气候变化领域集成服务门户(CCPortal): What Controls Effective Elastic Thickness of the Lithosphere in the Pacific Ocean?

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DOI	10.1029/2020JB021074
	What Controls Effective Elastic Thickness of the Lithosphere in the Pacific Ocean?
	Lu Z.; Audet P.; Li C.-F.; Zhu S.; Wu Z.
发表日期	2021
ISSN	21699313
卷号	126 期号:3
英文摘要	The effective elastic thickness ((Formula presented.)) of the lithosphere is a proxy for mechanical strength and can be used to constrain lithospheric rheology and understand how surface deformation relates to deep Earth processes. Here, we map (Formula presented.) variations over the Pacific Ocean from the inversion of the admittance between free-air gravity anomaly and bathymetry data calculated using a continuous wavelet transform, taking both surface and subsurface loads into account. The Pacific lithosphere show (Formula presented.) ranging between 0 and 80 km with a mean of 13.5 km and a standard deviation of 12.3 km. We find that (Formula presented.) is generally poorly correlated with plate loading age, crustal age, heat flow and Curie point depth, except for relatively young (<60 Ma) and warm lithospheres. Most oceanic plateaus and seamounts show (Formula presented.) km, with the lowest values (<5 km) around active spreading centers. The highest (Formula presented.) estimates (>30 km) are found along subduction zones and around the Hawaiian-Emperor Seamount Chain (HESC). Taken together, these results support a temperature control on (Formula presented.) for small loads and warm lithosphere through steady-state creep processes, but strain hardening operating at large plastic strain and low temperature could explain high (Formula presented.) associated with large-amplitude and long-wavelength loads (subduction zones and the HESC) and should be incorporated in yield strength models of oceanic (Formula presented.). © 2021. American Geophysical Union. All Rights Reserved.
英文关键词	effective elastic thickness; geothermal state; loading types; Pacific Ocean; strain hardening mechanisms; wavelet analysis
语种	英语
来源期刊	Journal of Geophysical Research: Solid Earth
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/187295
作者单位	Institute of Marine Geology and Resources, Zhejiang University, Zhoushan, China; Department of Earth and Environmental Sciences, University of Ottawa, Ottawa, ON, Canada; Laboratory for Marine Mineral Resources, Qingdao National Laboratory for Marine Science and Technology, Qingdao, China; Key Laboratory of Submarine Geosciences, State Oceanic Administration and Second Institute of Oceanography, Ministry of Natural Resources, Hangzhou, China
推荐引用方式 GB/T 7714	Lu Z.,Audet P.,Li C.-F.,et al. What Controls Effective Elastic Thickness of the Lithosphere in the Pacific Ocean?[J],2021,126(3).
APA	Lu Z.,Audet P.,Li C.-F.,Zhu S.,&Wu Z..(2021).What Controls Effective Elastic Thickness of the Lithosphere in the Pacific Ocean?.Journal of Geophysical Research: Solid Earth,126(3).
MLA	Lu Z.,et al."What Controls Effective Elastic Thickness of the Lithosphere in the Pacific Ocean?".Journal of Geophysical Research: Solid Earth 126.3(2021).