气候变化领域集成服务门户(CCPortal): Constraining the Age and Evolution of the Tuaheni Landslide Complex; Hikurangi Margin; New Zealand; Using Pore-Water Geochemistry and Numerical Modeling

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DOI	10.1029/2020GL087243
	Constraining the Age and Evolution of the Tuaheni Landslide Complex; Hikurangi Margin; New Zealand; Using Pore-Water Geochemistry and Numerical Modeling
	Luo M.; Torres M.E.; Kasten S.; Mountjoy J.J.
发表日期	2020
ISSN	0094-8276
卷号	47 期号:11
英文摘要	The Tuaheni Landslide Complex (TLC) on the Hikurangi Margin is subject to reactivation, yet the timing of slide emplacement remains unknown. Here we modeled pore-water data collected from the TLC during the International Ocean Discovery Program (IODP) Expedition 372 in 2017/2018 using a transient-state reaction-transport modeling approach. Our simulations reveal that the TLC was formed by two separate depositional events and that the most recent one occurred 12.5 ± 2.5 ka as a coherent ~40 m sediment block that carried its initial pore-water signature. In addition, we show that the rapid burial of pore-water SO42− in the pre-slide sediments consumed an additional ~5.6 × 109 mole of CH4 over the entire Tuaheni South following the most recent depositional event. These findings provide significant insights into the nature and timing of the TLC and highlight the role of slope failure on subsurface methane cycling on millennial timescales. ©2020. American Geophysical Union. All Rights Reserved.
英文关键词	Deposition; Landslides; Depositional event; New zealand; Pore water geochemistry; Pore waters; Slope failure; Time-scales; Transient state; Water; age determination; emplacement; geochemistry; landscape evolution; landslide; numerical model; Ocean Drilling Program; porewater; sediment transport; slope failure; Hikurangi Margin; 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/170301
作者单位	Shanghai Engineering Research Center of Hadal Science and Technology, College of Marine Sciences, Shanghai Ocean University, Shanghai, China; Laboratory for Marine Geology, Qingdao National Laboratory for Marine Science and Technology, Qingdao, China; College of Earth, Ocean, and Atmospheric Science, Oregon State University, Corvallis, OR, United States; Alfred Wegener Institute Helmholtz Centre for Polar and Marine Research, Bremerhaven, Germany; MARUM-Center for Marine Environmental Sciences, University of Bremen, Bremen, Germany; Faculty of Geosciences, University of Bremen, Bremen, Germany; National Institute of Water and Atmospheric Research, Wellington, New Zealand
推荐引用方式 GB/T 7714	Luo M.,Torres M.E.,Kasten S.,et al. Constraining the Age and Evolution of the Tuaheni Landslide Complex; Hikurangi Margin; New Zealand; Using Pore-Water Geochemistry and Numerical Modeling[J],2020,47(11).
APA	Luo M.,Torres M.E.,Kasten S.,&Mountjoy J.J..(2020).Constraining the Age and Evolution of the Tuaheni Landslide Complex; Hikurangi Margin; New Zealand; Using Pore-Water Geochemistry and Numerical Modeling.Geophysical Research Letters,47(11).
MLA	Luo M.,et al."Constraining the Age and Evolution of the Tuaheni Landslide Complex; Hikurangi Margin; New Zealand; Using Pore-Water Geochemistry and Numerical Modeling".Geophysical Research Letters 47.11(2020).