Experimental constraints on serpentinite carbonation in the presence of a H2O-CO2-NaCl fluid
文献类型：期刊论文
| 作者 | Huang, Yongsheng2,3; Okumura, Satoshi7; Matsumoto, Kazuhisa7; Takahashi, Naoko5; Tang, Hong8; Wu, Guoji2,3,4; Tsujimori, Tatsuki7,9; Nakamura, Michihiko7; Okamoto, Atsushi1; Li, Yuan2,3,6
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| 刊名 | CONTRIBUTIONS TO MINERALOGY AND PETROLOGY
 |
| 出版日期 | 2024-11-01 |
| 卷号 | 179期号:11页码:26 |
| 关键词 | Carbon cycle Bending fault Serpentinite carbonation Salinity CO2 sequestration |
| ISSN号 | 0010-7999 |
| DOI | 10.1007/s00410-024-02175-4 |
| 英文摘要 | Serpentinite carbonation contributes to the deep carbon (C) cycle. Recently, geophysical and numerical studies have inferred considerable hydrothermal alteration in plate bending faults, opening the possibility of significant C storage in the slab mantle. However, there is a lack of quantitative determination of C uptake in serpentinized mantle rocks. Here, we experimentally constrain serpentinite carbonation in H2O-CO2-NaCl fluids to estimate C uptake in hydrated mantle rocks. We find that serpentinite carbonation results in the formation of talc and magnesite along the serpentinite surface. The presence of porous reaction zones (49.2% porosity) promotes the progress of carbonation reactions through a continuous supply of CO2-bearing fluids to the reaction front. Added NaCl effectively decreases the serpentinite carbonation efficiency, particularly at low salinities (< 5.0 wt%), which is likely attributed to the reduction in fluid pH and the transport rate of reactants, and the increase in magnesite solubility. Based on previous and our experiments, we fit an empirical equation for the reaction rate of serpentinite carbonation. Extrapolation of this equation to depths of plate bending fault systems suggests that serpentinite carbonation may contribute to an influx of up to 7.3-28.5 Mt C/yr in subduction zones. Our results provide new insights into serpentinite carbonation in environments with high fluid salinities and potentially contribute to the understanding of the C cycle in subduction zones. |
| WOS研究方向 | Geochemistry & Geophysics ; Mineralogy |
| 语种 | 英语 |
| WOS记录号 | WOS:001331300600001 |
| 源URL | [http://ir.gig.ac.cn/handle/344008/81209]  |
| 专题 | 同位素地球化学国家重点实验室 |
| 通讯作者 | Huang, Yongsheng |
| 作者单位 | 1.Tohoku Univ, Grad Sch Environm Studies, Sendai, Japan 2.Chinese Acad Sci, Guangzhou Inst Geochem, State Key Lab Isotope Geochem, Guangzhou 510640, Peoples R China 3.CAS Ctr Excellence Deep Earth Sci, Guangzhou 510640, Peoples R China 4.Univ Chinese Acad Sci, Coll Earth & Planetary Sci, Beijing 100049, Peoples R China 5.Univ Tokyo, Geochem Res Ctr, Grad Sch Sci, Tokyo 1130033, Japan 6.Univ Bayreuth, Bayer Geoinst, D-95440 Bayreuth, Germany 7.Tohoku Univ, Grad Sch Sci, Dept Earth Sci, Sendai 9808578, Japan 8.SOA, South China Sea Environm Monitoring Ctr, Guangzhou 510300, Peoples R China 9.Tohoku Univ, Ctr North Asian Studies, Sendai 9808576, Japan |
| 推荐引用方式 GB/T 7714 | Huang, Yongsheng,Okumura, Satoshi,Matsumoto, Kazuhisa,et al. Experimental constraints on serpentinite carbonation in the presence of a H2O-CO2-NaCl fluid[J]. CONTRIBUTIONS TO MINERALOGY AND PETROLOGY,2024,179(11):26. |
| APA | Huang, Yongsheng.,Okumura, Satoshi.,Matsumoto, Kazuhisa.,Takahashi, Naoko.,Tang, Hong.,...&Li, Yuan.(2024).Experimental constraints on serpentinite carbonation in the presence of a H2O-CO2-NaCl fluid.CONTRIBUTIONS TO MINERALOGY AND PETROLOGY,179(11),26. |
| MLA | Huang, Yongsheng,et al."Experimental constraints on serpentinite carbonation in the presence of a H2O-CO2-NaCl fluid".CONTRIBUTIONS TO MINERALOGY AND PETROLOGY 179.11(2024):26. |
入库方式： OAI收割
来源：广州地球化学研究所
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