气候变化领域集成服务门户(CCPortal): Seismic Evidence for Crustal Modification Beneath the Hartford Rift Basin in the Northeastern United States

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DOI	10.1029/2020GL089316
	Seismic Evidence for Crustal Modification Beneath the Hartford Rift Basin in the Northeastern United States
	Gao H.; Yang X.; Long M.D.; Aragon J.C.
发表日期	2020
ISSN	0094-8276
卷号	47 期号:17
英文摘要	Extensive Mesozoic rifting along the eastern North American margin formed a series of basins, including the Hartford basin in southern New England. Nearly contemporaneously, the geographically widespread Central Atlantic Magmatic Province (CAMP) was emplaced. The Hartford basin provides an ideal place to investigate the roles of rifting and magmatism in crustal evolution, as the integration of the dense SEISConn array and other seismic networks provides excellent station coverage. Using full-wave ambient noise tomography, we constructed a detailed crustal model, revealing a low-velocity (Vs = 3.3–3.6 km/s) midcrust and a high-velocity (Vs = 4.0–4.5 km/s) lower crust beneath the Hartford basin. The low-velocity midcrust may correspond to a layer of radial anisotropy due to extension and crustal thinning during rifting. The high-velocity crustal root likely represents the remnant of magmatic underplating resulting from the CAMP event. Our findings shed light on crustal modification associated with supercontinental breakup, rifting, extension, and magmatism. ©2020. American Geophysical Union. All Rights Reserved.
英文关键词	Seismology; Ambient noise tomographies; Central atlantic magmatic provinces; Crustal evolution; Crustal thinning; Mesozoic rifting; Radial anisotropy; Seismic evidence; Southern New England; Velocity; continental breakup; crustal root; crustal structure; crustal thinning; lower crust; magmatism; Mesozoic; rifting; supercontinent; underplating; Atlantic Ocean; Atlantic Ocean (Central); Hartford Basin; New England; 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/169816
作者单位	Department of Geosciences, University of Massachusetts Amherst, Amherst, MA, United States; Now at Department of Earth, Atmospheric, and Planetary Sciences, Purdue University, West Lafayette, IN, United States; Department of Earth and Planetary Sciences, Yale University, New Haven, CT, United States; Now at Earthquake Science Center, United States Geological Survey, Menlo Park, Menlo Park, CA, United States
推荐引用方式 GB/T 7714	Gao H.,Yang X.,Long M.D.,et al. Seismic Evidence for Crustal Modification Beneath the Hartford Rift Basin in the Northeastern United States[J],2020,47(17).
APA	Gao H.,Yang X.,Long M.D.,&Aragon J.C..(2020).Seismic Evidence for Crustal Modification Beneath the Hartford Rift Basin in the Northeastern United States.Geophysical Research Letters,47(17).
MLA	Gao H.,et al."Seismic Evidence for Crustal Modification Beneath the Hartford Rift Basin in the Northeastern United States".Geophysical Research Letters 47.17(2020).