| DOI: | 10.1002/2015GL063613
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| 论文题名: | Ambient noise tomography across the southern Alaskan Cordillera |
| 作者: | Ward K.M.
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| 刊名: | Geophysical Research Letters
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| ISSN: | 0094-8707
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| EISSN: | 1944-8438
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| 出版年: | 2015
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| 卷: | 42, 期:9 | | 起始页码: | 3218
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| 结束页码: | 3227
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| 语种: | 英语
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| 英文关键词: | Alaska
; ambient noise tomography
; continental magmatism
; crustal structure
; tectonics
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| Scopus关键词: | Acoustic noise
; Data mining
; Liquid sloshing
; Phase velocity
; Structural geology
; Tectonics
; Volcanoes
; Alaska
; Ambient noise tomographies
; Crustal structure
; Crustal thickness
; Intermediate periods
; Magmatisms
; Seismic station
; Sharp transition
; Tomography
; ambient noise
; crustal thickness
; data mining
; geophysics
; microplate
; phase velocity
; seismic wave
; subduction
; volcanic belt
; Alaska
; Canada
; United States
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| 英文摘要: | I present the results of an extensive data mining effort integrating 197 permanent and temporary seismic stations into a Rayleigh wave ambient noise study across southern Alaska and westernmost Canada. Principal observations of my tomography model are largely consistent with mapped geology features and previous geophysical studies while providing previously unavailable, laterally continuous details of the southern Alaskan Cordillera lithosphere. At intermediate periods, a geophysically uniform crust is observed north of the Denali Fault and is consistent with a sharp transition in crustal thickness. Under the Wrangell volcanic belt, a prominent low-phase-velocity anomaly correlates well with the lateral extent of a relative low-gravity anomaly and Neogene surface volcanics. At longer periods, a low-phase-velocity anomaly bounds the inferred eastern extent of the subducted Yakutat microplate beneath the Wrangell volcanic belt. Key Points First ambient noise tomography results across the Alaskan Cordillera A geophysically uniform crust is observed north of the Denali Fault A low-phase-velocity anomaly is observed under the Wrangell volcanic belt ©2015. American Geophysical Union. All Rights Reserved. |
| URL: | https://www.scopus.com/inward/record.uri?eid=2-s2.0-84930481118&doi=10.1002%2f2015GL063613&partnerID=40&md5=0f9fa5a27d22cd5471bd4a73a25fbfa8
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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/8323
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| 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: | Department of Geosciences, University of Arizona, Tucson, AZ, United States
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| Recommended Citation: | |
Ward K.M.. Ambient noise tomography across the southern Alaskan Cordillera[J]. Geophysical Research Letters,2015-01-01,42(9).
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