西准噶尔地区阿尔木强铜矿地质特征及成因分析

阿尔木强铜矿位于新疆西准噶尔盆地西北缘,中亚成矿域巴尔哈什—准噶尔成矿省塔尔巴哈台—谢米斯台成矿带的东端。文章以成矿地质条件、矿床地质特征为基础,通过岩石化学、微量元素及稀土元素的地球化学特征,探讨了矿床的地质特征与成因。研究表明,阿尔木强铜矿形成于中志留世火山岩强烈活动的后期,成矿环境为大洋岛弧构造环境,成矿温度属于中高温,成矿类型为火山岩容矿的构造热液改造型铜矿床。成矿阶段可划分为黄铁矿阶段、金属硫化物阶段、碳酸盐阶段、次生氧化阶段4个成矿阶段。

Geological characteristics and genesis of Almuang copper deposit in the western Junggar area

The Almuqiang copper deposit is located in the northwest margin of the western Junggar Basin in Xinjiang, the eastern part of the Central Asian metallogenic area, and the eastern end of the Taerbahatai-xiemisitai metallogenic belt in the Baerhashi-Junggar metallogenic province. Based on the geological conditions of mineralization and the geological characteristics of the deposit, the paper discussed the mineralization characteristics and genesis of the deposit through the geochemical characteristics of the rock chemistry, trace elements and rare earth elements. The results show that the Almuqiang copper deposit was formed in the later period of intense activity of the Middle Silurian volcanic rocks, the metallogenic environment was the oceanic arc tectonic environment, the metallogenetic temperature was high-medium, and the metallogenetic type was volcanic ore-bearing structural hydrothermal reformation Type copper deposit. The metallogenetic stages are divided into four:the pyrite stage, the metal sulfide stage, the carbonate stage and the secondary oxidation stage.