柴达木盆地构造单元划分  

Tectonic Units of the Qaidam Basin

作　　者：杨超 陈清华[2] 任来义[1] 张鸿超 史海军[4] 

机构地区：[1]陕西延长石油(集团)有限责任公司研究院,陕西西安710075 [2]中国石油大学(华东)地球科学与技术学院,山东青岛266555 [3]陕西延长石油(集团)有限责任公司天然气勘探部,陕西延安716000 [4]中国石油青海油田分公司采油一厂,甘肃敦煌816400

出　　处：《西南石油大学学报（自然科学版）》2012年第1期25-33,共9页Journal of Southwest Petroleum University(Science & Technology Edition)

基　　金：国家重大专项(2008ZX05005-004)

摘　　要：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。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 abnonuality 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.

关 键 词：柴达木盆地 构造单元 基底岩性 构造变形 重磁特征 

分 类 号：TE121[石油与天然气工程—油气勘探]