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本文在大面积野外地质检查的基础上,较系统地对滇西澜沧群、崇山群中变质火山岩系的分布、旋回、岩类组合及岩石化学特征进行了综合研究。确认火山岩系属玄武岩加安山岩(加流纹岩)组合,TH+(CA)系列,岛弧喷溢喷发环境。后期经区域变质成绿片岩。惠民式铁矿床受火山活动及沉积岩相的双重控制;海相火山沉积层可能为云龙锡矿床的矿源层。
Based on the large-scale field geological examination, the paper comprehensively studied the distribution, gyration, assemblage and petrochemistry of metamorphic volcanic rocks in Lancang Group and Chongsheng Group in western Yunnan. It is confirmed that the volcanic rocks belong to the combination of basalt and andesite (plus rhyolite), TH + (CA) series and island arc spurt eruption environment. The late metamorphic green schist. The Huimin-type iron deposit is controlled by volcanic activity and sedimentary facies. The marine volcanic sedimentary layer may be the source layer of the Yunlong-tin deposit.