甘肃玛曲大水金矿构造叠加晕特征研究

发布时间：2018-08-17 18:35

【摘要】：为探讨甘肃大水金矿深部成矿潜力,在分析矿区成矿地质条件及矿床地质特征的基础上,对大水金矿Au2主矿体开展了构造叠加晕研究。地球化学统计分析表明,大水金矿矿床元素组合为Au、Ag、Hg、As、Sb、W,矿区Au、Sb、Ag、As、Hg、U等元素背景含量较高。矿体轴向特征研究显示,大水金矿床Au2主矿体原生晕轴向分带具有"前、尾晕共存"或"反分带"特征,表明大水金矿具有多期多阶段叠加成矿-成晕的特征。在矿体上部(标高3800m),前、尾晕形成叠加或共存,指示上部矿体已剥蚀;而在矿体尾部(标高3500m),Hg、Te、As、Sb等前缘晕元素又发育内、中带强异常,形成了前、尾晕叠加或共存,指示深部找矿前景较好。
[Abstract]:In order to discuss the deep ore-forming potential of Dashui gold deposit in Gansu province, based on the analysis of the ore-forming geological conditions and the geological characteristics of the deposit, the structural superposition halo of the Au2 main orebody of Dashui Gold Mine was studied. The geochemical statistical analysis shows that the element assemblage of the Dashui gold deposit is Au-Ag-Ag-Ag-Ag-As-Sb-W, and the background content of the elements such as Au-SbAg-Ag-Ag-As-HgNU is relatively high in the ore area. The study on the axial characteristics of the ore body shows that the primary halo axial zonation of the Au2 main orebody of the Dashui gold deposit has the characteristics of "coexistence of forebody and tail halo" or "reverse zoning", which indicates that the Dashui gold deposit has the characteristics of multi-stage superimposition of ore-forming halo. In the upper part of the orebody (3800m elevation), the caudal halo forms superposition or coexists in front, indicating that the upper orebody has been denudated, while in the front halo elements such as HgnteTeAsAsSb, there is a strong anomaly in the middle zone, which results in the superposition or coexistence of the former and the caudal halos. The prospect of indicating deep prospecting is better.
【作者单位】：中国地质大学(北京)地球科学与资源学院;河北省区域地质矿产调查研究所;甘肃地矿局第三地质矿产勘查院;
【基金】：国土资源部公益性行业科研专项基金项目(201411024) 中国地质调查局项目(2015020902029) 中央高校基本科研业务费专项
【分类号】：P618.51

【参考文献】