DOI: 10.1002/2013GL058048
论文题名: Seabed fluid expulsion along the upper slope and outer shelf of the U.S. Atlantic continental margin
作者: Brothers D.S. ; Ruppel C. ; Kluesner J.W. ; Ten Brink U.S. ; Chaytor J.D. ; Hill J.C. ; Andrews B.D. ; Flores C.
刊名: Geophysical Research Letters
ISSN: 0094-10500
EISSN: 1944-10231
出版年: 2014
卷: 41, 期: 1 起始页码: 96
结束页码: 101
语种: 英语
英文关键词: attribute analysis
; fluid expulsion
; gas hydrate
; pockmark
; seismic stratigraphy
; submarine landslide
Scopus关键词: Attribute analysis
; Continental margin
; Gas hydrate stability zones
; Hydrate dissociation
; Multi-channel seismic
; pockmark
; Seismic stratigraphy
; Submarine landslides
; Fluidization
; Gases
; Hydration
; Sediments
; Slope stability
; Stratigraphy
; Submarine geology
; Gas hydrates
; climate effect
; continental margin
; dissolution
; fluid expulsion
; pockmark
; seafloor
; seismic reflection
; water depth
; United States
英文摘要: Identifying the spatial distribution of seabed fluid expulsion features is crucial for understanding the substrate plumbing system of any continental margin. A 1100 km stretch of the U.S. Atlantic margin contains more than 5000 pockmarks at water depths of 120 m (shelf edge) to 700 m (upper slope), mostly updip of the contemporary gas hydrate stability zone (GHSZ). Advanced attribute analyses of high-resolution multichannel seismic reflection data reveal gas-charged sediment and probable fluid chimneys beneath pockmark fields. A series of enhanced reflectors, inferred to represent hydrate-bearing sediments, occur within the GHSZ. Differential sediment loading at the shelf edge and warming-induced gas hydrate dissociation along the upper slope are the proposed mechanisms that led to transient changes in substrate pore fluid overpressure, vertical fluid/gas migration, and pockmark formation. Key Points Thousands of pockmarks discovered along the upper slope and outer shelf Evidence for fluidization and for the presence of hydrate-bearing sediments Upper slope gas hydrate dissociation may be linked to recent climatic changes ©2013. American Geophysical Union. All Rights Reserved. URL: https://www.scopus.com/inward/record.uri?eid=2-s2.0-84896739017&doi=10.1002%2f2013GL058048&partnerID=40&md5=d5a8abb551dc32fa438448e71f5f916e
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/7764
Appears in Collections: 气候减缓与适应
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作者单位: Woods Hole Coastal and Marine Science Center, U.S. Geological Survey, 384 Woods Hole Rd., Woods Hole, MA 02543, United States
Recommended Citation:
Brothers D.S.,Ruppel C.,Kluesner J.W.,et al. Seabed fluid expulsion along the upper slope and outer shelf of the U.S. Atlantic continental margin[J]. Geophysical Research Letters,2014-01-01,41(1).