黄金科学技术 ›› 2023, Vol. 31 ›› Issue (1): 64-77.doi: 10.11872/j.issn.1005-2518.2022.06.084
Xiaoni CUN(),Yushan XUE,Yuliang WANG,Xinwei LIU
摘要:
龙头沟金矿是南秦岭柞水—山阳矿集区内的一处中型金矿床,主要载金矿物为黄铁矿。通过对Ⅰ-1号和Ⅳ-1号主矿体的黄铁矿晶形及化学成分标型特征进行研究,结果表明:矿石矿物黄铁矿晶形较为简单,以五角十二面体占比最高,总体上晶形出现率由高到低依次为五角十二面体、聚形、立方体和八面体;1 160 m中段矿化最强,其次为1 080 m中段,五角十二面体黄铁矿载金性优于其他晶形;黄铁矿的S含量为52.71%~67.80%,平均值为55.79%,Fe含量为28.66%~45.33%,平均值为42.43%,总体为富硫亏铁型;Co/Ni比值介于1.38~13.33之间,平均值为2.88,Se含量约为4×10-4,S/Se比值介于0.76×103~5.39×103之间,表明龙头沟金矿为岩浆热液成因;晶形得分数X和D值分别为0~-13.33、0.652~1.089,基本位于矿体中下部位。结合地表矿体出露和剥蚀情况,认为深度仍具有一定找矿潜力,尤其是主矿区155线以东1 080 m中段下部和矿区以西香沟地区仍有找矿潜力。
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