柴达木盆地构造样式的类型和展布

The type and distribution of structural style in Qaidam basin

盆地构造样式及展布规律研究是盆地构造研究的基础 ,对确定构造圈闭类型 ,指导油气勘探有重要意义。笔者通过各种资料综合分析 ,将柴达木盆地构造样式归为 14种基本类型 ,即生长逆断层、单冲构造、对冲构造、冲起构造、反冲构造、生长背斜、断展背斜、纵弯背斜、滑脱褶皱、断鼻构造、裂陷伸展构造、局部伸展构造、斜坡带和横向构造变换带。从动力学背景、基底卷入性、级别划分等方面讨论了构造样式的基本特征。对控制柴达木盆地构造样式类型和展布的区域构造环境、盆地基底性质、应力作用方式、岩石物理性质和构造演化阶段等因素进行了分析。

The study on structural style and its distribution pattern is a foundation for studying basin and important for recognizing the type of structural strap and guiding the oil and gas exploration On the basis of the synthetic analysis data, fourteen kinds of basic structural styles are recognized in Qaidam basin in this paper They are growth reverse fault, unilateral thrust structure, opposite thrust structure, lift off structure , back thrust, growth anticline, fault propagation anticline, longitudinal bend anticline, detachment fold, fault nose, extensional rift, part extensional structure, slope and transverse tectonic transfer zone The basic characteristics of structural style is discussed on the dynamic background, basement involved, grade, etc The control action of geotectonic environment, basement nature of the basin, stress state, rock physics nature and tectonic evolution stage on the type and distribution of structural style is analysed