| DOI: | 10.1002/2014GL061231
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| 论文题名: | P and S wave tomography of the mantle beneath the United States |
| 作者: | Schmandt B.; Lin F.-C.
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| 刊名: | Geophysical Research Letters
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| ISSN: | 0094-9777
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| EISSN: | 1944-9508
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| 出版年: | 2014
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| 卷: | 41, 期:18 | | 起始页码: | 6342
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| 结束页码: | 6349
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| 语种: | 英语
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| 英文关键词: | hot spot
; Laramide orogeny
; passive margin
; subduction
; tomography
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| Scopus关键词: | Shear waves
; Tectonics
; Tomography
; Hot spot
; Laramide
; Low-velocity anomaly
; Mantle seismic structures
; Northern Appalachians
; passive margin
; Rayleigh-wave phase velocity
; subduction
; Velocity
; array
; Cenozoic
; crustal structure
; hot spot
; magmatism
; mantle
; Mesozoic
; numerical model
; orogeny
; P-wave
; passive margin
; Rayleigh wave
; S-wave
; seismic tomography
; subduction zone
; tomography
; Appalachians
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| 英文摘要: | Mantle seismic structure beneath the United States spanning from the active western plate margin to the passive eastern margin was imaged with teleseismic P and S wave traveltime tomography including USArray data up to May 2014. To mitigate artifacts from crustal structure 5-40 s, Rayleigh wave phase velocities were used to create a 3-D starting model. Major features of the final P and S models include two distinct low-velocity anomalies at depths of ~60-300 km beneath the central and northern Appalachians and passive margin. The central Appalachian low-velocity anomaly coincides with Eocene basaltic magmatism, and the northern anomaly is located along the Cretaceous track of the Great Meteor hot spot. At depths of ~300-700 km beneath the central and eastern U.S. large high-velocity anomalies are inferred to be remnants of the Farallon slab that subducted prior to ~40 Ma during the Laramide orogeny. Key Points P wave and S wave mantle tomography spanning the contiguous U.S.Passive margin low-velocity anomalies linked to Cenozoic and Mesozoic volcanismSome Laramide-age slab fragments have yet to sink into the lower mantle ©2014. American Geophysical Union. All Rights Reserved. |
| URL: | https://www.scopus.com/inward/record.uri?eid=2-s2.0-84911072131&doi=10.1002%2f2014GL061231&partnerID=40&md5=96d385af39383e80fba085a6c85d17e1
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| Citation statistics: |
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| 资源类型: | 期刊论文
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| 标识符: | http://119.78.100.158/handle/2HF3EXSE/7041
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| Appears in Collections: | 气候减缓与适应
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作者单位: | Department of Earth and Planetary Sciences, University of New Mexico, Albuquerque, NM, United States
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| Recommended Citation: | |
Schmandt B.,Lin F.-C.. P and S wave tomography of the mantle beneath the United States[J]. Geophysical Research Letters,2014-01-01,41(18).
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