The strontium isotope budget of the modern ocean
The strontium isotope budget of the modern ocean
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DOI：
10.1016/0012-821x(89)90017-4
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发表时间：
1989-02
影响因子：
5.3
通讯作者：
M. Palmer;J. Edmond
中科院分区：
文献类型：
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作者：
M. Palmer;J. Edmond
我们测量了世界上大多数主要河流的锶浓度和同位素组成。这些数据极大地扩展了已研究的地质、构造和气候流域盆地环境的范围，总体上构成了河流锶同位素数据库的两倍。这对全球径流的 87Sr/86Sr 比率进行了更准确的估计，为 0.7119；这明显高于以前的研究得出的结果。我们还确定了来自不同构造和火山成因环境的海洋热液喷口水的Sr浓度和87Sr/86Sr比率，这使我们能够进一步限制该来源的Sr同位素系统。这些新数据与之前发布的河流数据和深海沉积物中 Sr 成岩底栖通量值相结合，以获得当代海洋 Sr 同位素预算。稳态计算结果给出了通过高温脊顶热液系统的海水通量的最佳估计为1.2±0.3×1014kg/年；这大大高于最近的估计。
We have measured the Sr concentration and isotopic composition of most of the world's major rivers. These data greatly extend the range of geologic, tectonic and climatic drainage basin environments that have been studied and, overall, constitute a doubling of the fluvial Sr isotope data base. This has produced a more accurate estimate for the87Sr/86Sr ratio of global runoff of 0.7119; this is distinctly higher than obtained from previous studies. We have also determined the Sr concentration and87Sr/86Sr ratio of oceanic hydrothermal vent waters from diverse tectonic and volcanogenic environments that have allowed us to further constraint the Sr isotope systematic of this source. These new data have been combined with previously published riverine data and values for the diagenetic benthic flux of Sr from deep-sea sediments to obtain a contemporary oceanic Sr isotope budget. The results of steady-state calculations give a best estimate for the flux of seawater through high-temperature ridge crest hydrothermal system of1.2 ± 0.3 × 1014kg/yr; this is substantially higher than recent estimates.