Seismic probing of continental subduction zones
文献类型：期刊论文
| 作者 | Zhao, Liang1,2; Xu, Xiaobing1; Malusa, Marco G.3 |
| 刊名 | JOURNAL OF ASIAN EARTH SCIENCES
 |
| 出版日期 | 2017-09-01 |
| 卷号 | 145页码:37-45 |
| 关键词 | Seismic observations Continental subduction Ultra-high-pressure rock exhumation Mantle deformation Slab geometry |
| ISSN号 | 1367-9120 |
| DOI | 10.1016/j.jseaes.2017.05.026 |
| 文献子类 | Review |
| 英文摘要 | High-resolution images of Earth's interior provide pivotal information for the understanding of a range of geodynamic processes, including continental subduction and exhumation of ultrahigh-pressure (UHP) metamorphic rocks. Here we present a synthesis of available global seismic observations on continental subduction zones, and selected examples of seismic probing from the European Alps, the Himalaya-Tibet and the Qinling-Dabie orogenic belts. Our synthesis and examples show that slabs recognized beneath exhumed continental UHP terranes generally have shallow dip angles (< 45 degrees) at depths < 100 km, to become much steeper at depths > 100 km. Slabs underlined by a clear high velocity anomaly from Earth's surface to the mantle are generally Cenozoic in age. Some of these slabs are continuous, whereas other continental subduction zones are located above discontinuous high velocity anomalies possibly suggesting slab breakoff. The density of seismic stations and the quality of recordings are of primary importance to get high-resolution images of the upper mantle to be used as a starting point to provide reliable geodynamic interpretations. In some cases, areas previously indicated as possible site of slab breakoff, such as the European Alps, have been later proven to be located above a continuous slab by using higher quality travel time data from denser seismic arrays. Discriminating between oceanic and continental slabs can be challenging, but valuable information can be provided by combining teleseismic tomography and receiver function analysis. The upper mantle beneath most continental UHP terranes generally shows complex seismic anisotropy patterns that are potentially preserved even in pre-Cenozoic subduction zones. These patterns can be used to provide information on continental slabs that are no longer highlighted by a clear high-velocity anomaly. |
| WOS关键词 | PRESSURE METAMORPHIC ROCKS ; WAVE SPLITTING MEASUREMENTS ; MANTLE STRUCTURE BENEATH ; TRAVEL-TIME TOMOGRAPHY ; PAPUA-NEW-GUINEA ; WESTERN ALPS ; ANISOTROPY BENEATH ; TIBETAN PLATEAU ; SOUTHERN TIBET ; SLAB BREAKOFF |
| WOS研究方向 | Geology |
| 语种 | 英语 |
| WOS记录号 | WOS:000410012200003 |
| 出版者 | PERGAMON-ELSEVIER SCIENCE LTD |
| 资助机构 | National Natural Science Foundation of China(91414301 ; National Natural Science Foundation of China(91414301 ; State Key Laboratory of Lithospheric Evolution, China ; State Key Laboratory of Lithospheric Evolution, China ; 41625016) ; 41625016) ; National Natural Science Foundation of China(91414301 ; National Natural Science Foundation of China(91414301 ; State Key Laboratory of Lithospheric Evolution, China ; State Key Laboratory of Lithospheric Evolution, China ; 41625016) ; 41625016) ; National Natural Science Foundation of China(91414301 ; National Natural Science Foundation of China(91414301 ; State Key Laboratory of Lithospheric Evolution, China ; State Key Laboratory of Lithospheric Evolution, China ; 41625016) ; 41625016) ; National Natural Science Foundation of China(91414301 ; National Natural Science Foundation of China(91414301 ; State Key Laboratory of Lithospheric Evolution, China ; State Key Laboratory of Lithospheric Evolution, China ; 41625016) ; 41625016) |
| 源URL | [http://ir.iggcas.ac.cn/handle/132A11/61885]  |
| 专题 | 地质与地球物理研究所_岩石圈演化国家重点实验室 |
| 通讯作者 | Zhao, Liang |
| 作者单位 | 1.Chinese Acad Sci, Inst Geol & Geophys, State Key Lab Lithospher Evolut, Beijing, Peoples R China 2.CAS Ctr Excellence Tibetan Plateau Earth Sci, Beijing, Peoples R China 3.Univ Milano Bicocca, Dept Earth & Environm Sci, Milan, Italy |
| 推荐引用方式 GB/T 7714 | Zhao, Liang,Xu, Xiaobing,Malusa, Marco G.. Seismic probing of continental subduction zones[J]. JOURNAL OF ASIAN EARTH SCIENCES,2017,145:37-45. |
| APA | Zhao, Liang,Xu, Xiaobing,&Malusa, Marco G..(2017).Seismic probing of continental subduction zones.JOURNAL OF ASIAN EARTH SCIENCES,145,37-45. |
| MLA | Zhao, Liang,et al."Seismic probing of continental subduction zones".JOURNAL OF ASIAN EARTH SCIENCES 145(2017):37-45. |
入库方式： OAI收割
来源：地质与地球物理研究所
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