山东大磨曲家金矿成矿动力学机制  

Geodynamics metallogenic mechanism in Damoqujia gold deposit of Shandong Province

作　　者：刘晓煌[1] 孙柏年[1] 吴靖宇[1] 康鸿杰[1] 倪克庆 朱多录[1] 李洪杰[3] 

机构地区：[1]兰州大学资源环境学院,甘肃兰州730000 [2]河北省区域地质调查研究所,河北廊坊065000 [3]武警黄金第七支队,山东烟台264004

出　　处：《兰州大学学报（自然科学版）》2007年第6期18-24,共7页Journal of Lanzhou University(Natural Sciences)

基　　金：国家自然科学基金资助项目(40372012).

摘　　要：通过对山东大磨曲家金矿蚀变带和主要围岩郭家岭花岗闪长岩的地球化学特征分析,得出了金矿蚀变带母岩与郭家岭花岗闪长岩属于同源,而郭家岭花岗闪长岩则是由于中生代地壳加厚,下地壳发生拆沉而形成的.阐述了由于郭家岭花岗闪长岩形成过程中,形成大量富含O_2的CO_2+H_2O的流体,使地幔金属化合物被氧化.当该流体沿着断裂带上升到一定位置,与围岩发生钾化、绿泥石化和绢英岩化后,使金发生沉淀,最后完成了金矿的地球动力学成矿过程.An integrated analysis of the alteration zones of the Damoqujia gold deposit and the geochemical characteristics of main surrounding rocks, namely the Guojialing grallodiorite, showed that the alteration zone＇s parent rocks of the gold deposit and the Guojialing granodiorite were from the same source, and indicated that the Guojialing granodiorite＇s dynamics mechanism was formed by the thickening of the mesozoic crust and the delamilnation of the lower crust. Meanwhile, the paper discussed that when the Guojialing granodiorite was made, plentiful CO2＋H2O fluid with rich O2 appeared, which produced metal compound in the mantle oxidize. When it rose to certain position, the fluid made the surrounding rocks to have Kfeldspar, chloritization and biotite and then gold deposited. Finally, metallogenic mechanism of the gold deposit＇s geodynamics was finished.

关 键 词：埃达克质岩 金成矿作用 郭家岭花岗闪长行岩 大磨曲家 

分 类 号：P618.51[天文地球—矿床学]