Their general characteristics are of obvious progressivemetamorphism, with the heat flow from mantle as the essential factor and a collision orogenic belt to be the tectonic setting.
其共同特征是：具明显的递增变质现象，以地幔热流上升为主要因素，构造背景为碰撞造山。
2
The middle Proterozoic crystalline schist series in the Panzhihua-Xichang region has undergone progressive regional metamorphism.