摘要
滇中楚雄盆地是在扬子板块西南被动大陆边缘发育起来的一个中新生代含油气盆地．盆地形成于晚三叠世（印支晚期），经历了自印支期以来的多期次构造运动，具有复杂的构造形态．通过地质与地球物理资料的综合解析表明，哀牢山碰撞造山带形成后，盆地继续向造山带下发生陆内“Ａ”型俯冲，在盆地内形成了大规模的推覆滑脱构造，将古生界及部分中生界地层深埋其下；燕山期，盆地东部的隆升，形成向盆地内部的挤压推覆；喜山期印度板块与欧亚板块的碰撞，盆地基底断裂产生走滑活动，形成盖层内的花状构造．楚雄盆地内发育有古生界至中新生界海相到陆相多套生油层系，经过推覆后深埋于盆地内，得到了较好保存．据盆地埋藏与热演化史研究表明，古生界及三叠系主要生油层系已进入高热演化的干气阶段，揭示了楚雄盆地今后的勘探方向应以寻找天然气为主．
Chuxiong Basin, located in the middle of Yunnan Province, is a MesoCenozoic hydrocarbonbearing basin which was formed in late Triassic on the passive continent of Yangtze Plate. It has complicated structures for undergoing multiplecycle tectonic movements. The synthetic geologial and geophysical study shows the Chuxiong Basin continued to subduct under the Ailaoshan orogeny after its occurrence and Paleozoic and part of Mesozoic sediments were buried under the large scale thrustdetachment structures formed along the west of the basin. In Yanshan period, nappe structures occurred for the uplift in the east basin In Himalaya period, with the strike slip of the basement faults the flower structures formed in the cover after the collision between the Indian plate and the Eurasian Plate. There are several source beds including Paleozoic and MesoCenozoic marine and continental deposits which are well preserved under the nappe structures. The study of burial and thermal history indicates that the main source rocks are at the dry gas stage. It implies that Chuxiong Basin is a prospective gasbearing basin.
出处
《南京大学学报（自然科学版）》
CAS
CSCD
1998年第3期322-329,共8页
Journal of Nanjing University（Natural Science）
关键词
盆地
陆内俯冲
推覆滑脱
走滑构造
油气关系
Chuxiong Basin, intraplate subduction, nappe and detachment, strikeslip structure, hydrocarbon relationship
