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DOI | 10.1038/s41467-019-13514-6 |
New isotope constraints on the Mg oceanic budget point to cryptic modern dolomite formation | |
[unavailable] | |
2019-12-11 | |
发表期刊 | Nature Communications
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出版年 | 2019 |
卷号 | 10 |
文章类型 | Article |
语种 | 英语 |
英文摘要 | The oceanic magnesium budget is important to our understanding of Earth鈥檚 carbon cycle, because similar processes control both (e.g., weathering, volcanism, and carbonate precipitation). However, dolomite sedimentation and low-temperature hydrothermal circulation remain enigmatic oceanic Mg sinks. In recent years, magnesium isotopes (未26Mg) have provided new constraints on the Mg cycle, but the lack of data for the low-temperature hydrothermal isotope fractionation has hindered this approach. Here we present new 未26Mg data for low-temperature hydrothermal fluids, demonstrating preferential 26Mg incorporation into the oceanic crust, on average by 蔚solid-fluid鈥夆増鈥?.6鈥? These new data, along with the constant seawater 未26Mg over the past ~20鈥塎yr, require a significant dolomitic sink (estimated to be 1.5鈥?.9鈥塗mol鈥墆r鈭?; 40鈥?0% of the oceanic Mg outputs). This estimate argues strongly against the conventional view that dolomite formation has been negligible in the Neogene and points to the existence of significant hidden dolomite formation. |
领域 | 资源环境 |
URL | 查看原文 |
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文献类型 | 期刊论文 |
条目标识符 | http://119.78.100.173/C666/handle/2XK7JSWQ/232474 |
专题 | 资源环境科学 |
推荐引用方式 GB/T 7714 | [unavailable]. New isotope constraints on the Mg oceanic budget point to cryptic modern dolomite formation[J]. Nature Communications,2019,10. |
APA | [unavailable].(2019).New isotope constraints on the Mg oceanic budget point to cryptic modern dolomite formation.Nature Communications,10. |
MLA | [unavailable]."New isotope constraints on the Mg oceanic budget point to cryptic modern dolomite formation".Nature Communications 10(2019). |
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