by laser ablation from core top sediments: Relationship to bottom water temperatures. Geochemistry, Geophysics, Geosystems, 5(12), Q12013, https://doi.org/10.1029/2004GC000808
Publication Date:
2024-03-02
Description:
A laser ablation system connected to an inductively coupled plasma mass spectrometer was used to determine Mg/Ca ratios of the benthic foraminifera Oridorsalis umbonatus. A set of modern core top samples collected along a depth transect on the continental slope off Namibia (320-2300 m water depth; 2.9° to 10.4°C) was used to calibrate the Mg/Ca ratio against bottom water temperature. The resulting Mg/Ca-bottom water temperature relationship of O. umbonatus is described by the exponential equation Mg/Ca = 1.528*e**0.09*BWT. The temperature sensitivity of this equation is similar to previously published calibrations based on Cibicidoides species, suggesting that the Mg/Ca ratio of O. umbonatus is a valuable proxy for thermocline and deep water temperature.
Keywords:
Center for Marine Environmental Sciences; GeoB8403-1; GeoB8430-2; GeoB8449-1; GeoB8450-1; GeoB8452-1; GeoB8462-4; M57/2; MARUM; Meteor (1986); MUC; MultiCorer; Walvis Bay/Namibia
Type:
Dataset
Format:
application/zip, 6 datasets
Permalink
|
Location |
Call Number |
Expected |
Availability |