globalchange  > 科学计划与规划
DOI: 10.1002/2016GL070918
论文题名:
The Northern Appalachian Anomaly: A modern asthenospheric upwelling
作者: Menke W.; Skryzalin P.; Levin V.; Harper T.; Darbyshire F.; Dong T.
刊名: Geophysical Research Letters
ISSN: 0094-8533
EISSN: 1944-8264
出版年: 2016
卷: 43, 期:19
起始页码: 10173
结束页码: 10179
语种: 英语
英文关键词: asthenosphere ; Great Meteor hot spot ; Northern Appalachian Anomaly ; seismic tomography ; upwelling
Scopus关键词: Seismology ; Velocity ; Appalachian ; Asthenosphere ; Hot spot ; Seismic tomography ; Upwelling ; Shear flow
英文摘要: The Northern Appalachian Anomaly (NAA) is an intense, laterally localized (400 km diameter) low-velocity anomaly centered in the asthenosphere beneath southern New England. Its maximum shear velocity contrast, at 200 km depth, is about 10%, and its compressional-to-shear velocity perturbation ratio is about unity, values compatible with it being a modern thermal anomaly. Although centered close to the track of the Great Meteor hot spot, it is not elongated parallel to it and does not crosscut the cratonic margin. In contrast to previous explanations, we argue that the NAA's spatial association with the hot spot track is coincidental and that it is caused by small-scale upwelling associated with an eddy in the asthenospheric flow field at the continental margin. That the NAA is just one of several low-velocity features along the eastern margin of North America suggests that this process may be globally ubiquitous. ©2016. American Geophysical Union. All Rights Reserved.
URL: https://www.scopus.com/inward/record.uri?eid=2-s2.0-84990929682&doi=10.1002%2f2016GL070918&partnerID=40&md5=5947cf0afc4bc2fc6a3a871e9ad9746b
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/9496
Appears in Collections:科学计划与规划
气候变化与战略

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作者单位: Lamont-Doherty Earth Observatory, Columbia University, Palisades, NY, United States

Recommended Citation:
Menke W.,Skryzalin P.,Levin V.,et al. The Northern Appalachian Anomaly: A modern asthenospheric upwelling[J]. Geophysical Research Letters,2016-01-01,43(19).
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