The Woka ductile shear zone is located at the southern margin of the middle section of the Gangdese magmatic belt and southeast of Lhasa. This article is a systematic study of the Woka ductile shear zone and provides kinematics, strain patterns, rheology, temperature environment, and geochronological data of the shear zone, which have great significance for understanding of the uplift and extension process of the southern section of the Gangdese. All shear indicators, such as asymmetrical folds, rotated porphyroclasts, and S–C fabrics, developed in the shear zone indicate the shear sense of top‐to‐the‐northwest with the shear nature of detachment. Mineral deformation thermometer and EBSD quartz fabric analysis indicate that the shear zone has experienced early high‐temperature (550–650°C) deformation and post‐superimposed low temperature (380–420°C) deformation. The differential stress (σ) of the ductile shear zone was 28.08–46.73 MPa. Strain rates (έ) ranged from 10⁻¹⁰ to 10⁻¹⁴ s⁻¹ under a high‐temperature environment (600°C) and 10⁻¹² to 10⁻¹⁶ s⁻¹ under a low‐temperature environment (420°C). Three‐dimensional strain ellipsoid measurements of the Woka ductile shear zone indicate that all deformed samples appear as prolate ellipsoids (LS‐type tectonites), which represent an elongate strain. The average kinematic vorticity of the Woka ductile shear zone is 0.93, implying that the shear zone was dominated by simple shear. The thickness of the ductile shear zone was reduced by 12–28%. Combined with the U–Pb zircon age of the protolith of granitic protomylonite, the ⁴⁰Ar/³⁹Ar sericite age of granitic mylonite (22.38 ± 0.31 Ma) can represent the shear age. The Woka shear zone studied in this article may have been formed by the Great Counter Thrust (GCT) activity and uplift of the Gangdese batholith during the transforming period of the Lhasa Terrane from extrusion to a lateral extension.

中文翻译：

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沃卡韧性剪切带的运动学，应变模式，流变学和年代学：冈底斯岩基抬升和大逆冲活动的产物

沃卡韧性剪切带位于冈底斯岩浆带中段的南部边缘和拉萨东南部。本文是对沃卡韧性剪切带的系统研究，提供了剪切带的运动学，应变模式，流变学，温度环境和年代学数据，对于了解南部隆升和伸展过程具有重要意义。帮派 在剪切带上发育的所有剪切指示剂，例如不对称褶皱，旋转的卟啉纤维和S-C织物，都具有从上到西北的剪切感，具有分离的剪切性质。矿物变形温度计和EBSD石英织物分析表明，剪切带经历了早期的高温（550–650°C）变形和叠加后的低温（380–420°C）变形。韧性剪切带的应力差（σ）为28.08-46.73 MPa。应变率（έ）为10高温环境（600°C）下^-10至10 ^-14 s ^-1，低温环境（420°C）上10 ^-12至10 ^-16 s ^-1。Woka延性剪切带的三维应变椭球测量表明，所有变形样品均表现为长椭球（LS型构造体），代表细长应变。沃卡延性剪切带的平均运动涡度为0.93，这表明剪切带以简单剪切为主。韧性剪切区的厚度减少了12–28％。结合花岗岩原生质子岩原石的U–Pb锆石年龄⁴⁰ Ar / ³⁹花岗岩类绢云母的Ar绢云母年龄（22.38±0.31 Ma）可以代表剪切年龄。本文研究的Woka剪切带可能是由于拉萨大地带从挤压到横向伸展的转换期间大逆冲（GCT）活动和冈底斯岩基岩的隆升形成的。