Abstract:

Besides a few small to middle gold deposits, in the north margin of Tsaidam basin, the Yeluotuoquan cobalt mineralization was also discovered recently. Through the exploration, the cobalt mineralization is hosted in the fracture zone and altered diorite, but fracture zone is better than diorite, indicating a higher cobalt potential. The geochemical cross section displays an elemental zonation, downward, Cu-Zn-Pb-Mo-Ni-W-Co-Au. According to the drilling, the cobalt ascends to north and to the depth in the fracture zone. The north area has a bigger eroded depth than the south, belonging to a gasification to high temperature stage. This work provides a guidance for the next exploration.

Key words: Yeluotuoquan, fracture altered zone, Cobalt mineralization, ore-finding guidance

摘要：

野骆驼泉所在的柴达木盆地北缘除了有众多中小型金矿外，近年来，钴的找矿工作也有较大进展。在对该区钴矿的预查工作中发现，矿化体主要赋存于破碎带和蚀变的闪长岩中，破碎带的含矿性要好于闪长岩，成矿潜力也较大。破碎带的岩石地球化学剖面统计和分析显示，元素轴向分带序列为：Cu-Zn-Pb-Mo-Ni-W-Co-Au(由上到下)，地表和钻孔钴的化验结果表明，蚀变破碎带含钴具有由南向北逐渐升高、自地表向深部逐渐变富的趋势。因此，认为北部较南部剥蚀深度大，已经处于气化—高温阶段。本研究为下一部的找矿勘查提供了可供参考的依据。

关键词: 野骆驼泉, 破碎蚀变带, 钴矿化特征, 找矿方向