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  4. 中国科学院地球与行星物理重点实验室
The foundering of stagnant slabs bearing oceanic plateau into the lower mantle

文献类型：期刊论文

作者Liu, Xi1; Li, Juan2,4; Zhang, Zhigang2,4; Sun, Weidong1,3,4
刊名DEEP-SEA RESEARCH PART I-OCEANOGRAPHIC RESEARCH PAPERS
出版日期2023-04-01
卷号194页码:6
关键词Plume head Oceanic plateau Slab foundering Transition zone Density barrier
ISSN号0967-0637
DOI10.1016/j.dsr.2023.103964
英文摘要The oceanic plateau is proposed to be produced by the plume head. Seeking the missing plume head associated with seamount chains is an important task to evaluate the plume theory. While the subduction initiation and process of the oceanic plateau is debatable, recent seismic studies suggest that the Hawaiian-Emperor oceanic plateau has been subducted into the lower mantle. The sinking rate is higher than previously estimated and even higher than that of the normal slab. It is intriguing, as the phase transitions would cause a density barrier for the basaltic materials from-660-km to-720-km depths, and slow down the subduction of the slabs, especially for the oceanic plateau with a thickened basaltic crust. Here, we perform geodynamic numerical experiments to investigate the foundering process of flat stagnant slabs from the transition zone into the lower mantle. We compare models of both the normal slab and slabs bearing oceanic plateau and suggest that a basaltic underplate layer beneath the peridotite mantle lithosphere in the oceanic plateau can lead to a higher foundering rate. The underplated oceanic plateau can reach-1000-km depth in-50 Myrs. These models provide a new perspective in understanding the fate of subducted oceanic plateau, suggesting that missing plume heads might be found in the lower mantle.
WOS关键词SUBDUCTION ; PACIFIC ; DYNAMICS ; PROVINCE ; CHINA
资助项目Laoshan Laboratory[2022LSKJ050201-1] ; Laoshan Laboratory[2022LSKJ050201-4] ; Taishan Scholar Program of Shandong[ts201712075] ; Key Research Program of the Institute of Geology & Geophysics, CAS[IGGCAS-201904] ; Open Research Program of the Institute of Geology & Geophysics, CAS[DQXX2021-02] ; Oceanographic Data Center, IOCAS
WOS研究方向Oceanography
语种英语
WOS记录号WOS:000995854000001
出版者PERGAMON-ELSEVIER SCIENCE LTD
资助机构Laoshan Laboratory ; Laoshan Laboratory ; Taishan Scholar Program of Shandong ; Taishan Scholar Program of Shandong ; Key Research Program of the Institute of Geology & Geophysics, CAS ; Key Research Program of the Institute of Geology & Geophysics, CAS ; Open Research Program of the Institute of Geology & Geophysics, CAS ; Open Research Program of the Institute of Geology & Geophysics, CAS ; Oceanographic Data Center, IOCAS ; Oceanographic Data Center, IOCAS ; Laoshan Laboratory ; Laoshan Laboratory ; Taishan Scholar Program of Shandong ; Taishan Scholar Program of Shandong ; Key Research Program of the Institute of Geology & Geophysics, CAS ; Key Research Program of the Institute of Geology & Geophysics, CAS ; Open Research Program of the Institute of Geology & Geophysics, CAS ; Open Research Program of the Institute of Geology & Geophysics, CAS ; Oceanographic Data Center, IOCAS ; Oceanographic Data Center, IOCAS ; Laoshan Laboratory ; Laoshan Laboratory ; Taishan Scholar Program of Shandong ; Taishan Scholar Program of Shandong ; Key Research Program of the Institute of Geology & Geophysics, CAS ; Key Research Program of the Institute of Geology & Geophysics, CAS ; Open Research Program of the Institute of Geology & Geophysics, CAS ; Open Research Program of the Institute of Geology & Geophysics, CAS ; Oceanographic Data Center, IOCAS ; Oceanographic Data Center, IOCAS ; Laoshan Laboratory ; Laoshan Laboratory ; Taishan Scholar Program of Shandong ; Taishan Scholar Program of Shandong ; Key Research Program of the Institute of Geology & Geophysics, CAS ; Key Research Program of the Institute of Geology & Geophysics, CAS ; Open Research Program of the Institute of Geology & Geophysics, CAS ; Open Research Program of the Institute of Geology & Geophysics, CAS ; Oceanographic Data Center, IOCAS ; Oceanographic Data Center, IOCAS
源URL[http://ir.iggcas.ac.cn/handle/132A11/110939]  
专题地质与地球物理研究所_中国科学院地球与行星物理重点实验室
通讯作者Liu, Xi; Sun, Weidong
作者单位1.Chinese Acad Sci, Inst Oceanol, Ctr Deep Sea Res, Ctr Ocean Mega Sci, Qingdao 266071, Peoples R China
2.Chinese Acad Sci, Inst Geol & Geophys, Key Lab Earth & Planetary Phys, Beijing 100029, Peoples R China
3.Deep Sea Multidisciplinary Res Ctr, Laoshan Lab, Qingdao 266237, Peoples R China
4.Univ Chinese Acad Sci, Beijing 100049, Peoples R China
推荐引用方式
GB/T 7714		 Liu, Xi,Li, Juan,Zhang, Zhigang,et al. The foundering of stagnant slabs bearing oceanic plateau into the lower mantle[J]. DEEP-SEA RESEARCH PART I-OCEANOGRAPHIC RESEARCH PAPERS,2023,194:6.
APA Liu, Xi,Li, Juan,Zhang, Zhigang,&Sun, Weidong.(2023).The foundering of stagnant slabs bearing oceanic plateau into the lower mantle.DEEP-SEA RESEARCH PART I-OCEANOGRAPHIC RESEARCH PAPERS,194,6.
MLA Liu, Xi,et al."The foundering of stagnant slabs bearing oceanic plateau into the lower mantle".DEEP-SEA RESEARCH PART I-OCEANOGRAPHIC RESEARCH PAPERS 194(2023):6.

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来源：地质与地球物理研究所

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