贵州安家沟铀矿床成因及找矿扩大方向

Genesis and the Next Exploration Orientation of Anjiagou Uranium Deposit in Guizhou Province

文章通过对安家沟铀矿床的矿石化学成分、微量和稀土元素分析,研究其成矿及地球化学特征,探讨矿床的成因。结果显示,该矿床具有明显的低温成矿元素组合,成因上与富含U、Sb、As、Pb、Zn等低温成矿元素的流体活动或热水作用有关;成矿物质来源具有多源性,有深部岩浆热液流体参与成矿。结合矿区地质构造和放射性物探资料分析,认为进一步找矿扩大方向应是水河坝-邪川、永新等推覆构造下盘的分支断层、层间破碎带发育地段,地表伽马异常密集区、低密度伽马异常区,以及息烽-湄潭-凤冈深断裂与南北向构造交汇部位。在这些部位有望找到深部隐伏盲矿体。

In this paper, the chemical composition of major elements, micro elements and REE of ores was used to study geochemical and metallogenic feature of Anjiagou uranium deposit and discuss the genesis of the deposit. The deposit was found with low temperature element combination and related to the activity of low temperature ore-forming fluid or hydrothermal liquid rich in U, Sb, As, Pb, Zn in genesis, the oreforming matter was of multi-source and participated by magma hydrothermal for the depth. With the analysis on regional structure and radioactive geophysical data, the next exploration orientation was believed along the interlayer fracture zone and the branches which were well developed in the footwall of Shuiheba-Xiechuan, Yunxin nappe structure concentration areas of surface γ anomaly, low density anomaly area and the joint area of NE striking Xifeng-Meitan-Fenggang deep fault and the SN striking faults, where deep blind ore bodies maybe existed.