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应用常量元素、微量元素对岩浆岩进行构造环境、成因及岩源示踪时 ,首先必须在宏观区域地质、地球化学调查基础上 ,结合当时所形成的各类地质体岩石类型组合来恢复 ,它是宏观构造环境判别的基础 .其次 ,由于构造环境时空复杂性 ,需采用“两结合”的研究方法 ,一是多元地球化学信息示踪 ;二是不同岩类的时空配套 .第三 ,在选择判别图解时 ,需弄清前人图解的应用前提、适用范围和条件 ,以正确投点 .在此思想指导下 ,侧重对滇西北金沙江结合带各磨茸中酸性岩体进行了常量、微量元素的多元地球化学示踪 ,获得了较好的效果
When applying constants and trace elements to the tectonic setting, genesis and source tracing of magmatic rocks, we must first recover from the combination of the types of geologic rocks formed at that time on the basis of macroscopic geological and geochemical investigations Is the basis of the discrimination of macroscopic tectonic environment.Secondly, due to the space-time complexity of tectonic environment, we need to adopt the “two combined” research methods, one is multi-element geochemical information tracing, the other is the time and space supporting of different rock types.Thirdly, Judgment graphic, need to find out the predecessor graphic application of the premise, the scope and conditions of application, to the right investment point.Under the guidance of this idea, focusing on the Jinsha River in northwestern Yunnan Province with the grinding of the acidic rock in the constant, Element of multiple geochemical tracing, get better results