柴达木盆地构造单元划分

盆地构造单元的划分对明确盆地内部基本构造特征，深化对盆地的地质认识、指导油气勘探具有重要意义。通过对盆地沉积中心的迁移规律、油气分布特点、基底岩性、起伏特征、重磁电资料以及构造变形特征等构造单元划分依据的分析，表明柴达木盆地具有明显的分区特征，甘森—小柴旦一线在沉积构造特征方面表现出明显的东西分区性。西区构造变形强烈，可划分为祁南逆冲带、一里坪拗陷和昆北逆冲带3 个构造单元；东区构造变形相对较弱，可划分为德令哈拗陷、欧龙布鲁克隆起和三湖拗陷3 个构造单元。

Tectonic Units of the Qaidam Basin

Studies on fectonic units are of It is great significance in clearing the character of tectonic，deepening of the geologicalunderstanding，and guiding oil and gas exploration. Based on the study on the principle of division about tectonic features，transportation of the depocenter，distribution of the oil and gas，lithology character and fluctuation of the bedrock and thecharacter of the abnormality in gravitation and magnetic field，We find out that the results show that the Qaidam Basin hadobvious geographical characteristics with the east and west units along the Gansen-Xiaochaidan which are distinctly differentin sedimentation and fectonic deformation. The tectonic deformation is more intense in the west unit than in the east. And theQaidam Basin can be divided into six units：the obduction zone in south of Qiliang mountains，the obduction zone in north ofKunlun mountains，Oulongbuluke uplift zone，the Yiliping，Sanhu and Delingha Depression.