Oceanic plateau of the Hawaiian mantle plume head subducted to the uppermost lower mantle

doi:10.1126/science.abd0312

GSTDTAP > 气候变化

DOI	10.1126/science.abd0312
	Oceanic plateau of the Hawaiian mantle plume head subducted to the uppermost lower mantle
	Songqiao Shawn Wei; Peter M. Shearer; Carolina Lithgow-Bertelloni; Lars Stixrude; Dongdong Tian
	2020-11-20
发表期刊	Science
出版年	2020
英文摘要	Volcanic island and seamount chains form from deep-seated plumes of hot material upwelling through the mantle. The most famous of these is the Hawaiian-Emperor seamount chain. However, a large volcanic structure associated with a plume head that should precede the chain has long been missing. Wei et al. finally identified the likely location of this structure in the mantle under eastern Russia. The structure was likely subducted 20 million to 30 million years ago, and the location helps constrain several geodynamic processes. Science , this issue p. [983][1] The Hawaiian-Emperor seamount chain that includes the Hawaiian volcanoes was created by the Hawaiian mantle plume. Although the mantle plume hypothesis predicts an oceanic plateau produced by massive decompression melting during the initiation stage of the Hawaiian hot spot, the fate of this plateau is unclear. We discovered a megameter-scale portion of thickened oceanic crust in the uppermost lower mantle west of the Sea of Okhotsk by stacking seismic waveforms of SS precursors. We propose that this thick crust represents a major part of the oceanic plateau that was created by the Hawaiian plume head ~100 million years ago and subducted 20 million to 30 million years ago. Our discovery provides temporal and spatial clues of the early history of the Hawaiian plume for future plate reconstructions. [1]: /lookup/doi/10.1126/science.abd0312
领域	气候变化 ; 资源环境
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文献类型	期刊论文
条目标识符	http://119.78.100.173/C666/handle/2XK7JSWQ/304408
专题	气候变化资源环境科学
推荐引用方式 GB/T 7714	Songqiao Shawn Wei,Peter M. Shearer,Carolina Lithgow-Bertelloni,et al. Oceanic plateau of the Hawaiian mantle plume head subducted to the uppermost lower mantle[J]. Science,2020.
APA	Songqiao Shawn Wei,Peter M. Shearer,Carolina Lithgow-Bertelloni,Lars Stixrude,&Dongdong Tian.(2020).Oceanic plateau of the Hawaiian mantle plume head subducted to the uppermost lower mantle.Science.
MLA	Songqiao Shawn Wei,et al."Oceanic plateau of the Hawaiian mantle plume head subducted to the uppermost lower mantle".Science (2020).