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首次报道云开隆起低压麻粒岩950Ma左右的变质作用年龄,结合麻粒岩的岩相学以及区域地质特征,指出晋宁期云开地区处于拉张的构造环境。
It is the first time to report the metamorphic ages of the low-pressure granulite about 950 Ma in the Yunkai uplift. Combined with the petrography and regional geological characteristics of granulite, it is pointed out that the Yun-Kai area in Jinning Period is in a tensioned tectonic setting.