中国科学院机构知识库网格
Chinese Academy of Sciences Institutional Repositories Grid
首页 机构 成果 学者
  
  1. CAS IR Grid
  2. 海洋研究所
  3. 中国科学院海洋研究所
  4. 海洋地质与环境重点实验室
Remnants of shifting early Cenozoic Pacific lower mantle flow imaged beneath the Philippine Sea Plate

文献类型：期刊论文

作者Fan, Jianke3,4; Zhao, Dapeng2; Li, Cuilin3,4; Liu, Lijun1; Dong, Dongdong3,4
刊名NATURE GEOSCIENCE
出版日期2024-03-12
页码8
ISSN号1752-0894
DOI10.1038/s41561-024-01404-6
通讯作者Fan, Jianke(fanjianke@qdio.ac.cn) ; Li, Cuilin(cuilinli@qdio.ac.cn)
英文摘要Seismic anisotropy could provide vital information about the evolution and internal convection of the deep Earth interior. Although previous seismological studies have revealed a wide distribution of seismic anisotropy in the upper portion of the lower mantle beneath many subduction zones, the existence of anisotropy at these depths away from subducted slabs remains debated. Here we use P-wave azimuthal anisotropy tomography to image the crust and mantle down to 1,600-km depth. We find prominent anisotropic patterns in the upper portion of the lower mantle beneath the Philippine Sea Plate. Substantial azimuthal anisotropy with N-S fast-velocity directions occurs at 700-900-km depths. We interpret this azimuthal anisotropy as a remnant of the Pacific lower mantle flow field about 50 million years ago. Two isolated high-velocity anomalies at 700-1,600-km depths may be vestigial pieces of the subducted Izanagi slab with seismic velocity features suggesting a shift in the Pacific lower mantle flow field by about 40 million years ago. Our findings provide seismic evidence for the existence of complex lower mantle flows and deformation mechanisms away from subduction zones. A record of lower mantle flow from 50 million years ago is preserved in the Pacific region and provides evidence for past lower mantle deformation, according to seismic anisotropy tomography.
WOS关键词WAVE ANISOTROPIC TOMOGRAPHY ; PYROLITIC LOWER MANTLE ; TRAVEL-TIMES ; DYNAMICS ; ZONE ; DISCONTINUITY ; PEROVSKITE ; REGION ; CREEP
资助项目National Natural Science Foundation of China (National Science Foundation of China) ; Ocean Hemisphere Project[41976052] ; Ocean Hemisphere Project[42376080] ; Ocean Hemisphere Project[41876043] ; Ocean Hemisphere Project[92355302] ; National Natural Science Foundation of China[XDB42020102] ; Strategic Priority Research Program of the Chinese Academy of Sciences[tsqn202312263] ; Taishan Scholars Program[19H01996] ; Japan Society for the Promotion of Science
WOS研究方向Geology
语种英语
WOS记录号WOS:001183649000001
出版者NATURE PORTFOLIO
源URL[http://ir.qdio.ac.cn/handle/337002/184920]  
专题海洋研究所_海洋地质与环境重点实验室
通讯作者Fan, Jianke; Li, Cuilin
作者单位1.Chinese Acad Sci, Inst Geol & Geophys, State Key Lab Lithospher Evolut, Beijing, Peoples R China
2.Tohoku Univ, Grad Sch Sci, Dept Geophys, Sendai, Japan
3.Qingdao Natl Lab Marine Sci & Technol, Lab Marine Geol, Qingdao, Peoples R China
4.Chinese Acad Sci, Inst Oceanol, Ctr Ocean Mega Sci, CAS Key Lab Marine Geol & Environm, Qingdao, Peoples R China
推荐引用方式
GB/T 7714		 Fan, Jianke,Zhao, Dapeng,Li, Cuilin,et al. Remnants of shifting early Cenozoic Pacific lower mantle flow imaged beneath the Philippine Sea Plate[J]. NATURE GEOSCIENCE,2024:8.
APA Fan, Jianke,Zhao, Dapeng,Li, Cuilin,Liu, Lijun,&Dong, Dongdong.(2024).Remnants of shifting early Cenozoic Pacific lower mantle flow imaged beneath the Philippine Sea Plate.NATURE GEOSCIENCE,8.
MLA Fan, Jianke,et al."Remnants of shifting early Cenozoic Pacific lower mantle flow imaged beneath the Philippine Sea Plate".NATURE GEOSCIENCE (2024):8.

入库方式： OAI收割

来源：海洋研究所

浏览0
下载0
收藏0
其他版本

除非特别说明，本系统中所有内容都受版权保护，并保留所有权利。