云南南华纪——新近纪沉积盆地类型及其特征

The types and characteristics of the southern Neogene Neogene sedimentary basins in Yunnan

云南地壳结构复杂,其发展存在基底形成、洋陆转换与陆内发展三个阶段。其中早元古代-中元古代为基底形成阶段。从晚元古代南华纪至第四纪的漫长地质历史中,云南地壳经历了洋陆转换与陆内发展两个阶段,发育了多种沉积盆地类型。不同沉降机制的沉积盆地其沉积特征也不同。不同类型沉积盆地发育的时限,也清晰地反映了云南地壳发展的不同阶段。

The crustal structure of Yunnan is complex,and its development has three stages：basement formation,oceanic land conversion and intracontinental development.The early Proterozoic-Mesoproterozoic is the basement formation stage.From the late Proterozoic Nanhua period to the Quaternary long geological history,the Yunnan crust underwent two stages of ocean land transformation and continental development,and many types of sedimentary basins were developed.Sedimentary basins with different sedimentation mechanisms are also different in sedimentary characteristics.The time limit for the development of different types of sedimentary basins also clearly reflects the different stages of the development of the earth＇s crust in Yunnan.