| DOI: | 10.1002/2015GL063633
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| 论文题名: | Deep recycling of oceanic asthenosphere material during subduction |
| 作者: | Liu L.; Zhou Q.
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| 刊名: | Geophysical Research Letters
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| ISSN: | 0094-8822
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| EISSN: | 1944-8553
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| 出版年: | 2015
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| 卷: | 42, 期:7 | | 起始页码: | 2204
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| 结束页码: | 2211
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| 语种: | 英语
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| 英文关键词: | flat slab subduction
; intraplate volcanism
; oceanic asthenosphere
; subduction entrainment
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| Scopus关键词: | Anisotropy
; Buoyancy
; Downward continuation
; Flat-slab subductions
; Geodynamic models
; High resolution
; Intraplate volcanism
; Oceanic asthenosphere
; Seismic anisotropy
; Temporal evolution
; Recycling
; asthenosphere
; buoyancy
; entrainment
; geodynamics
; intraplate process
; mantle
; plate tectonics
; seismic anisotropy
; subduction
; volcanism
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| 英文摘要: | Uncertainties in the origin and composition of oceanic asthenosphere lead to different views on its temporal evolution upon subduction. We investigate the evolution of asthenosphere material during subduction using high-resolution geodynamic models. In contrast to some earlier models suggesting that limited amount of asthenosphere material can be entrained during subduction, we find that much of the subslab mantle (>100 km thick) could recycle into the deep mantle following the slab, even if this mantle layer remains buoyant and less viscous during entrainment. Our results support the hypothesis that observed trench-parallel subslab seismic anisotropy is a downward continuation of the anisotropic asthenosphere. The entrainment of sometimes buoyant asthenosphere material provides a new mechanism for reducing slab dip angle which is consistent the shallower Pacific slab underneath Japan than that farther south. Episodic release of entrained buoyant materials during subduction can also explain enigmatic intraplate volcanism, such as the Changbaishan volcano in Northeast China. ©2015. American Geophysical Union. All Rights Reserved. |
| URL: | https://www.scopus.com/inward/record.uri?eid=2-s2.0-84928699462&doi=10.1002%2f2015GL063633&partnerID=40&md5=9e2455b72793c5e78b42e51f62f936b8
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| Citation statistics: |
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| 资源类型: | 期刊论文
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| 标识符: | http://119.78.100.158/handle/2HF3EXSE/8438
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| Appears in Collections: | 科学计划与规划
气候变化与战略
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作者单位: | Department of Geology, University of Illinois at Urbana-Champaign, Urbana, IL, United States
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| Recommended Citation: | |
Liu L.,Zhou Q.. Deep recycling of oceanic asthenosphere material during subduction[J]. Geophysical Research Letters,2015-01-01,42(7).
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