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Archean mesothermal gold mineralization is commonly located in brittle-ductile structures active during the late deformation events of greenstone belt evolution, and in several cases, reactivation of earlier, mechanically weak structures was a controlling factor. Intensely mineralized greenstone belts in both Western Australia and southern Africa are characterized by an early compressional to oblique-compressional event. Within these belts, zones of low-strain greenstones are bounded by narrow high-strain zones of up to hundreds of kilometers in strike length, which are in turn linked to the brittle-ductile structures hosting gold mineralization. This structural pattern ensured that there was strongly focused fluid flux...

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