歧口凹陷中央隆起带构造样式及形成演化特征

重新划分了歧口凹陷二级构造单元，解析了盆地中央隆起带，并指出中央隆起带是一个复合的构造系统，阐明了其变形机制。在此基础上，运用沉降史分析方法确定了歧口凹陷中央隆起带新生代形成演化过程。指出歧口凹陷中央隆起带的发育经历了多期、多幕的演化过程，自渐新世开始，隆起带的演化自西向东迁移，各个时期也具有自西向东沉降速率加快的趋势。古近纪沙河街组三段至二段（沙三至沙二）沉积时期，盆地主要受伸展作用控制，中央隆起带西段形成翘倾旋转断块；古近系沙-沉积时期，受深断裂走滑作用影响，中段形成地层平坦的地垒构造；古近纪东营组沉积时期，东段白东区形成大型复合滚动背斜，叠加新近纪走滑作用产生的正型负花状褶皱构造。

Structural Style and Character of Evolution for Central Uplift Belt in Qikou Depression

This paper has reconsidered the secondary tectonic units of Qikou Depression and discussed its tectonic style for central uplift belt scientifically.It is pointed out that central uplift belt in this depression is a complex tectonic system and its mechanism of deformation is illuminated.On this basis,the process of information and evolution in Cenozoic is quantitatively studied with subsidence history analysis method.The conclusion is that the central uplift belt in Qikou depression developed through a mult...