辽东早元古宙变质岩系中的一个推覆构造—青城子褶皱推覆构造

NAPPE TECTONICS IN THE PROTEROZOIC COMPLEXES IN LIAODONG PENINSULA, CHINA--AN EXAMPLE OF FOLD-NAPPE FROM QlNGCHENGZl

广泛发育的推覆构造是辽东早元古宙辽吉岩套的重要特征之一。青城子推覆构造就是一个实例。从构造样式与构造组合可以看出,青城子褶皱推覆构造的形成是早期褶皱构造的发展和继续。宏观和显微构造研究表明,推覆构造的发育包括了剪切作用、扩散蠕变、位错蠕变及压扁作用,同时伴有花岗岩的同构造底辟侵位过程。

One of the important features of the Early Proterozoic Liaojitite Suite in Liao-dong Peninsula is the widespread nappe tectonics, one of which is the Qingchengzi Nappe.It can be seen from the tectonic styles and structural associations that the fold-nappe in Qiagchengzi is the development of earlier fold structures.The formation and evolution, of the fold-nappeinvolve several mechanisms of deformation including shearing,diffusion and creep, flattening and diapiric intrusion of granite. It is these processes that make the fold-nappe to be matured.