论文部分内容阅读
(一)问题的提出岩浆岩成矿专属性问题,尤其是成矿岩浆岩化学成分的研究,近年来取得不少成果。有人认为“岩浆的酸度控制了所含主要金属的种类”。但笔者认为,该论点没有解决母岩中SiO_2(所谓酸度)和成矿金属(Sn、W、Mo、Cu、Fe、Cr、V、Ti……)之间有什么内在地球化学联系;更没有说明在岩浆作用及内生成矿作用过程中,SiO_2是怎样控制着这些元素的运移与集散。事实上,SiO_2含量相近的不同岩浆岩(如闪长岩类与霞石正长
(A) the issue of the magmatic rock metallogenic specificity, especially the study of chemical composition of magmatic rocks, has achieved a lot in recent years. Some people think that “the acidity of magma controls the types of major metals it contains.” However, in my opinion, this argument does not solve any intrinsic geochemical linkages between SiO_2 (so-called acidity) and metallogenic metals (Sn, W, Mo, Cu, Fe, Cr, V, Ti ...) in parent rocks; Explain how SiO 2 controls the transport and distribution of these elements during the magmatic process and the process of endogenic mineralization. In fact, different magmatic rocks with similar SiO2 contents (such as diorite and nepheline)