阿拉套山推覆构造的发现与初步研究

The Discovery of a Nappe Structure and Its Study in Alato Mt. s, Xinjing

本文论证了新疆阿拉套山推覆构造的存在以及形态特征。初步探讨了本区推覆构造与平移断裂系统之间的相互关系;推覆体的差异运动导致平移断层的产生,平移界定了推覆体的侧向边界。本构造推覆运动发生在古生代晚期、侏罗纪末、第三纪末。指出山前中新生代盆地的边缘为推覆体所掩盖,从而在推覆体下发现了侏罗系煤层和油气显示。为煤、油气的普查勘探提供了理论基础。

The authors expound the existence of a nappe structure and its morphological features in Alato Mts, North Xinjiang. The relationship of the nappe structure and strike—slip faults is discussed: the differential movement of the nappe results in strike-slip faults, the phorogenesis confines the lateral boundary of the nappe, the movement of the nappe took place in the late Palaeozoic, late Jurassic and late Tertiary. It is suggested that the boundary of the Mesozoic Cenozoic basin is covered with the nappe in front of the mountains. Then the Jurassic coal-seam, oil and gas are found under the nappe.