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DOI | 10.1073/pnas.1620644114 |
Dehydrogenation of goethite in Earth's deep lower mantle | |
Hu, Qingyang1,2,3; Kim, Duck Young1; Liu, Jin2; Meng, Yue4; Yang, Liuxiang1,3; Zhang, Dongzhou5; Mao, Wendy L.2; Mao, Ho-Kwang1,3 | |
2017-02-14 | |
发表期刊 | PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA |
ISSN | 0027-8424 |
出版年 | 2017 |
卷号 | 114期号:7页码:1498-1501 |
文章类型 | Article |
语种 | 英语 |
国家 | Peoples R China; USA |
英文摘要 | The cycling of hydrogen influences the structure, composition, and stratification of Earth's interior. Our recent discovery of pyrite-structured iron peroxide (designated as the P phase) and the formation of the P phase from dehydrogenation of goethite FeO2H implies the separation of the oxygen and hydrogen cycles in the deep lower mantle beneath 1,800 km. Here we further characterize the residual hydrogen, x, in the P-phase FeO(2)Hx. Using a combination of theoretical simulations and high-pressure-temperature experiments, we calibrated the x dependence of molar volume of the P phase. Within the current range of experimental conditions, we observed a compositional range of P phase of 0.39 < x < 0.81, corresponding to 19-61% dehydrogenation. Increasing temperature and heating time will help release hydrogen and lower x, suggesting that dehydrogenation could be approaching completion at the high-temperature conditions of the lower mantle over extended geological time. Our observations indicate a fundamental change in the mode of hydrogen release from dehydration in the upper mantle to dehydrogenation in the deep lower mantle, thus differentiating the deep hydrogen and hydrous cycles. |
英文关键词 | dehydrogenation high pressure P phase FeO2 FeO2H |
领域 | 地球科学 ; 气候变化 ; 资源环境 |
收录类别 | SCI-E |
WOS记录号 | WOS:000393989300046 |
WOS关键词 | EQUATION-OF-STATE ; GENERALIZED GRADIENT APPROXIMATION ; WATER TRANSPORT ; HYDROUS PHASE ; HIGH-PRESSURE ; DELTA-ALOOH ; STABILITY ; FEOOH ; FIELD ; OXIDE |
WOS类目 | Multidisciplinary Sciences |
WOS研究方向 | Science & Technology - Other Topics |
URL | 查看原文 |
引用统计 | |
文献类型 | 期刊论文 |
条目标识符 | http://119.78.100.173/C666/handle/2XK7JSWQ/204850 |
专题 | 地球科学 资源环境科学 气候变化 |
作者单位 | 1.Ctr High Pressure Sci & Technol Adv Res, Shanghai 201203, Peoples R China; 2.Stanford Univ, Dept Geol Sci, Stanford, CA 94305 USA; 3.Carnegie Inst, Geophys Lab, Washington, DC 20015 USA; 4.Carnegie Inst, Geophys Lab, High Pressure Collaborat Access Team, Argonne, IL 60439 USA; 5.Univ Hawaii, Sch Ocean & Earth Sci & Technol, Hawaii Inst Geophys & Planetol, Honolulu, HI 96822 USA |
推荐引用方式 GB/T 7714 | Hu, Qingyang,Kim, Duck Young,Liu, Jin,et al. Dehydrogenation of goethite in Earth's deep lower mantle[J]. PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA,2017,114(7):1498-1501. |
APA | Hu, Qingyang.,Kim, Duck Young.,Liu, Jin.,Meng, Yue.,Yang, Liuxiang.,...&Mao, Ho-Kwang.(2017).Dehydrogenation of goethite in Earth's deep lower mantle.PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA,114(7),1498-1501. |
MLA | Hu, Qingyang,et al."Dehydrogenation of goethite in Earth's deep lower mantle".PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA 114.7(2017):1498-1501. |
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