| DOI: | 10.1002/2014GL061555
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| 论文题名: | Sedimentation rates test models of oceanic detachment faulting |
| 作者: | Parnell-Turner R.; Cann J.R.; Smith D.K.; Schouten H.; Yoerger D.; Palmiotto C.; Zheleznov A.; Bai H.
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| 刊名: | Geophysical Research Letters
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| ISSN: | 0094-9697
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| EISSN: | 1944-9428
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| 出版年: | 2014
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| 卷: | 41, 期:20 | | 起始页码: | 7080
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| 结束页码: | 7088
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| 语种: | 英语
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| 英文关键词: | detachment faulting
; mid-ocean ridge
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| Scopus关键词: | Sediments
; Structural geology
; Surveys
; Tectonics
; Corrugated surfaces
; Detachment faulting
; Mid Atlantic Ridge
; Mid-ocean ridges
; Mid-oceanic ridges
; Sediment distribution
; Sediment thickness
; Sedimentation rates
; Faulting
; data set
; faulting
; mid-ocean ridge
; numerical model
; oceanic crust
; plate tectonics
; reconstruction
; sedimentation
; tectonic structure
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| 英文摘要: | Long-lived detachment faults play an important role in the construction of new oceanic crust at slow-spreading mid-oceanic ridges. Although the corrugated surfaces of exposed low-angle faults demonstrate past slip, it is difficult to determine whether a given fault is currently active. If inactive, it is unclear when slip ceased. This judgment is crucial for tectonic reconstructions where detachment faults are present, and for models of plate spreading. We quantify variation in sediment thickness over two corrugated surfaces near 16.5°N at the Mid-Atlantic Ridge using near-bottom Compressed High Intensity Radar Pulse (CHIRP) data. We show that the distribution of sediment and tectonic features at one detachment fault is consistent with slip occurring today. In contrast, another corrugated surface 20-km to the south shows a sediment distribution suggesting that slip ceased ∼150,000-years ago. Data presented here provide new evidence for active detachment faulting, and suggest along-axis variations in fault activity occur over tens of kilometers. Key Points Near-bottom AUV surveys of detachment faulting at Mid-Atlantic RidgeSediment distribution distinguishes active from non-active faultsVariation in timing of slip quantified between two surveys ©2014. American Geophysical Union. All Rights Reserved. |
| URL: | https://www.scopus.com/inward/record.uri?eid=2-s2.0-84911432569&doi=10.1002%2f2014GL061555&partnerID=40&md5=41aa2d876e6fcdfe4c1ddc651cc0e137
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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/6961
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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 Sciences, University of Cambridge, Cambridge, United Kingdom
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| Recommended Citation: | |
Parnell-Turner R.,Cann J.R.,Smith D.K.,et al. Sedimentation rates test models of oceanic detachment faulting[J]. Geophysical Research Letters,2014-01-01,41(20).
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