青海五龙沟矿集区典型金矿床深部盲矿预测构造叠加晕模型

五龙沟地区是青海省昆中构造成矿带的重要组成部分,该区金矿床严格受构造带控制,为典型蚀变岩型金矿床。区内典型金矿床地球化学和构造叠加晕特征研究表明:矿床具有Au、Ag、Cu、Pb、Zn、As、Sb、Bi、Hg、W、Mo、B、Co、Ni、V等多元素组合特点,主要金矿体赋矿构造带原生晕轴向分带规律表现为金矿体前缘指示元素为As、Sb、Hg、B,近矿指示元素为Au、Ag、Cu、Pb、Zn,尾晕指示元素为Bi、Mo、Mn、Co。在总结构造叠加晕预测标志基础上,建立了盲矿预测的构造叠加晕模型,通过赋矿构造带构造叠加晕特征研究,进一步圈定了深部找矿靶位。

Structural superimposed halo model for prediction of deep blind orebodyin Wulonggou gold concentration area, Qinghai

The Wulonggou region is an important part of the tectonic metallogenic belt in Qinghai Province, the gold deposit in the area is strictly controlled by tectonic belt, is a typical altered rock type gold deposit. The study results of geochemical characteristics and structural superimposed halo feature for typical gold deposits in the area indicate that the ore deposit is characterized with geochemical combination of Au, Ag, Cu, Pb, Zn, As, Sb, Bi, Hg, W, Mo, B, Co, Ni and V elements. By systematical analysis of axial zoning regularity of gold deposit, it shows that indicator elements for forward primary halo are As, Sb, Hg and B elements, indicator elements for gold orebody for Au, Ag, Cu, Pb and Zn elements, and tail halo indicator elements are Bi, Mo, Mn and Co. On the basis of summarizing predication criteria of structural superimposed halo, structural superimposed halo model for prediction of blind orebody in the depth was established, which will help to delineate the deep prospecting targets.