| DOI: | 10.1002/grl.50732
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| 论文题名: | Using core complex geometry to constrain fault strength |
| 作者: | Choi E.; Buck W.R.; Lavier L.L.; Petersen K.D.
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| 刊名: | Geophysical Research Letters
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| ISSN: | 0094-8702
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| EISSN: | 1944-8433
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| 出版年: | 2013
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| 卷: | 40, 期:15 | | 起始页码: | 3863
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| 结束页码: | 3867
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| 语种: | 英语
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| 英文关键词: | core complex
; fault strength
; large-offset normal fault
; rider block
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| Scopus关键词: | Core complex
; Fault strength
; High resolution simulations
; Lithospheric extension
; Metamorphic core complex
; Normal faults
; Oceanic core-complexes
; rider block
; Geophysics
; Earth sciences
; detachment fault
; fault propagation
; friction
; metamorphism
; numerical model
; simulation
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| 英文摘要: | We present the first model results showing that some core complex detachment faults are strong and that their strength has to be in a narrow range to allow certain extensional structures to develop. The structures we simulate are kilometer-scale "rider blocks" that are particularly well observed on some oceanic core complexes as well as continental metamorphic core complexes. Previous numerical simulations of lithospheric extension produced the large-offset, core complex-forming, normal faults only when the faults were weaker than a given threshold. However, our new, high-resolution simulations indicate that rider blocks only result when the faults are stronger than a given level. A narrow range of fault weakening, relative to intact surrounding rock, allows for a consecutive series of rider blocks to emerge in a core complex-like geometry. Our results show that rider blocks develop when the dominant form of weakening is by reduction of fault cohesion while faults that weaken primarily by friction reduction do not form distinct rider blocks. © 2013. American Geophysical Union. All Rights Reserved. |
| URL: | https://www.scopus.com/inward/record.uri?eid=2-s2.0-84881162847&doi=10.1002%2fgrl.50732&partnerID=40&md5=06a2ae4c05769989fc832edb9801eba8
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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/5966
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| Appears in Collections: | 气候减缓与适应
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作者单位: | Center for Earthquake Research and Information, University of Memphis, 3890 Central Ave., Memphis, TN 38152, United States
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| Recommended Citation: | |
Choi E.,Buck W.R.,Lavier L.L.,et al. Using core complex geometry to constrain fault strength[J]. Geophysical Research Letters,2013-01-01,40(15).
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