| DOI: | 10.1002/2016GL071005
|
| 论文题名: | Imaging crustal structure beneath the southern Appalachians with wavefield migration |
| 作者: | Hopper E.; Fischer K.M.; Rondenay S.; Hawman R.B.; Wagner L.S.
|
| 刊名: | Geophysical Research Letters
|
| ISSN: | 0094-8345
|
| EISSN: | 1944-8076
|
| 出版年: | 2016
|
| 卷: | 43, 期:23 | | 起始页码: | 12054
|
| 结束页码: | 12062
|
| 语种: | 英语
|
| 英文关键词: | Appalachians
; crustal root
; suture
|
| Scopus关键词: | Tectonics
; Appalachians
; Blue ridges
; Crustal root
; Crustal structure
; Generalized radon transform
; Southern appalachians
; Suture
; Velocity contrasts
; Structural geology
|
| 英文摘要: | To constrain crustal structures in the southern Appalachians and the suture zone with the Gondwanan-affinity Suwannee terrane, we applied the 2-D generalized Radon transform wavefield migration method to the scattered incident P wavefield recorded by the EarthScope Southeastern Suture of the Appalachian Margin Experiment and adjacent Transportable Array stations. We resolve the root of thickened crust beneath the high topography of the Blue Ridge Mountains and estimate its density contrast with the mantle to be only 104 ± 20 kg/m3. A weak velocity contrast across the crustal root Moho is observed and may be related to an ongoing crustal delamination event, possibly contributing to local tectonic rejuvenation. Beneath the Suwannee terrane, we confirm prior observations of a gently south-southeastward dipping crustal suture, indicating the terminal collision of Laurentia and Gondwana involved several hundred kilometers of overthrusting. ©2016. American Geophysical Union. All Rights Reserved. |
| URL: | https://www.scopus.com/inward/record.uri?eid=2-s2.0-85006761837&doi=10.1002%2f2016GL071005&partnerID=40&md5=0a2ef6adfd53e84cb72b71bd31e20c2c
|
| Citation statistics: |
|
| 资源类型: | 期刊论文
|
| 标识符: | http://119.78.100.158/handle/2HF3EXSE/9308
|
| Appears in Collections: | 科学计划与规划
气候变化与战略
|
|
There are no files associated with this item.
|
|
作者单位: | Department of Earth, Environmental and Planetary Sciences, Brown University, Providence, RI, United States
|
| Recommended Citation: | |
Hopper E.,Fischer K.M.,Rondenay S.,et al. Imaging crustal structure beneath the southern Appalachians with wavefield migration[J]. Geophysical Research Letters,2016-01-01,43(23).
|
|
|