Institutional Repository of State Key Laboratory of Lithospheric Evolution
| Enigmatic crustal and upper mantle structure in the NE Sino-Korean Craton based on nuclear explosion seismic data | |
| Zhang, Xiaoqing1,2; Thybo, Hans3,4,5; Artemieva, Irina M.3,4,6,7; Xu, Tao1,8 | |
| 2023-03-01 | |
| Source Publication | JOURNAL OF GEODYNAMICS
 |
| ISSN | 0264-3707 |
| Volume | 155Pages:16 |
| Abstract | We interpret the crustal and upper mantle structure along-2500 km long seismic profiles in the northeastern part of the Sino-Korean Craton (SKC). The seismic data with high signal-to-noise ratio were acquired with a nuclear explosion in North Korea as source. Seismic sections show several phases including Moho reflections (PmP) and their surface multiple (PmPPmP), upper mantle refractions (P), primary reflections (PxP, PL, P410), exceptionally strong multiple reflections from the Moho (PmPPxP), and upper mantle scattering phases, which we model by ray-tracing and synthetic seismograms for a 1-D fine-scale velocity model. The observations require a thin crust (30 km) with a very low average crustal velocity (ca. 6.15 km/s) and exceptionally strong velocity contrast at the Moho discontinuity, which can be explained by a thin Moho transition zone (< 5 km thick) with strong horizontal anisotropy. We speculate that this anisotropy was induced by lower crustal flow during delamination dripping. An intra-lithospheric discontinuity (ILD) at-75 km depth with positive velocity contrast is probably caused by the phase transformation from spinel to garnet. Delayed first arrivals followed by a long wave train of scattered phases of up to 4 s duration are observed in the 800-1300 km offset range, which are modelled by continuous stochastic velocity fluctuations in a low-velocity zone (LVZ) below the Mid-Lithospheric Discontinuity (MLD) between 120 and 190 km depth. The average velocity of this LVZ is about 8.05 km/s, which is much lower than the IASP91 standard model. This LVZ is most likely caused by rocks which are either partially molten or close to the solidus, which explains both low velocity and the heterogeneous structure. |
| Keyword | Nuclear explosion Thin lower crust Intra-Lithospheric discontinuity Mid-Lithospheric discontinuity Low velocity zone Upper mantle inhomogeneity |
| DOI | 10.1016/j.jog.2022.101957 |
| Funding Organization | National Science Foundation of China ; National Science Foundation of China ; MOST special funds of China ; MOST special funds of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Science Foundation of China ; National Science Foundation of China ; MOST special funds of China ; MOST special funds of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Science Foundation of China ; National Science Foundation of China ; MOST special funds of China ; MOST special funds of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Science Foundation of China ; National Science Foundation of China ; MOST special funds of China ; MOST special funds of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China |
| WOS Keyword | NORTH CHINA CRATON ; LITHOSPHERE-ASTHENOSPHERE BOUNDARY ; VELOCITY STRUCTURE BENEATH ; TRANSITION ZONE ; EASTERN CHINA ; DISCONTINUITY ; DESTRUCTION ; EVOLUTION ; PROFILE ; ANISOTROPY |
| Language | 英语 |
| Funding Project | National Science Foundation of China[92055210] ; MOST special funds of China[GPMR2019010] ; National Natural Science Foundation of China[42130807] ; National Natural Science Foundation of China[41974048] ; National Natural Science Foundation of China[42104042] ; National Natural Science Foundation of China[42104040] |
| Funding Organization | National Science Foundation of China ; National Science Foundation of China ; MOST special funds of China ; MOST special funds of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Science Foundation of China ; National Science Foundation of China ; MOST special funds of China ; MOST special funds of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Science Foundation of China ; National Science Foundation of China ; MOST special funds of China ; MOST special funds of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Science Foundation of China ; National Science Foundation of China ; MOST special funds of China ; MOST special funds of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China |
| WOS Research Area | Geochemistry & Geophysics |
| WOS Subject | Geochemistry & Geophysics |
| WOS ID | WOS:000906542600001 |
| Publisher | PERGAMON-ELSEVIER SCIENCE LTD |
| Citation statistics | |
| Document Type | 期刊论文 |
| Identifier | http://ir.iggcas.ac.cn/handle/132A11/106944 |
| Collection | 岩石圈演化国家重点实验室 |
| Corresponding Author | Thybo, Hans |
| Affiliation | 1.Inst Geol & Geophys, Chinese Acad Sci, State Key Lab Lithospher Evolut, Beijing 100029, Peoples R China 2.Univ Chinese Acad Sci, Beijing 100049, Peoples R China 3.Chinese Acad Geol Sci, Sino Probe Lab, Beijing, Peoples R China 4.China Univ Geosci, Sch Earth Sci, State Key Lab Geol Proc & Mineral Resources, Wuhan, Peoples R China 5.Istanbul Tech Univ, Eurasia Inst Earth Sci, TR-34469 Maslak, I?stanbul, Turkey 6.Stanford Univ, Dept Geophys, Stanford, CA 94305 USA 7.GEOMAR Helmholtz Ctr Ocean Res, Sect Marine Geodynam, D-24148 Kiel, Germany 8.Innovat Acad Earth Sci, CAS, Beijing 100029, Peoples R China |
| Recommended Citation GB/T 7714 | Zhang, Xiaoqing,Thybo, Hans,Artemieva, Irina M.,et al. Enigmatic crustal and upper mantle structure in the NE Sino-Korean Craton based on nuclear explosion seismic data[J]. JOURNAL OF GEODYNAMICS,2023,155:16. |
| APA | Zhang, Xiaoqing,Thybo, Hans,Artemieva, Irina M.,&Xu, Tao.(2023).Enigmatic crustal and upper mantle structure in the NE Sino-Korean Craton based on nuclear explosion seismic data.JOURNAL OF GEODYNAMICS,155,16. |
| MLA | Zhang, Xiaoqing,et al."Enigmatic crustal and upper mantle structure in the NE Sino-Korean Craton based on nuclear explosion seismic data".JOURNAL OF GEODYNAMICS 155(2023):16. |
| Files in This Item: | There are no files associated with this item. | |||||
Items in the repository are protected by copyright, with all rights reserved, unless otherwise indicated.
Edit Comment