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Deep Geophysical Anomalies Beneath the Changbaishan Volcano

文献类型：期刊论文

作者Li, Shaohua11,14; Li, Jiaqi12; Ferrand, Thomas P. P.1; Zhou, Tong13; Lv, Mingda2; Xi, Ziyi3; Maguire, Ross4; Han, Guangjie5,6; Li, Juan7,8; Bao, Xiyuan12
刊名JOURNAL OF GEOPHYSICAL RESEARCH-SOLID EARTH
出版日期2023-04-01
卷号128期号:4页码:12
ISSN号2169-9313
关键词intraplate volcanism low-velocity anomaly partial melting effective moduli mantle transition zone phase transition
DOI10.1029/2022JB025671
英文摘要Subsurface imaging is key to understanding the origin of intraplate volcanoes. The Changbaishan volcano, located about 2,000 km away from the western Pacific subduction zone, has several debated origins. To investigate this, we compared regional seismic tomography with the electrical resistivity results and obtained high-resolution 1D and quasi-2D velocity-depth profiles. We show that the upper mantle is characterized by two anomalies exhibiting distinct features which cannot be explained by the same mechanism. We document a localized low-velocity anomaly atop the 410-km discontinuity, where the P-wave velocity is reduced more than that of the S-wave (i.e., lower Vp/Vs). We propose that this anomaly is caused by the reduction of the effective moduli during the phase transformation of olivine. The other anomaly, located between 300 and 370 km depth, reveals a significant reduction of the S-wave velocity (i.e., higher Vp/Vs), associated with a reduction of the electrical resistivity, altogether consistent with partial melting.
WOS关键词WAVE-FORM TOMOGRAPHY ; SEISMIC STRUCTURE ; DISCONTINUITY BENEATH ; ADJOINT TOMOGRAPHY ; VELOCITY STRUCTURE ; ELASTIC PROPERTIES ; SOUND VELOCITIES ; SUBDUCTION ZONE ; P-WAVE ; MANTLE
资助项目Major science and technology projects of the Gansu Province[21ZD4FA011] ; Earthquake Science and Technology Development Fund of the Gansu Earthquake Agency[2021Y10] ; Science for Earthquake Resilience, China Earthquake Administration[XH19043] ; Alexander von Humboldt Foundation (Germany)
WOS研究方向Geochemistry & Geophysics
语种英语
出版者AMER GEOPHYSICAL UNION
WOS记录号WOS:000971184100001
资助机构Major science and technology projects of the Gansu Province ; Earthquake Science and Technology Development Fund of the Gansu Earthquake Agency ; Science for Earthquake Resilience, China Earthquake Administration ; Alexander von Humboldt Foundation (Germany) ; Major science and technology projects of the Gansu Province ; Earthquake Science and Technology Development Fund of the Gansu Earthquake Agency ; Science for Earthquake Resilience, China Earthquake Administration ; Alexander von Humboldt Foundation (Germany) ; Major science and technology projects of the Gansu Province ; Earthquake Science and Technology Development Fund of the Gansu Earthquake Agency ; Science for Earthquake Resilience, China Earthquake Administration ; Alexander von Humboldt Foundation (Germany) ; Major science and technology projects of the Gansu Province ; Earthquake Science and Technology Development Fund of the Gansu Earthquake Agency ; Science for Earthquake Resilience, China Earthquake Administration ; Alexander von Humboldt Foundation (Germany)
源URL[http://ir.iggcas.ac.cn/handle/132A11/111326]  
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Li, Jiaqi
作者单位1.Free Univ Berlin, Inst Geol Wissensch, Berlin, Germany
2.Michigan State Univ, Dept Earth & Environm Sci, E Lansing, MI USA
3.Michigan State Univ, Dept Computat Math Sci & Engn, E Lansing, MI USA
4.Univ Illinois, Champaign, IL USA
5.China Earthquake Networks Ctr, Beijing, Peoples R China
6.Chinese Acad Sci, Inst Geol & Geophys, Key Lab Earth & Planetary Phys, Beijing, Peoples R China
7.Univ Chinese Acad Sci, Coll Earth & Planetary Sci, Beijing, Peoples R China
8.Chinese Acad Sci, Inst Geol & Geophys, Heilongjiang Mohe Observ Geophys, Beijing, Peoples R China
9.Peking Univ, Sch Earth & Space Sci, Beijing, Peoples R China
10.CNOOC Res Inst, Beijing, Peoples R China
推荐引用方式
GB/T 7714		 Li, Shaohua,Li, Jiaqi,Ferrand, Thomas P. P.,et al. Deep Geophysical Anomalies Beneath the Changbaishan Volcano[J]. JOURNAL OF GEOPHYSICAL RESEARCH-SOLID EARTH,2023,128(4):12.
APA Li, Shaohua.,Li, Jiaqi.,Ferrand, Thomas P. P..,Zhou, Tong.,Lv, Mingda.,...&Bao, Tiezhao.(2023).Deep Geophysical Anomalies Beneath the Changbaishan Volcano.JOURNAL OF GEOPHYSICAL RESEARCH-SOLID EARTH,128(4),12.
MLA Li, Shaohua,et al."Deep Geophysical Anomalies Beneath the Changbaishan Volcano".JOURNAL OF GEOPHYSICAL RESEARCH-SOLID EARTH 128.4(2023):12.

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来源：地质与地球物理研究所

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