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新的同位素年代学、岩石学与地球化学研究表明云南前寒武纪各岩群普遍由跨越古、中和新元古代不同时代的构造片岩组成。哀牢山群和瑶山群是相连接的同一地层单元 ,主体岩石形成于 130 0～ 16 0 0Ma。昆阳群下亚群泥质碳酸盐沉积岩Pb Pb等时年龄在 170 0～ 16 0 0Ma之间 ,上亚群大营盘组为 12 6 0Ma。苍山群的变拉斑系列形成于岛弧环境 ,其钕模式年龄值在 15 0 0～ 2 0 0 0Ma ,Sm Nd等时年龄近于为 16 5 0Ma ,εNd(t) =+ 7.4。形成于板内环境的碱性系列玄武岩 ,钕模式年龄值在 10 0 0～ 110 0Ma。苴林群变拉斑玄武岩钕模式年龄为 16 0 0～ 170 0Ma ,εNd(t) =+ 6 .6 ;变碱性玄武岩样品为 80 0～ 10 0 0Ma ,可与苍山群相比较。钕模式年龄和Pb同位素填图表明昆阳群与大红山群 ,苴林群与苍山群分别归属于扬子和印支块体的准同时地层。成矿年龄测定表明前寒武纪地层中成矿作用表现为 70 0～ 90 0Ma的改造成矿 ,与大规模从基性到酸性的岩浆活动密切相联系。90 0～ 10 0 0Ma板内环境碱性玄武岩的广泛出现 ,标致着大陆裂解的开始。晋宁期花岗岩活动从早期 (80 0～ 830Ma)的偏中酸性到晚期 (6 80～ 780Ma)的酸性 ,表明构造环境从拉张向挤压环境发展 ,体现了Rodinia超大陆形成、裂解到冈瓦纳大陆形成的过程
New isotope geochronology, petrology and geochemistry studies show that the Precambrian geothermal rocks in Yunnan Province are generally composed of tectonic schist that spans the ages of the Paleozoic, Neoproterozoic and Neoproterozoic. The Ailao Mountain Group and the Yao Mountain Group are the same stratigraphic units that are connected, and the main rock is formed at 130 0 ~ 16 0 0 Ma. The Pb-Pb isochron age of the Kunyang Group sub-group of argillaceous carbonate sedimentary rocks is between 170 and 160 Ma, and the upper sub-group of Taiying Pan is 126 Ma. The variation series of the Cangshan Group formed in the island arc environment. The Neodymium model age value is between 15 000 and 200 Ma, and the Sm Nd isochron age is near 16 5 0 Ma and ε Nd (t) = + 7.4. Alkaline basalts formed in an intraplate environment have a neodymium age of 10 0 to 110 0 Ma. The nepheline model age of the 苴-Lin group stratiform basalt is 1600 ~ 17000Ma and εNd (t) = +6.6. The samples of alkaline basalts are 80-1000Ma, which can be compared with those of Cangshan group. Neodymium model age and Pb isotopic mapping indicate that Kunyang Group and Dahongshan Group, Zhelin Group and Cangshan Group belong to the quasi-simultaneous strata of the Yangtze and Indosinian, respectively. The determination of metallogenic age indicates that the mineralization in the Precambrian strata is characterized by remodeling and mineralization from 70 0 to 90 0Ma, closely related to the large-scale basic-to-acidic magmatism. 90 0 ~ 100 000 Ma plate alkaline alkaline basalt widespread, peugeot cracked the beginning of the mainland. The activity of the Jinning granites from the early (80 0 ~ 830 Ma) to the late (6 80 ~ 780 Ma) acid shows that the tectonic environment developed from extensional to compressive environment, which shows the formation of Rodinia supercontinent, cleavage to the Gang Wana formation process