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东天山大型韧性剪切带即秋格明塔什-黄山韧性剪切带,规模宏大,东西长逾600km,宽5~20km。变形标志明显,分四期变形。应变测量、岩组分析、剪切位移量计算、同位素测年等定量分析表明:①以平面单剪应变为主,稍晚向伸长应变转化;②存在逆冲剪切和脆-韧性变形转换;③剪切位移量在75km以上;④变形时代在300~250Ma之间,高峰期在285~265Ma,属海西中晚期。它是康-黄断裂带的重要组成体,控制着康古尔塔格金矿带的空间展布。据现有大中型金矿研究建立了区域脆-韧性变形转换带结构模式和金矿预测模式,可有效指导找矿勘探。
The East Tianshan large-scale ductile shear zone, the autumn gemtut-Huangshan ductile shear zone, is large in scale and has a length of 600 km and a width of 5 to 20 km. Distortion mark is obvious, divided into four stages of deformation. The quantitative analysis of strain measurement, analysis of rock group, calculation of shear displacement and dating of isotopes show that: ① the plane shear strain is the main one and the transition to elongation strain is slightly later; ② the thrust shear and brittle-ductile deformation transformation exist ; ③ shear displacement in more than 75km; ④ deformation age between 300 ~ 250Ma, peak at 285 ~ 265Ma, is a Hercynian late. It is an important component of the Kang-Huang fault zone and controls the spatial distribution of the Kanggurtag gold belt. According to the existing large and medium-sized gold deposits, a regional brittle-ductile deformation transformation zone structural model and a gold ore prediction model have been established, which can effectively guide exploration and prospecting.