TY - JOUR
T1 - Timing of gold mineralisation in the western Lachlan Orogen, SE Australia: A critical overview
AU - Phillips, David
AU - Fu, Bin
AU - Wilson, Christopher
AU - Kendrick, Mark
AU - Fairmaid, Aillison
AU - Miller, John
PY - 2012
Y1 - 2012
N2 - The western sub-province of the Paleozoic Lachlan Orogen in Victoria is dominated by thick turbidite sequences overlying Cambrian basement volcanics. The region was subjected to multiple Cambrian to Late Devonian regional deformation events, followed by extensive post-tectonic granitic magmatism. The western Lachlan Orogen is considered a typical orogenic gold province and hosts a large number of goldfields, including the world-class Bendigo-Ballarat goldfields. A variety of geochronological methods (e. g. U-Pb zircon; Re-Os sulfide; Ar-40/Ar-39 whole-rock, mica) have been used to constrain the timing of gold mineralisation, and the relationship to metamorphism/deformation/magmatism. Regional granitic magmatism is relatively well constrained from U-Pb zircon dating, with the timing of deformation/metamorphism and gold mineralisation reliant largely on Ar-40/Ar-39 dating results. Owing to inconsistencies in the available Ar-40/Ar-39 data and recent revisions to Ar-40/Ar-39 monitor ages and decay constants, we recalculate and re-evaluate all existing Ar-40/Ar-39 age results.
AB - The western sub-province of the Paleozoic Lachlan Orogen in Victoria is dominated by thick turbidite sequences overlying Cambrian basement volcanics. The region was subjected to multiple Cambrian to Late Devonian regional deformation events, followed by extensive post-tectonic granitic magmatism. The western Lachlan Orogen is considered a typical orogenic gold province and hosts a large number of goldfields, including the world-class Bendigo-Ballarat goldfields. A variety of geochronological methods (e. g. U-Pb zircon; Re-Os sulfide; Ar-40/Ar-39 whole-rock, mica) have been used to constrain the timing of gold mineralisation, and the relationship to metamorphism/deformation/magmatism. Regional granitic magmatism is relatively well constrained from U-Pb zircon dating, with the timing of deformation/metamorphism and gold mineralisation reliant largely on Ar-40/Ar-39 dating results. Owing to inconsistencies in the available Ar-40/Ar-39 data and recent revisions to Ar-40/Ar-39 monitor ages and decay constants, we recalculate and re-evaluate all existing Ar-40/Ar-39 age results.
UR - http://www.tandfonline.com/loi/taje20
U2 - 10.1080/08120099.2012.682738
DO - 10.1080/08120099.2012.682738
M3 - Article
SN - 0812-0099
VL - 4
SP - 495
EP - 525
JO - Australian Journal of Earth Sciences
JF - Australian Journal of Earth Sciences
ER -