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ductile shear zone
Fluid participation in ductile shear zone: Evidence from geological, geochemical and13O/16O relations from south part of Tanchen
      
The large-scale ductile shear zone in Kuda, western Kunlun
      
Jingshan superlarge gold deposit is a typical deposit closely related to the ductile shear zone, developing the economic enrichment during the transition form the ductile deformation to the brittle deformation.
      
40Ar/39Ar geochronology and exhumation of mylonitized metamorphic complex in Changle-Nanao ductile shear zone
      
The40Ar/39 Ar plateau ages, K-Ar date of K-feldspar and other geochronologic information suggest that the exhumation rate of the ductile shear zone is about 0.18-1.12 mm/a in the range of 107-70 Ma, which is mainly influenced by tectonic extension.
      
A planar deformation analysis of this kind of ductile shear zone is carried out with the polar Mohr diagram.
      
Strain and shear types of the Louzidian ductile shear zone in southern Chifeng, Inner Mongolia, China
      
The Louzidian ductile shear zone at the south of Chifeng strikes NE-SW and dips SE at low-medium-angles.
      
This ductile shear zone is mainly composed of granitic mylonite, which grades structurally upward into a chloritized zone, a microbreccia zone, a brittle fault and a gouge zone.
      
These kinds of shear types only produce a/ab strain facies, so the lineation in the ductile shear zone could not deflect 90° in the progressively deformation.
      
The present profile of the ductile shear zone with consistent SW-dipping mineral elongation lineation shows antiform and reversed S-shape from northeast to southwest respectively.
      
Exposure structures, microstructures and quartz C-axis fabric all indicate top-to-SW movement for the ductile shear zone.
      
Intrusion of the Hongzhen granite with a biotite plateau age of 124.8±1.2 Ma rendered the ductile shear zone curved, uplifted and final localization of the core complex.
      
When brittle structures were formed locally in the ductile shear zone, the ore-forming fluids migrated to the structures along microfractures, and preciptated auriferous quartz because of reduction of pressure and temperature.
      
The Hetai gold deposit in Guangdong Province, for example, is a mylonite-type gold deposit in a ductile shear zone.
      
Study on the physical and chemical conditions of ore formation of Hetai ductile shear zone-hosted gold deposit and discovery of
      
The Hetai ductile shear zone-hosted gold deposit occurs in the deep-seated fault mylonite zone of the Sinian-Silurian metamorphic rock series.
      
The Hongshijing gold deposit, which occurs in the Middle and Late Carboniferous volcanic and pyroclastic rocks, is of the brittle-ductile shear zone type controlled by a rift belt.
      
The Koktokay-Ertai fault zone was developed on the basis of a former ductile shear zone (mylonite zone).
      
The Amesmessa gold prospect is located along a vertical N-S-trending crustal-scale ductile shear zone; stretching lineations are subhorizontal.
      
 

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