Mg/Ca ratios of the benthic foraminifera Oridorsalis umbonatus obtained by laser ablation from core top sediments: Relationship to bottom water temperature
Mg/Ca ratios of the benthic foraminifera Oridorsalis umbonatus obtained by laser ablation from core top sediments: Relationship to bottom water temperature
复制标题
通过激光烧蚀岩心顶部沉积物获得的底栖有孔虫 Oridorsalis umbonatus 的 Mg/Ca 比值：与底部水温的关系
DOI：
10.1029/2004gc000808
复制
发表时间：
2004
期刊：
影响因子：
3.7
通讯作者：
S. Mulitza
中科院分区：
文献类型：
--
作者：
S. Rathmann;S. Hess;H. Kuhnert;S. Mulitza
利用激光烧蚀系统和电感耦合等离子体质谱仪测定了底栖有孔虫Oridorsalis umbonatus的Mg/Ca比值。沿着纳米比亚外大陆坡的一个深度断面（水深320-2300米; 2.9°至10.4°C）采集了一组现代岩心顶部样品，用于根据底层水温校准Mg/Ca比率。结果表明，Mg/Ca值与O. umbonatus由指数方程Mg/Ca = 1.528*e0.09*BWT描述。该方程的温度敏感性与先前发表的基于Cibicidoides物种的校准相似，表明O. umbonatus是一个有价值的温跃层和深水温度的代理。
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*e0.09*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.