such progressive metamorphism 递增变质作用
zone of progressive metamorphism 十字石片岩
progressive retrograde metamorphism 逐渐退化变质作用
Their general characteristics are of obvious progressive metamorphism, 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。
The middle Proterozoic crystalline schist series in the Panzhihua-Xichang region has undergone progressive regional metamorphism.
攀西中元古结晶片岩系遭受了前进区域变质作用。
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