Strain rate in Paleozoic thrust sheets, the western Lachlan Orogen, Australia: Strain analysis and fabric geochronology
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Published:January 01, 2007
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David A. Foster, David R. Gray, 2007. "Strain rate in Paleozoic thrust sheets, the western Lachlan Orogen, Australia: Strain analysis and fabric geochronology", Whence the Mountains? Inquiries into the Evolution of Orogenic Systems: A Volume in Honor of Raymond A. Price, James W. Sears, Tekla A. Harms, Carol A. Evenchick
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Average orogenic strain rates may be calculated when it is possible to date mica cleavage or syndeformational veins and estimate finite strain. Deformation of accretionary-style thrust sheets in the western Lachlan Orogen occurred by chevron folding and faulting over an eastward propagating décollement. Based on 40Ar/39Ar dates of white micas, which grew below the closure temperature, this deformation started ca. 457 Ma in the west and ended ca. 378 Ma in the east, with apparent “pulses” of deformation ca. 440, 420, and 388 Ma. The 40Ar/39Ar data from thrust sheets in the Bendigo structural...
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Contents
Whence the Mountains? Inquiries into the Evolution of Orogenic Systems: A Volume in Honor of Raymond A. Price

GeoRef
- absolute age
- accretionary wedges
- Ar/Ar
- Australasia
- Australia
- back-arc basins
- basins
- clastic rocks
- cleavage
- crustal shortening
- dates
- decollement
- deformation
- depositional environment
- fabric
- faults
- folds
- foliation
- Lachlan fold belt
- Melbourne Australia
- New England Orogeny
- Ordovician
- orogenic belts
- paleoenvironment
- Paleozoic
- sedimentary rocks
- sedimentation
- strain
- structural analysis
- systems
- tectonics
- thrust sheets
- turbidite
- Upper Ordovician
- Victoria Australia
- Stawell Zone
- Bendigo structural zone