论文部分内容阅读
横跨天山的中天山北缘断裂带是中亚地区一个重要构造单元,新疆的阿齐克库都格-尾亚断裂带是其重要的组成部分。走向近东西,宽约30 km,延伸1000 km以上。主要由绿片岩化和糜棱岩化的早古生代杂砂岩、火山岩、含高压变质岩的蛇绿混杂岩和新元古代片岩、片麻岩、花岗片麻岩等组成。二叠纪的红色磨拉石不整合覆盖在这些变质变形的岩石之上。笔者研究表明,这是一个古生代的大型韧性剪切带。广泛发育于该带的近直立糜棱面理和近水平拉伸线理确定了其走滑性质,各种运动学标志如不对称褶皱、小型—显微尺度的非同轴不对称剪切组构、糜棱岩中石英的C轴组构等标定这是一个近东西走向的右旋走滑韧性剪切带。部分地段沿该带两侧具有逆冲和挤出成分,以花状构造和枢纽平缓的直立褶皱为特征,反映
The fault zone along the northern margin of the Tianshan Mountains across Tianshan Mountains is an important tectonic unit in Central Asia. The Azhiku-Dugu-Tau sub-fault zone in Xinjiang is an important component. To the east-west, 30 km wide, extending more than 1000 km. Mainly by the greenschist and mylonized Early Paleozoic miscellaneous sandstone, volcanic rocks, high-pressure metamorphic rocks containing ophiolites and Neoproterozoic schist, gneiss, granite gneiss and other components. Permian red molasse unconsolidated over these metamorphic rocks. The author studies show that this is a Paleozoic large ductile shear zone. The strike-slip properties of the near-standing mylonitic and near-horizontal extensional strata widely developed in the belt are determined by various kinematic markers such as asymmetric folds, small-scale non-coaxial asymmetric shear groups Structure, mylonitial quartz C-axis structure and other calibration This is a nearly east-west strike-slip ductile shear zone. Some sections have thrusting and extruding components along both sides of the belt, featuring flower-shaped structures and upright folds with gentle hubs, reflecting