吉林省辉南地区含金韧性剪切带的构造地质特征

The Structural Characteristics of Geology in Auriferous Ductile Shear Zone, Huinan, Jilin

吉林省辉南地区韧性剪切带岩石变形特征复杂多样。通过对剪切带内岩石的有限应变测量和变形环境的分析 ,认为本区韧性剪切带发育在地壳浅层次的低温低压环境 ,为逆冲推覆韧性变形 ,其变形变质作用相当于低绿片岩相 ,具有独特的构造组合和岩石变形特征 ,差异应力值为 45～ 54MPa,剪切位移量约为 1 2 .5km ,形成时间为中元古宙。

The characteristics of geology and rock deformation were analyzed in the ductile shear zone in Huinan, Jilin province. Also the finite strain measurement and the fractal theory to entironment of deformation were applyed in the thesis. It is proved that the ductile shear zone is developed in a low temperature and pressure environment in the low level crust,belonging to a thrusting overridding shear deformation. And its metamorphism and deformation process are equivalent to low greenschist facies, and characterize specific stuctural assemblage and distortion of rocks. Its differential stress value is 45～50 MPa, and displacement of the ductile shear zone is 12.5 km, which formed in the mesoprotezoic.