DOI: 10.1002/2014GL061715
论文题名: Modeling episodic fluid-release events in the ductile carbonates of the Glarus thrust
作者: Poulet T. ; Veveakis M. ; Herwegh M. ; Buckingham T. ; Regenauer-Lieb K.
刊名: Geophysical Research Letters
ISSN: 0094-9705
EISSN: 1944-9436
出版年: 2014
卷: 41, 期: 20 起始页码: 7121
结束页码: 7128
语种: 英语
英文关键词: carbonate oscillator
; chemical shear zone
; Glarus thrust
; mylonites
Scopus关键词: Carbonates
; Carbonation
; Decomposition
; Deformation
; Slip forming
; Stick-slip
; Carbonate decomposition
; Chemical decomposition
; Creep deformations
; Ductile deformations
; Glarus thrust
; Mylonites
; Pressurized fluids
; Shear zone
; Creep
; carbonate
; decomposition
; deformation
; fluid
; mylonite
; numerical model
; thrust
; Glarus [Switzerland]
; Switzerland
英文摘要: The exposed Glarus thrust displays midcrustal deformation with tens of kilometers of displacement on an ultrathin layer, the principal slip zone (PSZ). Geological observations indicate that this structure resulted from repeated stick-slip events in the presence of highly overpressured fluids. Here we show that the major characteristics of the Glarus thrust movement (localization, periodicity, and evidence of pressurized fluids) can be reconciled by the coupling of two processes, namely, shear heating and fluid release by carbonate decomposition. During this coupling, slow ductile creep deformation raises the temperature through shear heating and ultimately activates the chemical decomposition of carbonates. The subsequent release of highly overpressurized fluids forms and lubricates the PSZ, allowing a ductile fault to move tens of kilometers on millimeter-thick bands in episodic stick-slip events. This model identifies carbonate decomposition as a key process for motion on the Glarus thrust and explains the source of overpressured fluids accessing the PSZ. Key Points Oscillating brittle-ductile deformation processes explained by energy feedbackMultiscale time-space observations in the Glarus thrust explained by one modelThe Glarus thrust exposes spatial patterns of episodic fluid-release slip events ©2014. American Geophysical Union. All Rights Reserved. URL: https://www.scopus.com/inward/record.uri?eid=2-s2.0-84911401128&doi=10.1002%2f2014GL061715&partnerID=40&md5=c3b6246777dbea7c7f14fae9d5e1d576
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/6969
Appears in Collections: 气候减缓与适应
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作者单位: CSIRO Mineral Resources, Bentley, WA, Australia
Recommended Citation:
Poulet T.,Veveakis M.,Herwegh M.,et al. Modeling episodic fluid-release events in the ductile carbonates of the Glarus thrust[J]. Geophysical Research Letters,2014-01-01,41(20).