Its original rock is sedimented in the environment of active epicontinent-seaboard with basic volcanism, and become khondalite series through the Archean regional high-amphibolite facies metamorphism.
原岩形

有基性火山作用的活动大陆边缘滨海-浅海环境。经过太古宙的
域高角闪岩相变质作用,形
孔兹岩系。


变质的富铝质沉积岩组合,在晋宁期造山运动期间该


