DOI: 10.1002/2016GL070103
论文题名: Estimating crustal thickness using SsPmp in regions covered by low-velocity sediments: Imaging the Moho beneath the Southeastern Suture of the Appalachian Margin Experiment (SESAME) array, SE Atlantic Coastal Plain
作者: Parker E.H. ; Jr. ; Hawman R.B. ; Fischer K.M. ; Wagner L.S.
刊名: Geophysical Research Letters
ISSN: 0094-8630
EISSN: 1944-8361
出版年: 2016
卷: 43, 期: 18 起始页码: 9627
结束页码: 9635
语种: 英语
英文关键词: Atlantic Coastal Plain
; Moho
; sediments
; southern Appalachians
; SsPmp
Scopus关键词: Buildings
; Sediments
; Velocity
; Broadband station
; Coastal plain
; Crustal thickness
; Moho
; Normal incidence
; Reflection time
; Southern appalachians
; SsPmp
; Structural geology
英文摘要: Deconvolved waveforms for two earthquakes (Mw: 6.0 and 5.8) show clear postcritical SsPmp arrivals for broadband stations deployed across the coastal plain of Georgia, allowing mapping of crustal thickness in spite of strong reverberations generated by low-velocity sediments. Precritical SsPmp arrivals are also identified. For a basement in which velocity increases linearly with depth, a bootstrapped grid search suggests an average basement velocity of 6.5 ± 0.1 km/s and basement thickness of 29.8 ± 2.0 km. Corresponding normal-incidence Moho two-way times (including sediments) are 10.6 ± 0.6 s, consistent with times for events interpreted as Moho reflections on coincident active-source reflection profiles. Modeling of an underplated mafic layer (Vp = 7.2–7.4 km/s) using travel time constraints from SsPmp data and vertical-incidence Moho reflection times yields a total basement thickness of 30–35 km and average basement velocity of 6.35–6.65 km/s for an underplate thickness of 0–15 km. ©2016. American Geophysical Union. All Rights Reserved. URL: https://www.scopus.com/inward/record.uri?eid=2-s2.0-84990251348&doi=10.1002%2f2016GL070103&partnerID=40&md5=a7009adc2820201aa1ea9f103e01b6e5
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/9593
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 Geology, University of Georgia, Athens, GA, United States
Recommended Citation:
Parker E.H.,Jr.,Hawman R.B.,et al. Estimating crustal thickness using SsPmp in regions covered by low-velocity sediments: Imaging the Moho beneath the Southeastern Suture of the Appalachian Margin Experiment (SESAME) array, SE Atlantic Coastal Plain[J]. Geophysical Research Letters,2016-01-01,43(18).