Lateral variations in crustal Lg attenuation in and around the Hangay Dome, Mongolia
文献类型：期刊论文
| 作者 | Zhang, Lei1,2; Zhao, Lian-Feng1,3; Xie, Xiao-Bi4; Wu, Qing-Ju5; Yao, Zhen-Xing1 |
| 刊名 | INTERNATIONAL JOURNAL OF EARTH SCIENCES
 |
| 出版日期 | 2022-01-20 |
| 页码 | 16 |
| 关键词 | Hangay Dome in central Mongolia Seismic Lg-wave Seismic attenuation Crustal thermal structures |
| ISSN号 | 1437-3254 |
| DOI | 10.1007/s00531-021-02131-8 |
| 英文摘要 | The Hangay Dome in central Mongolia, a typical intraplate plateau far from plate boundaries, is characterized by rapid uplift and widespread volcanic activities in the Cenozoic. However, thermodynamics process for the landform in Cenozoic remains mysterious. Seismic Lg-wave, which is sensitive to crustal thermal status, can provide constraints on the crustal attenuation structure; thus, may be helpful to understand the thermodynamics. In this study, we estimate the Lg-wave quality factor Q(Lg) across the Hangay Dome and its surroundings from 231 crustal earthquakes recorded by 136 regional broadband seismic stations distributed throughout north China and Mongolia. Using a joint tomographic method, we construct a broadband Lg attenuation model at 58 discrete frequencies distributed evenly in log scale between 0.1 and 20.0 Hz. The obtained Q(Lg) model provides new insights into crustal attenuation in the region. The strong Lg wave attenuation observed in the northeastern Hangay Dome and western Gobi-Altai, associated with crust low-resistivity anomalies, low S-wave velocity region, heat flow and volcanic activities, suggest the existence of possible partial melting due to asthenospheric upwelling. The widespread moderately-low Q(Lg) values around the perimeter of the Hangay Dome imply that the margin of the Hangay Dome has been weakened. The center part of the uplift is a small high Q(Lg) nucleus, which is possibly the residue of the Precambrian basement. The above observations suggest that the Hangay Dome is lifted by small-scale asthenospheric upwellings. During this process, the very hot mantle materials strongly modified the Hangar Dome and also caused the Cenozoic volcanism and major earthquakes. |
| WOS关键词 | REGIONAL SEISMIC PHASES ; NUCLEAR-EXPLOSIONS ; WAVE ATTENUATION ; UNITED-STATES ; UPPER-MANTLE ; TOMOGRAPHY ; PLATEAU ; BENEATH ; MAGNITUDES ; RESOLUTION |
| 资助项目 | National Key Research and Development Program of China[2017YFC0601206] ; National Natural Science Foundation of China[41974061] ; National Natural Science Foundation of China[41974054] ; National Natural Science Foundation of China[41630210] ; National Natural Science Foundation of China[41674060] |
| WOS研究方向 | Geology |
| 语种 | 英语 |
| WOS记录号 | WOS:000745805800001 |
| 出版者 | SPRINGER |
| 资助机构 | National Key Research and Development Program of China ; National Key Research and Development Program of China ; National Key Research and Development Program of China ; National Key Research and Development Program of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Key Research and Development Program of China ; National Key Research and Development Program of China ; National Key Research and Development Program of China ; National Key Research and Development Program of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Key Research and Development Program of China ; National Key Research and Development Program of China ; National Key Research and Development Program of China ; National Key Research and Development Program of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Key Research and Development Program of China ; National Key Research and Development Program of China ; National Key Research and Development Program of China ; National Key Research and Development Program of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China |
| 源URL | [http://ir.iggcas.ac.cn/handle/132A11/103991]  |
| 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 | Zhao, Lian-Feng |
| 作者单位 | 1.Chinese Acad Sci, Inst Geol & Geophys, Key Lab Earth & Planetary Phys, Beijing, Peoples R China 2.Univ Chinese Acad Sci, Coll Earth Sci, Beijing, Peoples R China 3.Chinese Acad Sci, Inst Geol & Geophys, Heilongjiang Mohe Observ Geophys, Beijing, Peoples R China 4.Univ Calif Santa Cruz, Inst Geophys & Planetary Phys, Santa Cruz, CA 95064 USA 5.China Earthquake Adm, Inst Geophys, Beijing, Peoples R China |
| 推荐引用方式 GB/T 7714 | Zhang, Lei,Zhao, Lian-Feng,Xie, Xiao-Bi,et al. Lateral variations in crustal Lg attenuation in and around the Hangay Dome, Mongolia[J]. INTERNATIONAL JOURNAL OF EARTH SCIENCES,2022:16. |
| APA | Zhang, Lei,Zhao, Lian-Feng,Xie, Xiao-Bi,Wu, Qing-Ju,&Yao, Zhen-Xing.(2022).Lateral variations in crustal Lg attenuation in and around the Hangay Dome, Mongolia.INTERNATIONAL JOURNAL OF EARTH SCIENCES,16. |
| MLA | Zhang, Lei,et al."Lateral variations in crustal Lg attenuation in and around the Hangay Dome, Mongolia".INTERNATIONAL JOURNAL OF EARTH SCIENCES (2022):16. |
入库方式： OAI收割
来源：地质与地球物理研究所
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