关键词: 柴达木盆地, 构造单元, 基底岩性, 构造变形, 重磁特征

Abstract: Studies on fectonic units are of It is great significance in clearing the character of tectonic，deepening of the geological
understanding，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 the
character of the abnormality in gravitation and magnetic field，We find out that the results show that the Qaidam Basin had
obvious geographical characteristics with the east and west units along the Gansen-Xiaochaidan which are distinctly different
in sedimentation and fectonic deformation. The tectonic deformation is more intense in the west unit than in the east. And the
Qaidam Basin can be divided into six units：the obduction zone in south of Qiliang mountains，the obduction zone in north of
Kunlun mountains，Oulongbuluke uplift zone，the Yiliping，Sanhu and Delingha Depression.

Key words: Qaidam Basin, tectonic units, lithology of the bedrock, tectonic deformation, the character of gravitation andmagnetic field