云南楚雄前陆盆地晚三叠世沉积建造及盆地演化

LATE TRIASSIC DEPOSITIONAL ASSOCIATIONS AND EVOLUTION OF CHUXIONG FORELAND BASIN IN YUNNAN

根据沉积建造的类型、系列和体态认为楚雄盆地在晚三叠世经历了３个明显的发育阶段：第一阶段为早期聚敛碰撞阶段，发育了黑色页岩建造和碳酸盐复理石建造；第二阶段为构造相对静止期，发育了火山复理石建造和陆源复理石建造；第三阶段为盆地充填阶段，发育了海相磨拉石建造和陆相磨拉石建造。３个阶段中的沉积建造属于次稳定型和非稳定型两大类。

Many kinds of deposuites(depositional associations)were developed in Chuxiong foreland basin in Late Triassic, including black shale deposuite, carbonate flysch deposuite, volcanic flysch deposuite, terrigenous flysch deposuite, marine molasse deposuite and terrigenous molasse deposuite. All these deposuites belong to two sorts of deposuite series with substable deposuite series and unstable deposuite series. Based on studying these kinds of deposuite, deposuite series and deposuite configuration in detail, the evolution history of Chuxiong foreland basin can be built and divided into three developing stages: The first stage can be considered the early convergent collision, developed the black shale deposuite and the carbonate flysch deposuite; the second stage is the tectonic relative stability, characterised by the volcanic flysch deposuite and the terrigenous flysch deposuite; and the infilling basin can be regarded as the last developing stage, formed marine molasse deposuite and terrigenous molasse deposuite as the remarks.