摘要
本文将柴达木盆地新生代构造样式的演化归纳为6种序列和两个主要阶段,即冲断构造→生长背斜→反冲断层+断展背斜序列、生长背斜→反冲断层+断展背斜序列、生长背斜→纵弯背斜序列、生长断层→纵弯背斜序列、生长断层→滑脱褶皱序列、水平岩层→纵弯背斜序列。构造样式的演化具有明显的地区性特点,盆地南北两侧具相似性,而盆地中央呈东西差异。两个阶段是喜马拉雅早中期的压缩构造样式发育阶段和晚期的强烈压缩构造样式发育阶段。控制柴达木盆地构造样式规律性的主要因素是区域构造环境、盆地基底性质、应力作用方式和岩石力学性质等。
Six growth sequences of Cenozoic structural styles are induced in the Qaidam basin in this paper. They are thrust structure→ growth anticline→back thrust + fault propagation anticline sequence, growth anticline→back thrust + fault propagation anticline sequence, growth anticline→ buckling anticline sequence, growth reverse fault→buckling anticline sequence, growth reverse fault→ detachment fold sequence, and horizontal stratum→ buckling anticline sequence. The evolution of structural style is similar in North and South parts of the basin and different in West and East parts of the central depression. The compression structural style was developed in the early and middle Himalayan stages and the strong compression structural style in the late Himalayan stage. The basic control factors to the regular evolution of the structural style are geo-tectonic environment, basement nature, stress state, physical nature of rocks and stage of tectonic evolution.
出处
《地质论评》
CAS
CSCD
北大核心
2000年第5期455-460,共6页
Geological Review
