Cause of Enigmatic Upper-Mantle Earthquakes in Central Wyoming
文献类型：期刊论文
| 作者 | Zhao, Dapeng2; Liang, Xuran1,3; Toyokuni, Genti2; Hua, Yuanyuan1,3; Xu, Yi-Gang1,3 |
| 刊名 | SEISMOLOGICAL RESEARCH LETTERS
 |
| 出版日期 | 2024-07-01 |
| 卷号 | 95期号:4页码:2497-2505 |
| ISSN号 | 0895-0695 |
| DOI | 10.1785/0220230333 |
| 英文摘要 | Earthquakes deeper than 60 km generally occur in subducting slabs. However, on 21 September 2013 two earthquakes (M 4.8 and 3.0) occurred at-71 to 75 km depths in the upper mantle beneath central Wyoming in the stable North American continent, where there is no actively subducting slab at present. The cause of the two events is still unclear. Here, we present detailed 3D P- wave isotropic and anisotropic tomography down to 750 km depth under Wyoming and adjacent areas. Our result shows that the two Wyoming events took place within a high-velocity (high- V ) body at 0 -160 km depths, which may be part of dense continental lithosphere. Another high- V body exists at-300 to 500 km depths, which may reflect a remnant of the subducted Farallon slab. A significant low-velocity (low- V ) zone appears at-200 to 300 km depths between the two high- V bodies, and the low- V zone exhibits seismic anisotropy that V P is greater in the vertical direction than that in the horizontal direction. The low- V zone may include ascending fluids from dehydration of the subducted slab remnant, which was promoted by the nearby hot Yellowstone plume. It is highly possible that the ascending fluids induced the 2013 Wyoming upper-mantle earthquakes. |
| WOS研究方向 | Geochemistry & Geophysics |
| 语种 | 英语 |
| WOS记录号 | WOS:001268198200003 |
| 源URL | [http://ir.gig.ac.cn/handle/344008/78282]  |
| 专题 | 同位素地球化学国家重点实验室 |
| 通讯作者 | Zhao, Dapeng |
| 作者单位 | 1.Chinese Acad Sci, Guangzhou Inst Geochem, State Key Lab Isotope Geochem, Guangzhou, Peoples R China 2.Tohoku Univ, Grad Sch Sci, Dept Geophys, Sendai, Japan 3.Chinese Acad Sci, Guangzhou Inst Geochem, CAS Ctr Excellence Deep Earth Sci, Guangzhou, Peoples R China |
| 推荐引用方式 GB/T 7714 | Zhao, Dapeng,Liang, Xuran,Toyokuni, Genti,et al. Cause of Enigmatic Upper-Mantle Earthquakes in Central Wyoming[J]. SEISMOLOGICAL RESEARCH LETTERS,2024,95(4):2497-2505. |
| APA | Zhao, Dapeng,Liang, Xuran,Toyokuni, Genti,Hua, Yuanyuan,&Xu, Yi-Gang.(2024).Cause of Enigmatic Upper-Mantle Earthquakes in Central Wyoming.SEISMOLOGICAL RESEARCH LETTERS,95(4),2497-2505. |
| MLA | Zhao, Dapeng,et al."Cause of Enigmatic Upper-Mantle Earthquakes in Central Wyoming".SEISMOLOGICAL RESEARCH LETTERS 95.4(2024):2497-2505. |
入库方式： OAI收割
来源：广州地球化学研究所
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