界面矿床与峨眉山玄武岩

Interface ore deposits and Emeishan basalt

文章称发育在下二叠统茅口灰岩与覆盖其上的上二叠统峨眉山玄武岩之间界面上的众多矿床为界面矿床,并列出了各类代表性界面矿床的地质特征。从这些地质特征可以看出:界面是成矿的有利空间。富含成矿物质的峨眉山玄武岩的多期次喷发以及喷发-成岩-风化-喷发的多旋回机制使成矿物质得以逐渐富集而成矿,形成了一个以玄武岩为中心的Cu-Ag-Sb-S-Fe-Mo的成矿序列。

In this paper those ore deposits located at the interface between the Maokou Limestone in the Lower Permian and the Emeishan basalt in the Upper Permian are called as interface ore deposits.Their geological characteristics are also enumerated.It could be seen that interfaces are the favorable position for mineralization.Owing to polygenic effusive activity of the Emeishan basalt rich in ore materials and polycyclic mechanism of effusion-diagenesis-weatheringeffusion,the material ore-forming is concentrated gradually and then the various ore deposits are formed. So that a Cu-Au-Sb-S-Fe-Mo mineralized belt, with regard to basalt as the center, is formed.