摘要
中、晚石炭世和早二叠世，准噶尔盆地古陆块与其周缘的西伯利亚板块、哈萨克斯坦板块、塔里木板块碰撞，形成了盆地内西缘、南缘、东北缘三大前陆盆地系统。准噶尔盆地前陆盆地系统的演化发展经历了四个阶段，即盆前期的被动大陆边缘阶段，此期准噶尔盆地四周被海洋所围限，周边为被动型大陆边缘；周缘前陆盆地联合阶段，此时发育了西缘和东北缘两个前陆盆地；破裂前缘盆地阶段，此阶段南缘前陆盆地开始发育，由于基底卷入前陆盆地造成核部褶皱所分隔的孤立盆地；前陆盆地消亡阶段，此为前陆盆地大统一时期，发育阶段结束。经上述四个演化阶段形成了盆地二叠纪的构造格局，并形成了玛湖凹陷的西北斜坡区及其断阶带、中拐凸起、达巴松凸起、陆南凸起中西段和白家海凸起等有利油气聚集带。
Three large foreland basins formed in western margin, southern win and northeastern win ofJunggar basin as Junggar paleo-plate collided with Siberia plate, Kazakhstan plate and Tarim plate in Middle, Late Carboniferous and Early Permian. The foreland basin systems in Junggar basin have undergone four stages: ①passive continental margin period when Junggar basin was surrounded by ocean, with passive continental margin; ②foreland baSin combination period in which two foreland basins in western margin and northeastern margin formed; ③disrupture front basin period in which foreland basin in southern margin gradually developed, and the basement is involved in foreland basin and resulted in central fold isolated basin; ④foreland basin declining period in which foreland basins were integrated. The structural pattern of basin in Permian formed in these four stages, and the favourable oil/ gas accumulative belt such as northwestem slope area and faultstep belt, Zhongguai arch, Dabasong arch, Lunan arch and Baijiantan arch were formed.
出处
《新疆石油地质》
CAS
CSCD
1999年第4期293-297,共5页
Xinjiang Petroleum Geology
关键词
准噶尔盆地
晚石炭世
前陆盆地
油气聚集
油气藏
Junggar basin
Lower Carboniferous
Permian
Continental margin Foreland basin Evolution
Oil and gas accumulation
