构造地球化学找矿方法在山东沂南金矿的应用及效果  

Application of Tectono-Geochemistry Prospecting in the Yinan Gold Mine,Shandong

作　　者：钱建平[1] 张海莹[1] 杜继旭[1] 覃顺桥[1] 徐磊[1] 常德才[1] 莫慧[1] 

机构地区：[1]桂林理工大学地球科学学院,广西桂林541004

出　　处：《矿物岩石地球化学通报》2017年第4期593-601,共9页Bulletin of Mineralogy, Petrology and Geochemistry

基　　金：国家自然科学基金项目(41263003);矿床地球化学国家重点实验室开放课题(201308);山东黄金地质矿产勘查公司项目(2012-2013)

摘　　要：为提高危机矿山找矿效果,运用构造地球化学测量,辅以坑道地质调查及编图、构造蚀变带填图和岩矿测试分析等手段在山东沂南金矿进行了找矿研究。结果表明,中性、酸性岩体接触带附近的寒武系和上元古界层间滑动带控制了矽卡岩型层状金铜矿体的产出,而在远离接触带的部位,高角度次级北北东、北西西-北西向断裂控制了构造蚀变岩型金铜矿体及异常的展布,其亦是矿区重要的控岩和控矿构造类型。Au、Ag、Cu、Mo、As、Sb、Hg是矿液带入的元素,Ti、Cr、V、Rb是围岩经蚀变带出的元素。Au、Cu具有共同迁移和沉淀的特征。构造地球化学找矿在堆金山片区和燕子湖片区取得了重要突破,下一步工作要重视沂沭断裂带附近第四纪覆盖区低缓构造地球化学异常之下隐伏的构造蚀变岩型金矿的找矿。Tectono-geochemical survey,combined with the underground geological investigation,tectonic alteration zone mapping,and rock and mineral analysis,is applied in exploration of the Yinan gold mine. The results show that the slip zones within the Cambrian and Permian Proterozoic strata the contact of intermediate and felsic rock have controlled the occurrence the skarn type gold-copper mineralization. Far from the contact,secondary NNE and NWW-NW trending faults control the distribution of Au-Cu ore bodies and related alteration. It is also an important rock and ore-controlling structure.Au,Cu,Mo,Ag,As,Sb,Hg are introduced by the ore-forming fluid,whereas Ti,Cr,V,Rb are released from altered wall rocks. Au and Cu show same behavior during transportation and precipitation during the evolution of hydrothermal fluids. Tectonic geochemical prospecting has been successfully applied in the Duijinshan and Yanzihu areas. The next prospecting target would be the structural-controlled altered rock that are covered with Quaternary sediments with low tectonic geochemical anomaly near the Yishu fault zone.

关 键 词：金矿 断裂 构造地球化学测量 沂南 山东 

分 类 号：P618.51[天文地球—矿床学] P632[天文地球—地质学]