中国中西部地区关键构造变革期次及变形特征

Tectonic evolution stages and deformation characteristics in central and western China

杨帆 胡烨 罗开平 李风勋 潘文蕾 曹清古 陆永德

YANG Fan HU Ye LUO Kaiping LI Fengxun PAN Wenlei CAO Qinggu LU Yongde

中国石化 石油勘探开发研究院 无锡石油地质研究所, 江苏 无锡 214126

Wuxi Research Institute of Petroleum Geology, SINOPEC, Wuxi, Jiangsu 214126, China

中国中西部地区大型盆地都经历了多期构造运动，这些大大小小的构造事件对盆地的形成演化起到了不同的控制作用。晚古生代以来，中西部地区大型盆地的发展可分为晚古生代-早中生代的"北聚南离"过渡构造体制和中生代以来的陆内变格体制，盆地关键变革期总体受控于这2种构造体制，随所处构造位置不同，在变革期次以及变形特征上存在一定差异。总体存在2个关键期：一是海西晚期-印支早期，主要导致盆地完成海陆转变；二是燕山期-喜马拉雅期，这是中西部地区构造活动最为强烈的时期，也是主要构造主形成期，同时也大多对应着碎屑岩层系的主要成藏期和改造期，其变形特征主要表现为断裂-褶皱改造和差异抬升掀斜作用。

Large basins in central and western China have undergone multiple stages of tectonic movement, which played different roles in controlling the formation and evolution of the basins. Since the Late Paleozoic, the development of these basins can be divided into the ‘north convergence and south separation’ transitional tectonic system from the Late Paleozoic to the Early Mesozoic and the intracontinental alteration system since the Mesozoic era. The change period of the basins is controlled by these two structural systems, while there are some differences in the transformation times and deformation characteristics in different structural locations. In general, there are two key periods. The first is from the Late Hercynian to the Early Indosinian period. The movement led to the completion of sea land transformation. The second is from the Yanshan period to the Himalayan period. This is the most intense period of tectonic activity in the central and western regions, and also the main formation period. At the same time, this period also corresponds to the main accumulation stage and transformation stage of clastic strata. The main deformation characteristics are fracturing, folding and differential uplifting.

国家科技重大专项"中西部重点碎屑岩层系油气富集规律与勘探方向"（2016ZX05002-006）资助。

https://doi.org/10.11781/sysydz201904475