DOI: 10.1002/2015GL063437
论文题名: Brittle versus ductile deformation as the main control of the deep fluid circulation in oceanic crust
作者: Violay M. ; Gibert B. ; Mainprice D. ; Burg J.-P.
刊名: Geophysical Research Letters
ISSN: 0094-8768
EISSN: 1944-8499
出版年: 2015
卷: 42, 期: 8 起始页码: 2767
结束页码: 2773
语种: 英语
英文关键词: brittle to ductile transition
; deformation
; dilatancy
; hydrothermal circulation
; porosity
Scopus关键词: Basalt
; Heat transfer
; Porosity
; Strain rate
; Brittle to ductile transition
; Constant strain rate
; Dilatancy
; Ductile deformations
; Hydraulic properties
; Hydrothermal circulation
; Hydrothermal fluids
; Micro-structural observations
; Deformation
; brittle deformation
; ductile deformation
; fluid flow
; heat transfer
; microstructure
; oceanic crust
; pore pressure
; strain rate
英文摘要: The brittle to ductile transition may strongly influence hydraulic properties of rocks at the depth and temperature ranges that hydrothermal fluids circulate. To examine this transition in the context of the oceanic crust, we conducted a series of deformation experiments on a natural basalt sample at in situ oceanic crust conditions. Dilatancy was measured during deformation. The method consisted in monitoring the volume of pore fluid that flows into or out of the sample at constant pore pressure. Mechanical and microstructural observations at experimental constant strain rate of 10-5 s-1 indicated that the basalt was brittle and dilatant up to 800°C. At higher temperature, the deformation mode became macroscopically ductile and samples compacted. These observations have important implications on heat transfer and fluid migration in oceanic crust. ©2015. American Geophysical Union. All Rights Reserved. URL: https://www.scopus.com/inward/record.uri?eid=2-s2.0-84929520173&doi=10.1002%2f2015GL063437&partnerID=40&md5=ca61cede3646d3c64f0ff9596aa1144a
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/8384
Appears in Collections: 科学计划与规划 气候变化与战略
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作者单位: D-ERDW, ETH, Zürich, Switzerland
Recommended Citation:
Violay M.,Gibert B.,Mainprice D.,et al. Brittle versus ductile deformation as the main control of the deep fluid circulation in oceanic crust[J]. Geophysical Research Letters,2015-01-01,42(8).