Magnesium/calcium ratio of the foraminifera Oridorsalis umbonatus in surface sediment samples off Namibia
| Cobertura |
MEDIAN LATITUDE: -25.295278 * MEDIAN LONGITUDE: 13.445556 * SOUTH-BOUND LATITUDE: -25.610000 * WEST-BOUND LONGITUDE: 12.935000 * NORTH-BOUND LATITUDE: -24.251667 * EAST-BOUND LONGITUDE: 13.686667 * DATE/TIME START: 2003-02-12T00:00:00 * DATE/TIME END: 2003-02-27T00:00:00 |
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| Data(s) |
10/06/2004
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| Resumo |
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. |
| Formato |
application/zip, 6 datasets |
| Identificador |
https://doi.pangaea.de/10.1594/PANGAEA.726732 doi:10.1594/PANGAEA.726732 |
| Idioma(s) |
en |
| Publicador |
PANGAEA |
| Direitos |
CC-BY: Creative Commons Attribution 3.0 Unported Access constraints: unrestricted |
| Fonte |
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, doi:10.1029/2004GC000808 |
| Palavras-Chave | #Center for Marine Environmental Sciences; CTD; Depth; Depth, bottom/max; DEPTH, sediment/rock; Depth, top/min; Depth bot; Depth top; GeoB8403-1; GeoB8430-2; GeoB8449-1; GeoB8450-1; GeoB8452-1; GeoB8462-4; Lab no; LA-ICP-MS, Laser-ablation inductively coupled plasma mass spectrometer; M57/2; MARUM; Mean; Mean, statistical; Meteor (1986); MUC; MultiCorer; O. umbonatus Mg/Ca; Oridorsalis umbonatus, Magnesium/Calcium ratio; Sample, optional label/labor no; Standard deviation; Std dev; Temp; Temperature, water; Walvis Bay/Namibia |
| Tipo |
Dataset |
