气候变化领域集成服务门户(CCPortal): Upper Mantle Structure of the Southern U.S. Continental Margin From Teleseismic Traveltime Tomography

CCPortal

DOI	10.1029/2019GL085482
	Upper Mantle Structure of the Southern U.S. Continental Margin From Teleseismic Traveltime Tomography
	Netto A.; Pulliam J.
发表日期	2020
ISSN	0094-8276
卷号	47 期号:7
英文摘要	The southern U.S. continental margin records a rich tectonic history spanning ~1.35 Ga, including two complete Wilson cycles. Due to a thick sediment cover, the paucity of local seismicity, and sparse seismic instrumentation, the tectonomagmatic evolution of this passive margin remains uncertain. The recent USArray seismic network offers an opportunity to address unresolved issues by imaging the crust and upper mantle. Direct teleseismic P and S traveltimes recorded at ~1,600 stations are mapped into 3-D velocity perturbations. P and S tomography models, although generated independently, are broadly consistent, with a strong correlation between anomaly patterns in the sublithospheric mantle and known crustal features. Fast mantle velocities correspond to the Laurentia Craton and Llano and Grenville terranes, while intracratonic rift systems and Paleozoic arc terranes are marked by slow anomalies in the upper mantle. ©2020. American Geophysical Union. All Rights Reserved.
英文关键词	Seismology; Tomography; Anomaly patterns; Continental margin; Seismic instrumentation; Strong correlation; Tectonomagmatic evolution; Travel time tomography; Upper mantle structure; Velocity perturbation; Structural geology; continental margin; Paleozoic; teleseismic wave; travel time; upper crust; upper mantle; United States
语种	英语
来源期刊	Geophysical Research Letters
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/170515
作者单位	Department of Geosciences, Baylor University, Waco, TX, United States
推荐引用方式 GB/T 7714	Netto A.,Pulliam J.. Upper Mantle Structure of the Southern U.S. Continental Margin From Teleseismic Traveltime Tomography[J],2020,47(7).
APA	Netto A.,&Pulliam J..(2020).Upper Mantle Structure of the Southern U.S. Continental Margin From Teleseismic Traveltime Tomography.Geophysical Research Letters,47(7).
MLA	Netto A.,et al."Upper Mantle Structure of the Southern U.S. Continental Margin From Teleseismic Traveltime Tomography".Geophysical Research Letters 47.7(2020).