A intracontinental soft collision foldbelt elongated to NNE orienation is recognized by the aid of genetic stratigraphic comparison, structural form and basin evolution analysis in Middle and South Guizhou and East Yunnan provinces. This soft collision foldbelt was formed by a coarse that the active continetal margin was overthrusting upon passive continental margin during convergent stage of the rifted oceanic basin due to lithospheric stretching. There are some synchronous sedimentary basins formed during Late Triassic, including West Guizhou and East Yunnan foreland basin, Pingle relict back-arc basin, one hundred thousands mountains backland basin and Longyan backland basin. Not only the soft collision foldbelt had covered the deep marine deposits and the oceanic crust of the intercontinental ocean developed in Late Permian to Medium Triassic, but also resulted in disconnection of the stratigraphic units, structural feature and paleogeographic environments between both sides of the soft collision foldbelt. Moreover, development of the soft collision foldbelt had a great influence upon the distribution and concentration of the basin ore deposits.
Xia Wenchen,Zhou Jie,Lei Jianxi et al. RECOGNITION OF THE INTRACONTINENTAL SOFT COLLISION FOLDBELT AND CONVERGENT COARSE OF THE RIFTED OCEANIC BASIN DUE TOLITHOSPHERIC STRETCHING[J]. Chinese Journal of Geology, 1995, (1): 29-39.