DOI: 10.1016/j.earscirev.2019.05.008
论文题名: Graphitic material in fault zones: Implications for fault strength and carbon cycle
作者: Cao S. ; Neubauer F.
刊名: Earth Science Reviews
ISSN: 00128252
出版年: 2019
卷: 194 起始页码: 109
结束页码: 124
语种: 英语
中文关键词: Carbon cycle
; Fault zone
; Fluid
; Graphitic material
; Lubrication
; Stable carbon isotopes
英文关键词: carbon cycle
; carbon isotope
; crustal structure
; fault zone
; faulting
; lithosphere
; stable isotope
; tectonic plate
英文摘要: The study discusses the presence, formation and destruction of graphitic material in fault rocks of exhumed fault zones. Because of the low strength, the presence of lubricating graphitic material along fault zones has important implications for understanding tectonic movements in various crustal levels. Fault zones are permeable for ascending and descending fluids and represent, therefore, effective pathways of fluids between deep lithospheric levels and Earth's surface, and this plumbing system is part of the carbon exchange system of the global carbon cycle between deep lithosphere and atmosphere. Processes of formation, structure and microfabrics of the graphitic material and the implications for the global carbon cycle in natural fault zones are still poorly understood. This paper gives an overview on the range of the origin of graphitic material along fault zones (e.g. organic vs. carbonatic vs. fluid origin) and its physical formation and destruction mechanisms. The presence of graphitic carbon permits: (1) to recognize faults with graphitic lubricants during faulting and allow assess, therefore, crustal strength over various temporal and spatial scales, (2) how carbon-bearing material is moving through the fault zone hence recording the complex structural history, (3) how carbon represents a monitor of fluid transport through fault zones, and (4) how graphitic material allow to pinpoint peak temperature conditions of the faulting process. The data implies also carbon transfer between depth and surface, which contributes to the global carbon cycle, but to a hitherto unknown extent. The presence of graphitic carbon in fault rocks has also implications on fault mechanics, engineering geology, nuclear waste repositories and assessment of seismic hazard. © 2019 Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/165776
Appears in Collections: 气候变化与战略
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作者单位: State Key Laboratory of Geological Processes and Mineral Resources, Center for Global Tectonics and School of Earth Sciences, China University of Geosciences, Wuhan, 430074, China; Dept. of Geography and Geology, Paris-Lodron-University of Salzburg, Hellbrunnerstr. 34, Salzburg, A-5020, Austria
Recommended Citation:
Cao S.,Neubauer F.. Graphitic material in fault zones: Implications for fault strength and carbon cycle[J]. Earth Science Reviews,2019-01-01,194