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| DOI | 10.1038/s41561-022-00924-3 |
| Sea-level stability over geological time owing to limited deep subduction of hydrated mantle | |
| Cerpa N.G.; Arcay D.; Padrón-Navarta J.A. | |
| 发表日期 | 2022 |
| ISSN | 1752-0894 |
| 起始页码 | 423 |
| 结束页码 | 428 |
| 卷号 | 15期号:5 |
| 英文摘要 | Liquid surface oceans are a seemingly unique feature of Earth. Long-term, global sea level depends on the balance of water fluxes between Earth’s mantle and surface: between mantle degassing through volcanism and mantle regassing via the subduction of hydrous minerals. However, the overall balance of these fluxes at geological timescales remains uncertain. Geological observations suggest the stability of the long-term sea level and thus a near-steady-state regassing–degassing balance. In contrast, according to current thermopetrological modelling, the global input of H2O inferred from geophysical observations leads to an unequivocal excess of regassing relative to degassing. Here we use recent experimental high-pressure data on natural hydrated peridotites to update the thermopetrological models and to reassess the calculations of H2O fluxes into the mantle via subduction. Our models of 56 subduction transects show that a global input of 15−20 × 108 TgH2O every million years yields a limited global mantle regassing of 2.0−3.5 × 108 TgH2O every million years. The regassing occurs exclusively via the hydrated lithospheric mantle of the coldest subducting plates. Our requantification of the H2O budget associated with subduction matches the estimations of mantle degassing and suggests that global sea levels have been relatively stable over geological timescales. © 2022, The Author(s), under exclusive licence to Springer Nature Limited. |
| 语种 | 英语 |
| scopus关键词 | geological time; geophysical method; sea level; subduction zone; volcanism |
| 来源期刊 | Nature Geoscience
 |
| 文献类型 | 期刊论文 |
| 条目标识符 | http://gcip.llas.ac.cn/handle/2XKMVOVA/262213 |
| 作者单位 | Géosciences Montpellier, University of Montpellier, CNRS, University of Antilles, Montpellier, France |
| 推荐引用方式 GB/T 7714 | Cerpa N.G.； Arcay D.； Padrón-Navarta J.A.. Sea-level stability over geological time owing to limited deep subduction of hydrated mantle[J],2022,15(5). |
| APA | Cerpa N.G.； Arcay D.； Padrón-Navarta J.A..(2022).Sea-level stability over geological time owing to limited deep subduction of hydrated mantle.Nature Geoscience,15(5). |
| MLA | Cerpa N.G.； Arcay D.； Padrón-Navarta J.A.."Sea-level stability over geological time owing to limited deep subduction of hydrated mantle".Nature Geoscience 15.5(2022). |
| 条目包含的文件 | 条目无相关文件。 | |||||
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