气候变化领域集成服务门户(CCPortal): Seismic attenuation tomography in southwestern China: Insight into the evolution of crustal flow in the Tibetan Plateau

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DOI	10.1016/j.tecto.2020.228589
	Seismic attenuation tomography in southwestern China: Insight into the evolution of crustal flow in the Tibetan Plateau
	Dai A.; Tang C.-C.; Liu L.; Xu R.
发表日期	2020
ISSN	00401951
卷号	792
英文摘要	Crustal flow in southwestern China is commonly attributed to the continental collision between the Indian and the Eurasian plates. Therefore, studying crustal flow in this area can provide valuable insight into the collisional process. The quality factor (Q) is an indicator of seismic wave attenuation that provides constraints on lithology, rheology, and geodynamic processes, which are vital for interpreting the nature of the crustal flow in a given region. In this study, we used local seismic waveforms to obtain regional attenuation models for P- (QP) and S- (QS) waves in the Sichuan-Yunnan region (SYR). The Emeishan Large Igneous Province (ELIP) is characterized by high QP and QS values in the Middle Yunnan block (MYB) at depths greater than 5 km. The QP and QS values in most of the fault zones surrounding the MYB were lower than 300, indicating that the material within crustal faults causes high waveform attenuation. Our results suggest that the crustal flow was diverted into two channels in the northern MYB due to resistance from the ELIP. To illuminate the tectonic dynamics of the SYR, we propose a simple model that explains both the evolution of the crustal flow and the variation in the seismic wave attenuation. © 2020
关键词	Crustal flow Seismic attenuation Sichuan-Yunnan region Tibetan Plateau
英文关键词	Geodynamics; Lithology; Seismic waves; Collisional process; Continental collisions; Emeishan large igneous provinces; Geodynamic process; Seismic attenuation; Seismic wave attenuations; Seismic waveforms; Sichuan-Yunnan region; Seismology; continental collision; crustal evolution; Eurasian plate; Indian plate; large igneous province; P-wave; S-wave; seismic attenuation; seismic tomography; seismic wave; China; Qinghai-Xizang Plateau; Sichuan; Yunnan
语种	英语
来源期刊	Tectonophysics
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/207736
作者单位	Hubei Subsurface Multi-scale Imaging Key Laboratory, Institute of Geophysics and Geomatics, China University of Geosciences, Wuhan, Hubei 430074, China; State Key Laboratory of Geological Processes and Mineral Resources, Institute of Geophysics and Geomatics, China University of Geosciences, Wuhan, Hubei 430074, China; Geophysical Exploration Brigade of Hubei Geological Bureau, Wuhan, Hubei 430056, China; Research Institute of Disaster Reduction and Emergency Rescue, Sichuan Earthquake Agency, Chengdu, Sichuan 610041, China
推荐引用方式 GB/T 7714	Dai A.,Tang C.-C.,Liu L.,et al. Seismic attenuation tomography in southwestern China: Insight into the evolution of crustal flow in the Tibetan Plateau[J],2020,792.
APA	Dai A.,Tang C.-C.,Liu L.,&Xu R..(2020).Seismic attenuation tomography in southwestern China: Insight into the evolution of crustal flow in the Tibetan Plateau.Tectonophysics,792.
MLA	Dai A.,et al."Seismic attenuation tomography in southwestern China: Insight into the evolution of crustal flow in the Tibetan Plateau".Tectonophysics 792(2020).