globalchange  > 气候变化与战略
DOI: 10.1073/pnas.2011064117
论文题名:
Crustal fingering facilitates free-gas methane migration through the hydrate stability zone
作者: Fu X.; Jimenez-Martinez J.; Nguyen T.P.; William Carey J.; Viswanathan H.; Cueto-Felgueroso L.; Juanes R.
刊名: Proceedings of the National Academy of Sciences of the United States of America
ISSN: 0027-8424
出版年: 2020
卷: 117, 期:50
起始页码: 31660
结束页码: 31664
语种: 英语
英文关键词: Methane hydrate ; Microfluidics ; Pattern formation ; Phase-Field method
英文摘要: Widespread seafloor methane venting has been reported in many regions of the world oceans in the past decade. Identifying and quantifying where and how much methane is being released into the ocean remains a major challenge and a critical gap in assessing the global carbon budget and predicting future climate [C. Ruppel, J. D. Kessler. Rev. Geophys. 55, 126-168 (2017)]. Methane hydrate (CH4 · 5.75H2O) is an ice-like solid that forms from methane-water mixture under elevated-pressure and low-temperature conditions typical of the deep marine settings (>600-m depth), often referred to as the hydrate stability zone (HSZ). Wide-ranging field evidence indicates that methane seepage often coexists with hydrate-bearing sediments within the HSZ, suggesting that hydrate formation may play an important role during the gas-migration process. At a depth that is too shallow for hydrate formation, existing theories suggest that gas migration occurs via capillary invasion and/or initiation and propagation of fractures (Fig. 1). Within the HSZ, however, a theoretical mechanism that addresses the way in which hydrate formation participates in the gas-percolation process is missing. Here, we study, experimentally and computationally, the mechanics of gas percolation under hydrate-forming conditions. We uncover a phenomenon-crustal fingering-and demonstrate how it may control methane-gas migration in ocean sediments within the HSZ. © 2020 National Academy of Sciences. All rights reserved.
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被引频次[WOS]:23   [查看WOS记录]     [查看WOS中相关记录]
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/163902
Appears in Collections:气候变化与战略

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作者单位: Fu, X., Department of Earth and Planetary Science, University of California, Berkeley, CA 94670, United States, Department of Mechanical and Civil Engineering, California Institute of Technology, Pasadena, CA 91125, United States; Jimenez-Martinez, J., Department of Water Resources and Drinking Water, Swiss Federal Institute of Aquatic Science and Technology, Dubendorf, 8600, Switzerland, Earth and Environmental Sciences Division, Los Alamos National Laboratory, Los Alamos, NM 87545, United States, Department of Civil, Environmental and Geomatic Engineering, Swiss Federal Institute of Technology, Zurich, 8093, Switzerland; Nguyen, T.P., Earth and Environmental Sciences Division, Los Alamos National Laboratory, Los Alamos, NM 87545, United States; William Carey, J., Earth and Environmental Sciences Division, Los Alamos National Laboratory, Los Alamos, NM 87545, United States; Viswanathan, H., Earth and Environmental Sciences Division, Los Alamos National Laboratory, Los Alamos, NM 87545, United States; Cueto-Felgueroso, L., Department of Hydraulics, Energy and Environment, Technical University of Madrid, Madrid, 28040, Spain; Juanes, R., Department of Civil and Environmental Engineering, Massachusetts Institute of Technology, Cambridge, MA 02139, United States, Department of Earth, Atmospheric and Planetary Sciences, Massachusetts Institute of Technology, Cambridge, MA 02139, United States

Recommended Citation:
Fu X.,Jimenez-Martinez J.,Nguyen T.P.,et al. Crustal fingering facilitates free-gas methane migration through the hydrate stability zone[J]. Proceedings of the National Academy of Sciences of the United States of America,2020-01-01,117(50)
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