气候变化领域集成服务门户(CCPortal): The Lithospheric Architecture of Australia From Seismic Receiver Functions

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DOI	10.1029/2020JB020999
	The Lithospheric Architecture of Australia From Seismic Receiver Functions
	Birkey A.; Ford H.A.; Dabney P.; Goldhagen G.
发表日期	2021
ISSN	21699313
卷号	126 期号:4
英文摘要	In the past decade, mounting evidence has pointed to complex, layered structure within and at the base of the mantle lithosphere of tectonically quiescent continental interiors. Sometimes referred to as negative velocity gradients or midlithospheric discontinuities (MLDs), the origin of intralithospheric layering has prompted considerable discussion, particularly as to how they may result from continent formation and/or evolution. Previous Sp receiver function analysis in Australia (Ford et al., 2010, https://doi.org/10.1016/j.epsl.2010.10.007) found evidence for complex lithospheric layering beneath permanent stations located within the North, South, and West Australian Cratons and characterized these as MLDs. This study provides an update to the original study by Ford et al. (2010, https://doi.org/10.1016/j.epsl.2010.10.007). Sp receiver function results are presented for 34 permanent, broadband stations. We observe the lithosphere–asthenosphere boundary (LAB) on the eastern margin of the continent, at depths of 75–85 km. The cratonic core of Australia has discontinuities within the lithosphere, with no observable LAB. On the western margin of the continent, we observe several stations with an ambiguous phase that may correspond to an MLD or the LAB. We also observe multiple negative phases at most stations, suggesting a complex and heterogeneous lithosphere. Australian MLDs are likely linked to the presence of hydrous minerals in the midlithosphere and may result from ancient processes such as subduction, plume interaction, or melt infiltration from the paleo-LAB. © 2021. American Geophysical Union. All Rights Reserved.
英文关键词	Australia; cratons; receiver function
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/187241
作者单位	Department of Earth and Planetary Sciences, University of California – Riverside, Riverside, CA, United States; Department of Geosciences, Princeton University, Princeton, NJ, United States
推荐引用方式 GB/T 7714	Birkey A.,Ford H.A.,Dabney P.,et al. The Lithospheric Architecture of Australia From Seismic Receiver Functions[J],2021,126(4).
APA	Birkey A.,Ford H.A.,Dabney P.,&Goldhagen G..(2021).The Lithospheric Architecture of Australia From Seismic Receiver Functions.Journal of Geophysical Research: Solid Earth,126(4).
MLA	Birkey A.,et al."The Lithospheric Architecture of Australia From Seismic Receiver Functions".Journal of Geophysical Research: Solid Earth 126.4(2021).