DOI: 10.1016/j.epsl.2018.09.016
Scopus记录号: 2-s2.0-85054012018
论文题名: Multi fluid-flow record during episodic mode I opening: A microstructural and SIMS study (Cotiella Thrust Fault, Pyrenees)
作者: Lacroix B. ; Baumgartner L.P. ; Bouvier A.-S. ; Kempton P.D. ; Vennemann T.
刊名: Earth and Planetary Science Letters
ISSN: 0012821X
出版年: 2018
卷: 503 起始页码: 37
结束页码: 46
语种: 英语
英文关键词: clumped isotope
; fault
; fluid inclusion
; oxygen isotope
; veins
Scopus关键词: Deformation
; Faulting
; Isotopes
; Mineralogy
; Secondary emission
; Secondary ion mass spectrometry
; Clumped isotopes
; Fluid composition
; Fluid inclusion
; Fluid inclusion microthermometry
; Oxygen isotopes
; Syn-tectonic veins
; Temperature conditions
; veins
; Flow of fluids
英文摘要: Syntectonic veins commonly have been used to assess the composition and source of fluids involved in fault zone activity. Such veins also provide information on the ambient stress conditions during deformation and mineralization. Based on bulk sampling and bulk O- and C-isotope analysis, combined with fluid inclusion microthermometry, many studies have demonstrated that syntectonic veins provide snapshots of fluid composition and stress conditions over the course of fault history. This is widely acknowledged for mode I extension veins that develop in the damage zones of faults. However, an important and unanswered question is the extent to which such veins record a more detailed fault history at the micron scale. In this study, we present new detailed in-situ micron-scale δ18O data, measured using Secondary Ion Mass Spectrometry (SIMS), combined with detailed fluid inclusion microthermometry and Δ47 clumped isotope thermometry to document the fluid and temperature conditions during mode I vein growth related to deformation along the Cotiella thrust fault (Pyrenees). All the studied veins show three distinct episodes of vein opening, recording a complex history of varying fluid composition and temperature. Results show that the studied fault portion passed from a hydrological rock-buffered system, in which formation waters were in isotopic equilibrium with the host sediments, to a fluid-buffered system involving meteoric water. However, such information is only achievable at the micron scale using Secondary Ion Mass Spectrometry. This study demonstrates the potential of these new micro-beam techniques for investigating fault behavior in more detail than previously available, particularly with respect to the nature of the fluids involved and the P–T conditions extant during fault activity. © 2018 Elsevier B.V. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/109610
Appears in Collections: 影响、适应和脆弱性 气候变化事实与影响
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作者单位: Department of Geology, Kansas State University, Manhattan, KS 66503, United States; Institute of Earth Sciences, University of Lausanne, Géopolis, Lausanne, 1015, Switzerland; Université de Lausanne, Lausanne, Switzerland; Institute of Earth Surface Dynamics, University of Lausanne, Géopolis, Lausanne, 1015, Switzerland
Recommended Citation:
Lacroix B.,Baumgartner L.P.,Bouvier A.-S.,et al. Multi fluid-flow record during episodic mode I opening: A microstructural and SIMS study (Cotiella Thrust Fault, Pyrenees)[J]. Earth and Planetary Science Letters,2018-01-01,503