THE DISCOVERY AND GEOLOGICAL FEATURE OF KYANITE-TOPAZITE IN HIGH-PRESSURE BELT FROM CENTRAL CHINA

For the first time, we find kyanite-topazite which is similar to the w hite schist from abroad, in Jiangsu, Anhui, Henan of China. Because of intercontinental obduction and collision. the kyanite-topazite is for med from the superhigh-pressure metamorphism of sedimentary rock in co ntinental crust, at the depth of mantle. Kyanite-topazite runs paralle l to blue schist, eclogite and constitutes the high-pressure metamorph ic belt in Central China. Its original rocks are a set of sedimentary rock series which is mainly composed of marginal shallow marine facies to continental facies pelitic to magnesium carbonatite. both rocks ex ist in Precambrian Middle-Upper Proterozoic metamorphic strata.