新疆北部石炭系构造背景及演化

新疆北部石炭系洋陆转换过渡期，经历了以下两个演化阶段：早石炭世碰撞间歇期伸展－残留洋闭合、陆-陆碰撞阶段和晚石炭世碰撞期后伸展垮塌－板内变形作用阶段。根据石炭世的板块构造活动背景分析，结合区域构造－沉积岩石组合，初步拟定新疆北部早石炭世原型盆地类型主要包括5类：残留洋、陆缘坳陷、裂陷槽、裂谷、陆内坳陷；晚石炭世原型盆地可简要分为３类：裂陷槽、陆缘坳陷、裂谷或断陷。根据上石炭统原型盆地后期叠加改造特征，将新疆北部现今保存在覆盖区内的上石炭统残留盆地及其叠加改造类型分为两大类六亚类：首先根据是否存在二叠系分为继承型和叠加型两大类，然后再根据中生代及新生代盆地叠加特征分为五亚类，分别为连续继承型、早继承早叠加型、早继承晚叠加型、三叠系叠加型、侏罗系叠加型及白垩系叠加型。

Tectonic Background and Evolution of Carboniferous in the North of Xinjiang

The ocean- continent transition period of the Carboniferous system in the north of Xinjiang has experienced the following two evolvement stages: stretch in the collision diapause--- closure of remnant ocean stage and collision stage between continent and continent in the early Carboniferous, and stretch collapse---deformation stage inside the plate after the collision at the late Carboniferous. According to the plate structure activity background of Carboniferous and combining the regional structure---sedimentary rock structure, it makes analysis and initially draws up that the types of the early Carboniferous prototype basin in the north of Xinjiang mainly include five categories: Remnant Ocean, epicontinental sinking, taphrogenic trough, rift valley and intracontinental sinking; the late Carboniferous prototype basins can be briefly divided into three categories: taphrogenic trough, epicontinental sinking and rift valley or rupture. According to the superposition alteration features at later stage of the Upper Carboniferous prototype basins, it can divide the Upper Carboniferous remnant basins and their superposition alteration categories which are preserved in the north of Xinjiang nowadays into two main types and six subtypes: above all, they can be divided into inheritance model and superposition model based on whether there is Permian system. Then according to the superposition features of Mesozoic and Cenozoic basins, they can be divided into five subtypes, which are successive inheritance model, early inheritance and early superposition model, early inheritance and late superposition model, Trias superposition model, Jurassic superposition model and cretaceous superposition model.