| DOI: | 10.1002/2014GL060433
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| 论文题名: | Brittle-viscous deformation, slow slip, and tremor |
| 作者: | Fagereng Å.; Hillary G.W.B.; Diener J.F.A.
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| 刊名: | Geophysical Research Letters
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| ISSN: | 0094-10022
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| EISSN: | 1944-9753
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| 出版年: | 2014
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| 卷: | 41, 期:12 | | 起始页码: | 4159
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| 结束页码: | 4167
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| 语种: | 英语
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| Scopus关键词: | Creep
; Fault slips
; Quartz
; Sedimentary rocks
; Shear strain
; Silicates
; Brittle deformation
; Brittle failures
; Dislocation creep
; Earthquake slip
; Effective stress
; Geophysical observations
; Strain partitioning
; Viscous deformation
; Strain rate
; brittle deformation
; dislocation
; metapelite
; oceanic crust
; phyllosilicate
; quartz vein
; sedimentary rock
; shear strain
; slip rate
; viscous flow
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| 英文摘要: | Geophysical observations have illuminated a spectrum of fault slip styles from continuous aseismic sliding to fast earthquake slip. We study exhumed intercalated lenses of oceanic crust and sedimentary rocks, deformed to high shear strains. Deformation was partitioned between fractured, rigid blocks, with lengths of tens to hundreds of meters, and surrounding metapelites characterized by interconnected phyllosilicate networks. Under inferred conditions of low effective stress at temperatures > 500°C, locally and transiently elevated shear strain rate in phyllosilicates deforming by dislocation creep can reach those needed for transient slow slip. Concurrently, increased matrix strain rate likely stimulates brittle failure in rigid lenses. The ubiquitous presence of quartz veins and microfractures within rigid material provides evidence for brittle deformation occurring coincident with viscous shearing flow. We suggest that geophysically observed tremor and slow slip may be a manifestation of strain partitioning, where deformation is accommodated viscously in a matrix enveloping rigid lenses. © 2014. American Geophysical Union. All Rights Reserved. |
| URL: | https://www.scopus.com/inward/record.uri?eid=2-s2.0-84907943894&doi=10.1002%2f2014GL060433&partnerID=40&md5=115fa2e097aabcb383bc21dddd85b6b4
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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/7286
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| Appears in Collections: | 气候减缓与适应
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作者单位: | Department of Geological Sciences, University of Cape Town, Cape Town, South Africa
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| Recommended Citation: | |
Fagereng Å.,Hillary G.W.B.,Diener J.F.A.. Brittle-viscous deformation, slow slip, and tremor[J]. Geophysical Research Letters,2014-01-01,41(12).
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