DOI: 10.1002/2014GL062135
论文题名: Pore size controls on the base of the methane hydrate stability zone in the Kumano Basin, offshore Japan
作者: Daigle H. ; Dugan B.
刊名: Geophysical Research Letters
ISSN: 0094-9608
EISSN: 1944-9339
出版年: 2014
卷: 41, 期: 22 起始页码: 8021
结束页码: 8028
语种: 英语
英文关键词: bottom-simulating reflection
; IODP
; methane hydrate
; Nankai Trough
; NanTroSEIZE
Scopus关键词: Hydration
; Lithology
; Methane
; Pore size
; Seismology
; Submarine geology
; Thermoelectricity
; Bottom simulating reflection
; IODP
; Methane hydrates
; Nankai troughs
; NanTroSEIZE
; Gas hydrates
; capillarity
; gas hydrate
; hydration
; marine sediment
; methane
; porewater
; seismic data
; seismic reflection
; stabilization
; temperature profile
; Kumano Basin
; Nankai Trough
; Pacific Ocean
英文摘要: The base of the methane hydrate stability zone (MHSZ) in the Kumano Basin, offshore Japan, is marked by a bottom-simulating reflection (BSR) on seismic data. At Integrated Ocean Drilling Program Site C0002, which penetrates this BSR, the in situ temperature profile combined with bulk seawater methane equilibrium conditions suggest that the base of the MHSZ is 428 m below seafloor (bsf), which is 28 m deeper than the observed BSR (400 m bsf). We found that submicron pore sizes determined by mercury injection capillary pressure are sufficiently small to cause 64% of the observed uplift of the base of the MHSZ by the Gibbs-Thomson effect. This is the most thorough characterization of pore sizes within the MHSZ performed to date and illustrates the extent to which pore size can influence MHSZ thickness. Our results demonstrate the importance of considering lithology and pore structure when assessing methane hydrate stability conditions in marine sediments. © 2014. American Geophysical Union. All Rights Reserved. URL: https://www.scopus.com/inward/record.uri?eid=2-s2.0-84923375150&doi=10.1002%2f2014GL062135&partnerID=40&md5=6dc240460371cb69b4e7ae9f8af1ba2f
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/6872
Appears in Collections: 气候减缓与适应
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作者单位: Department of Petroleum and Geosystems Engineering, University of Texas at Austin, Austin, TX, United States
Recommended Citation:
Daigle H.,Dugan B.. Pore size controls on the base of the methane hydrate stability zone in the Kumano Basin, offshore Japan[J]. Geophysical Research Letters,2014-01-01,41(22).