气候变化领域集成服务门户(CCPortal): Arc-Type Magmatism Due to Continental-Edge Plowing Through Ancient Subduction-Enriched Mantle

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DOI	10.1029/2020GL087484
	Arc-Type Magmatism Due to Continental-Edge Plowing Through Ancient Subduction-Enriched Mantle
	van Hinsbergen D.J.J.; Spakman W.; de Boorder H.; van Dongen M.; Jowitt S.M.; Mason P.R.D.
发表日期	2020
ISSN	0094-8276
卷号	47 期号:9
英文摘要	The puzzling <7 Ma old “postsubduction” arc magmatism of New Guinea contains geochemical subduction-type signatures yet did not occur above an active subduction zone. Here we show that these arc magmas formed at the North Australian continental lithospheric edge when it plowed northward through mantle above the detached Arafura slab remnant. This mantle preserved its subduction signature and the edge plowing process generated new melts that ascended via an active transform fault. Arafura slab subduction occurred at an intraoceanic subduction zone that ended ~30–25 Ma ago, when the Australian continental edge was still ~1,000 km to the south. Our absolute plate tectonic reconstruction of continental-edge plowing suggests that ancient mantle wedges remain semistationary in the upper mantle and can preserve their geochemical signature for tens of Ma, explaining previously enigmatic “postsubduction” arc magmatism. ©2020. The Authors.
英文关键词	Transform faults; Arc magmatism; Enriched mantle; Geochemical signatures; Lithospheric; Magmatisms; Mantle wedge; Subduction zones; Upper mantle; Geochemistry; lithosphere; reconstruction; slab; subduction zone; tectonic reconstruction; upper mantle; Australia; New Guinea
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/170379
作者单位	Department of Earth Sciences, Utrecht University, Utrecht, Netherlands; School of Earth, Atmosphere and Environment, Monash University, Clayton, Vic 3800,Australia, and Ministry of Infrastructure and Water Management, 2500 EX, The Hague, the, Netherlands; Department of Geoscience, University of Nevada, Las Vegas, Las Vegas, NV, United States
推荐引用方式 GB/T 7714	van Hinsbergen D.J.J.,Spakman W.,de Boorder H.,et al. Arc-Type Magmatism Due to Continental-Edge Plowing Through Ancient Subduction-Enriched Mantle[J],2020,47(9).
APA	van Hinsbergen D.J.J.,Spakman W.,de Boorder H.,van Dongen M.,Jowitt S.M.,&Mason P.R.D..(2020).Arc-Type Magmatism Due to Continental-Edge Plowing Through Ancient Subduction-Enriched Mantle.Geophysical Research Letters,47(9).
MLA	van Hinsbergen D.J.J.,et al."Arc-Type Magmatism Due to Continental-Edge Plowing Through Ancient Subduction-Enriched Mantle".Geophysical Research Letters 47.9(2020).