The Significance And Characteristic Of Microtectonics Of The Defomation In Malipo,southeastern Yunnan Province

Malipo in the southeast part of Yunnan province,located in the north of the Song Chay dome and in the southwest of the Southern China plate,has undergone periods of intense tectonic activities like the joint of South China plate,caledonian fold uplift of South China,subduction of oceanic plate and plate escape.For the tectonic deformation stage,small scale structure,microstructure and deformation condition of the area,Previous studies have not been deeply studied.I have got some new recognition through the field geological survey,structural analysis and the analysis of the temperature and pressure conditions of deformation.The time of deformation can be divided into three phases.The first phase of deformation is from the South West to the Northeast thrust resulted in folds and mylonitize,and the microscopic characteristics mainly for dynamic of quartz and calcite crystal.The development of recrystallization quartz and mylonitic calcite EBSD experiment suggest that the temperature of this deformation is less than 400? and the depth is about 10 km.