DOI: 10.1002/2016GL069452
论文题名: Structure II gas hydrates found below the bottom-simulating reflector
作者: Paganoni M. ; Cartwright J.A. ; Foschi M. ; Shipp R.C. ; Van Rensbergen P.
刊名: Geophysical Research Letters
ISSN: 0094-8984
EISSN: 1944-8715
出版年: 2016
卷: 43, 期: 11 起始页码: 5696
结束页码: 5706
语种: 英语
英文关键词: BSR
; chemical fractionation
; gas hydrates
; hydrate stability
; hydrocarbon migration
; thermogenic gas
Scopus关键词: Carbon
; Chemical stability
; Gases
; Hydration
; Iodine
; Organic carbon
; Reflection
; Seismology
; Stability
; Well logging
; Bottom simulating reflector
; Chemical Fractionation
; Gas hydrate saturations
; Geological setting
; Hydrate stabilities
; Hydrocarbon migration
; Organic carbon cycle
; Thermogenic gas
; Gas hydrates
英文摘要: Gas hydrates are a major component in the organic carbon cycle. Their stability is controlled by temperature, pressure, water chemistry, and gas composition. The bottom-simulating reflector (BSR) is the primary seismic indicator of the base of hydrate stability in continental margins. Here we use seismic, well log, and core data from the convergent margin offshore NW Borneo to demonstrate that the BSR does not always represent the base of hydrate stability and can instead approximate the boundary between structure I hydrates above and structure II hydrates below. At this location, gas hydrate saturation below the BSR is higher than above and a process of chemical fractionation of the migrating free gas is responsible for the structure I-II transition. This research shows that in geological settings dominated by thermogenic gas migration, the hydrate stability zone may extend much deeper than suggested by the BSR. ©2016. American Geophysical Union. All Rights Reserved. URL: https://www.scopus.com/inward/record.uri?eid=2-s2.0-84977176804&doi=10.1002%2f2016GL069452&partnerID=40&md5=7be09472673c4a7524de6b5d8e948504
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/9947
Appears in Collections: 科学计划与规划 气候变化与战略
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作者单位: Department of Earth Sciences, University of Oxford, Oxford, United Kingdom
Recommended Citation:
Paganoni M.,Cartwright J.A.,Foschi M.,et al. Structure II gas hydrates found below the bottom-simulating reflector[J]. Geophysical Research Letters,2016-01-01,43(11).