气候变化领域集成服务门户(CCPortal): Physical Properties and Gas Hydrate at a Near-Seafloor Thrust Fault; Hikurangi Margin; New Zealand

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DOI	10.1029/2020GL088474
	Physical Properties and Gas Hydrate at a Near-Seafloor Thrust Fault; Hikurangi Margin; New Zealand
	Cook A.E.; Paganoni M.; Clennell M.B.; McNamara D.D.; Nole M.; Wang X.; Han S.; Bell R.E.; Solomon E.A.; Saffer D.M.; Barnes P.M.; Pecher I.A.; Wallace L.M.; LeVay L.J.; Petronotis K.E.
发表日期	2020
ISSN	0094-8276
卷号	47 期号:16
英文摘要	The Pāpaku Fault Zone, drilled at International Ocean Discovery Program (IODP) Site U1518, is an active splay fault in the frontal accretionary wedge of the Hikurangi Margin. In logging-while-drilling data, the 33-m-thick fault zone exhibits mixed modes of deformation associated with a trend of downward decreasing density, P-wave velocity, and resistivity. Methane hydrate is observed from ~30 to 585 m below seafloor (mbsf), including within and surrounding the fault zone. Hydrate accumulations are vertically discontinuous and occur throughout the entire logged section at low to moderate saturation in silty and sandy centimeter-thick layers. We argue that the hydrate distribution implies that the methane is not sourced from fluid flow along the fault but instead by local diffusion. This, combined with geophysical observations and geochemical measurements from Site U1518, suggests that the fault is not a focused migration pathway for deeply sourced fluids and that the near-seafloor Pāpaku Fault Zone has little to no active fluid flow. ©2020. American Geophysical Union. All Rights Reserved.
英文关键词	Diffusion in liquids; Faulting; Flow of fluids; Hydration; Infill drilling; Logging while drilling; Methane; Seismic waves; Wave propagation; Accretionary wedge; Geochemical measurements; Geophysical observations; Hydrate accumulations; Hydrate distribution; Methane hydrates; Migration pathway; P-wave velocity; Gas hydrates; accretionary prism; fault zone; fluid flow; gas hydrate; methane; P-wave; physical property; saturation; seafloor; thrust fault; Hikurangi Margin; New Zealand; Pacific Ocean
语种	英语
来源期刊	Geophysical Research Letters
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/169915
作者单位	School of Earth Sciences, The Ohio State University, Columbus, OH, United States; Department of Earth Sciences, University of Oxford, Oxford, United Kingdom; Shell International Global Solutions, Rijswijk, Netherlands; CSIRO, Kensington, WA, Australia; Earth, Ocean and Ecological Sciences, University of Liverpool, Liverpool, United Kingdom; Center for Energy and Earth Systems, Sandia National Laboratories, Albuquerque, NM, United States; Institute of Oceanography, Chinese Academy of Sciences, Qingdao, China; Institute for Geophysics, University of Texas-Austin, Austin, TX, United States; Basins Research Group, Imperial College London, London, United Kingdom; School of Oceanography, University of Washington, Seattle, WA, United States; National Institute of Water and Atmospheric Research (NIWA), Wellington, New Zealand; School of Environmental and Marine Sciences, University of Auckland, Auckland, New Zealand; GNS Science, Lower Hutt, New Zealand; International Ocean Discovery Program, Texas A&M University...
推荐引用方式 GB/T 7714	Cook A.E.,Paganoni M.,Clennell M.B.,et al. Physical Properties and Gas Hydrate at a Near-Seafloor Thrust Fault; Hikurangi Margin; New Zealand[J],2020,47(16).
APA	Cook A.E..,Paganoni M..,Clennell M.B..,McNamara D.D..,Nole M..,...&Petronotis K.E..(2020).Physical Properties and Gas Hydrate at a Near-Seafloor Thrust Fault; Hikurangi Margin; New Zealand.Geophysical Research Letters,47(16).
MLA	Cook A.E.,et al."Physical Properties and Gas Hydrate at a Near-Seafloor Thrust Fault; Hikurangi Margin; New Zealand".Geophysical Research Letters 47.16(2020).