DOI: 10.1002/2016GL071306
论文题名: Geophysical imaging of shallow degassing in a Yellowstone hydrothermal system
作者: Pasquet S. ; Holbrook W.S. ; Carr B.J. ; Sims K.W.W.
刊名: Geophysical Research Letters
ISSN: 0094-8354
EISSN: 1944-8085
出版年: 2016
卷: 43, 期: 23 起始页码: 12027
结束页码: 12035
语种: 英语
英文关键词: fluid flow path
; hydrothermal systems
; near-surface geophysics
; Poisson's ratio
; rock physics modeling
; shallow degassing
Scopus关键词: Acoustic wave velocity
; Degassing
; Flow of fluids
; Geophysics
; Groundwater
; Phase separation
; Poisson ratio
; Sensitivity analysis
; Shear waves
; Surface waves
; Wave propagation
; Compressional wave velocity
; Geophysical imaging
; Hydrothermal system
; Near-surface geophysics
; Porosity and saturation
; Rock physics model
; Shear wave velocity
; Surface-wave analysis
; Shear flow
英文摘要: The Yellowstone Plateau Volcanic Field, which hosts over 10,000 thermal features, is the world's largest active continental hydrothermal system, yet very little is known about the shallow “plumbing” system connecting hydrothermal reservoirs to surface features. Here we present the results of geophysical investigations of shallow hydrothermal degassing in Yellowstone. We measured electrical resistivity, compressional-wave velocity from refraction data, and shear wave velocity from surface-wave analysis to image shallow hydrothermal degassing to depths of 15–30 m. We find that resistivity helps identify fluid pathways and that Poisson's ratio shows good sensitivity to saturation variations, highlighting gas-saturated areas and the local water table. Porosity and saturation predicted from rock physics modeling provide critical insight to estimate the fluid phase separation depth and understand the structure of hydrothermal systems. Finally, our results show that Poisson's ratio can effectively discriminate gas- from water-saturated zones in hydrothermal systems. ©2016. American Geophysical Union. All Rights Reserved. URL: https://www.scopus.com/inward/record.uri?eid=2-s2.0-85006762282&doi=10.1002%2f2016GL071306&partnerID=40&md5=e80d9a15609d540ed2881ee5b0b5b4fe
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/9317
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 Geology and Geophysics, University of Wyoming, Laramie, WY, United States
Recommended Citation:
Pasquet S.,Holbrook W.S.,Carr B.J.,et al. Geophysical imaging of shallow degassing in a Yellowstone hydrothermal system[J]. Geophysical Research Letters,2016-01-01,43(23).