Neodymium isotopic study of Baffin Bay water: sources of REE from very old terranes
Neodymium isotopic study of Baffin Bay water: sources of REE from very old terranes
复制标题
巴芬湾水的钕同位素研究：来自非常古老地体的稀土元素来源
DOI：
10.1016/0012-821x(86)90138-x
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发表时间：
1986
影响因子：
5.3
通讯作者：
G. Wasserburg
中科院分区：
文献类型：
--
作者：
M. C. Stordal;G. Wasserburg
从巴芬湾及其周围地区采集了水样，以评估该地区是从古老的大陆物质到大西洋水的ND的潜在来源。同位素数据范围从εND(0)=−9.0到−26，大部分数据在εND(0)=−20附近，而北大西洋深水的εND(0)=−13.5。巴芬湾水域中ND的浓度高达6×10−12g/g，而NADW为2.5×10−12g/g。低εNd值和高Nd值的组合表明，巴芬湾可能是来自非常古老的地壳物质的重要Nd源。使用一个简单的盒子模型评估了NADW对ND预算的贡献，得出的结论是，维持NADW同位素组成所需的相当大一部分来自古代地壳来源的ND可以由巴芬湾流出提供。
Water samples were collected from Baffin Bay and surrounding areas in order to evaluate this region as a potential source of Nd from old continental material to Atlantic water. The isotopic data ranged fromεNd(0) = −9.0 to −26with most of the data aroundεNd(0) = −20compared with values of North Atlantic Deep Water (NADW) withεNd(0) = −13.5. The concentration of Nd in Baffin Bay waters was as high as 6 × 10−12g/g compared with 2.5 × 10−12g/g for NADW. The combination of lowεNdand high Nd concentration indicates that Baffin Bay may be a significant source of Nd from very old crustal material. A simple box model was used to evaluate the contribution to the Nd budget of NADW and it was concluded that a substantial fraction of the Nd from ancient crustal sources that is required to maintain the isotopic composition of NADW could be supplied by Baffin Bay outflow.