四川马尔山铜矿成矿特征及找矿标志

Metallogenic characteristics and prospecting criteria of Mashan copper deposit,Sichuan Province

针对四川马尔山铜矿的开发发展,进而展开对四川马尔山铜矿成矿特征以及找矿标志的分析。通过分析四川马尔山铜矿成矿特征,明确成矿化学特征为:早阶段初始含矿流体具有高温(>360℃)岩浆热液的特点,溶解有大量SiO2,溶液可能呈弱碱性,其中铜和其它成矿元素主要呈稳定的络合物形式被搬运,成矿地质特征为:铜矿矿床布拉瓦约系与塞巴奎系呈不整合接触,其间有罗德斯德尔花岗岩岩基侵位,并伴有围岩强烈的褶皱变形、同化作用、花岗岩化作用和铜矿与白钨矿成矿作用;通过分析四川马尔山铜矿找矿标志,明确该地区地层找矿标志、构造找矿标志、岩浆岩找矿标志、地球化学找矿标志、蚀变找矿标志、古采遗迹找矿标志以及地表找矿标志。

In view of the development of the Mashan copper mine in Sichuan Province,the metallogenic characteristics and prospecting criteria of the Mashan copper mine in Sichuan Province are analyzed.Based on the analysis of the metallogenic characteristics of the malshan copper deposit in Sichuan Province,it is clear that the metallogenic chemical characteristics are as follows:the initial ore-bearing fluid in the early stage has the characteristics of high temperature(>360℃)magmatic hydrothermal solution,dissolving a large amount of SiO2,and the solution may be weakly alkaline,in which copper and other ore-forming elements are mainly transported in the form of stable complexes,and the metallogenic geological characteristics are as follows:the bravayo system and the sabaqui system of copper deposits are not During the integration contact,there is the intrusion of rodesdale granite batholith,accompanied by strong folding deformation,assimilation,granitization of the surrounding rock,and mineralization of copper and scheelite;through the analysis of the ore prospecting indicators of the malshan copper mine in Sichuan Province,the ore prospecting indicators of the strata,structures,magmatic rocks,geochemistry,alteration,etc.are determined Ancient mining relic and surface prospecting marks.