气候变化领域集成服务门户(CCPortal): Imaging the Crustal Interfaces Along the Ryukyu Arc-Trough System Using Precursors to Teleseismic sP and pP

CCPortal

DOI	10.1029/2020JB020413
	Imaging the Crustal Interfaces Along the Ryukyu Arc-Trough System Using Precursors to Teleseismic sP and pP
	Jia X.; Sun D.
发表日期	2021
ISSN	21699313
卷号	126 期号:2
英文摘要	The Ryukyu arc (RA)-trough system, which is uniquely characterized by the Okinawa trough (OT) experiencing an early stage of continental disintegration, provides an ideal location to study continental rifting processes. However, the crustal structure beneath this region is not well resolved due to limited seismic surveys and station coverage. Here, by taking advantage of the well-distributed intermediate-depth earthquakes beneath the RA, we invert for the crustal structures beneath the RA-trough system from the depth phases pP and sP and their precursors, underside reflected from the Moho and intracrustal interface. Along the RA, the Moho depth varies from 22 to 27 km indicating a thinner continental crust. Beneath the OT, the crustal thickness gradually decreases from 26 km to 15 km toward the south, which correlates with the trough rifting rates. At the south continental shelf, a thick crust with Moho depth of 29 km presents. In the transition region from the middle OT to the continental shelf, we observe multipathed precursors, which can be modeled with a 10 km Moho offset. The offset occurs in a gentle slope with angle of 27° dipping to the northwest, which supports a slow spreading process across the boundary between the middle OT and the continental shelf. © 2020. American Geophysical Union. All Rights Reserved.
语种	英语
来源期刊	Journal of Geophysical Research: Solid Earth
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/187361
作者单位	Laboratory of Seismology and Physics of Earth's Interior, School of Earth and Space Sciences, University of Science and Technology of China, Hefei, China; National Geophysics Observatory at Mengcheng, Mengcheng, China; CAS Center for Excellence in Comparative Planetology, China, Hefei, China
推荐引用方式 GB/T 7714	Jia X.,Sun D.. Imaging the Crustal Interfaces Along the Ryukyu Arc-Trough System Using Precursors to Teleseismic sP and pP[J],2021,126(2).
APA	Jia X.,&Sun D..(2021).Imaging the Crustal Interfaces Along the Ryukyu Arc-Trough System Using Precursors to Teleseismic sP and pP.Journal of Geophysical Research: Solid Earth,126(2).
MLA	Jia X.,et al."Imaging the Crustal Interfaces Along the Ryukyu Arc-Trough System Using Precursors to Teleseismic sP and pP".Journal of Geophysical Research: Solid Earth 126.2(2021).