Deformation character and palaeo-fluid flow across a wrench fault within a Palaeozoic subduction–accretion system: Waratah Fault Zone, southeastern Australia

1999 ◽  
Vol 21 (2) ◽  
pp. 191-214 ◽  
Author(s):  
David R Gray ◽  
Christoph Janssen ◽  
Yevgeny Vapnik
Keyword(s):  
Fluid Flow ◽  
Fault Zone ◽  
Southeastern Australia ◽  
Wrench Fault

Iron Oxide (U–Th)/He Thermochronology: New Perspectives on Faults, Fluids, and Heat

Elements ◽  
2020 ◽  
Vol 16 (5) ◽  
pp. 319-324
Author(s):  
Emily H. G. Cooperdock ◽  
Alexis K. Ault
Keyword(s):  
Fluid Flow ◽  
Iron Oxide ◽  
Heat Exchange ◽  
Iron Oxides ◽  
Fault Zone ◽  
Frictional Heating ◽  
Fault Zones ◽  
Chemical Behavior ◽  
Rock Interaction ◽  
Dynamic Motion

Fault zones record the dynamic motion of Earth’s crust and are sites of heat exchange, fluid–rock interaction, and mineralization. Episodic or long-lived fluid flow, frictional heating, and/or deformation can induce open-system chemical behavior and make dating fault zone processes challenging. Iron oxides are common in a variety of geologic settings, including faults and fractures, and can grow at surface-to magmatic temperatures. Recently, iron oxide (U–Th)/He thermochronology, coupled with microtextural and trace element analyses, has enabled new avenues of research into the timing and nature of fluid–rock interactions and deformation. These constraints are important for understanding fault zone evolution in space and time.

Fault zone architecture and fluid flow in interlayered basaltic volcaniclastic-crystalline sequences

2013 ◽  
Vol 51 ◽  
pp. 92-104 ◽  
Author(s):  
R.J. Walker ◽  
R.E. Holdsworth ◽  
J. Imber ◽  
D.R. Faulkner ◽  
P.J. Armitage
Keyword(s):  
Fluid Flow ◽  
Fault Zone ◽  
Fault Zone Architecture

scholarly journals Clay minerals from the Arkitsa fault gouge zone, in Central Greece, and implications for fluid flow

2017 ◽  
Vol 47 (2) ◽  
pp. 616 ◽  
Author(s):  
D. Papoulis ◽  
D. Romiou ◽  
S. Kokkalas ◽  
P. Lampropoulou
Keyword(s):  
Fluid Flow ◽  
Clay Minerals ◽  
Fault Zone ◽  
Damage Zone ◽  
Fault Gouge ◽  
Hydrothermal Conditions ◽  
Core Zone ◽  
Damage Area ◽  
Central Greece ◽  
Alkaline Conditions

Clay minerals in shallow fault rocks are increasingly recognized as key to the mechanical and seismogenic behavior of faults and fluid flow circulation within the fault core and the surrounding damage zone. We therefore studied faultgouge mineralogy from samples derived from the ENE-trending Arkitsa fault zone, in east-central Greece, in order to testify if the fault is acting as a channel for fluid flow and whether the conditions that characterize the flow can be identified. Clay-gouge samples were collected within the fault core zone, as well as in the broader fault damage area. Consequently, the samples were analyzed by X-Ray Diffraction, SEM and Electron microprobe analyses. The minerals that were identified within the centre of the fault zone are: Montmorillonite, corrensite, illite, micro-calcite, dolomite, quartz, plagioclase and K-feldspars. The absence of corrensite, a clay mineral usually formed in hydrothermal conditions, in the samples from the broader fault damage area indicates that the circulation of hydrothermal fluids is mostly confined within and around the fault core zone. The assemblages within the fault gouge zone and especially the presence of corrensite, combined with the absence of laumontite, indicate hydrothermal alteration at neutral to alkaline conditions and a temperature range at about 100-150 oC.

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