【摘要】 塔北地区包括库车前陆盆地和塔北前陆克拉通地区两大变形带。在库车前陆盆地,垂向上,主要受滑脱层发育及其展布、构造地层组合及岩层埋深等因素控制,深层一般为被动顶板双冲构造及断弯褶皱,中层为三角带、冲起构造,浅层为断展、滑脱及底辟褶皱;横向上,与挤压应力大小、地层岩石力学性质、滑脱层发育程度等相关,自造山带前缘向前陆克拉通方向,褶皱一般由紧闭、不对称或倒转变为平缓、开阔,并由断弯、断展褶皱变为滑脱褶皱;变形程度由强变弱;变形层次由深变浅。在前陆克拉通地区,主要受岩石力学性质、多层次滑脱、先存构造格局和挤压应力大小控制,深层一般为基底卷入型逆冲断层及其相关褶皱,中层为盖层滑脱型断展褶皱、低幅度滑脱背斜、滑脱-底辟背斜、冲起构造,浅层为披覆-生长背斜;由近造山带一侧趋向克拉通内部,构造样式一般由基底卷入型断层及其相关褶皱→盖层滑脱型构造→基底翘曲构造。更多还原

【Abstract】 Based on field investigation, reflecting seismic profiles and other data, deformation style and its distribution in North Tarim basin, NW China, are discussed in this paper. North Tarim basin includes Kuche foreland basin thin-skinned deformation zone and foreland cratonic deformation zone in which thick-skinned(basement - involved)deformation dominates, thin-skinned deformation ranks second. Vertical and lateral variation of deformation style in Kuche foreland basin are controlled by the occurrence of detachment layers, tectono-stratigraphic units and the change of compressive stress magnitude. In foreland cratonic region, the distribution of deformation style is controlled by lithomechanical property, decoupling or detachment surfaces, pre-existed tectonic framework and compressive stress magnitude.更多还原