黄金科学技术 ›› 2020, Vol. 28 ›› Issue (6): 812-824.doi: 10.11872/j.issn.1005-2518.2020.06.088
温佳伟1,2(),史鹏亮1,刘彦兵1,张静2(),屈海浪1,李元申1,胡博心1,缪广1
Jiawei WEN1,2(),Pengliang SHI1,Yanbing LIU1,Jing ZHANG2(),Hailang QU1,Yuanshen LI1,Boxin HU1,Guang MIAO1
摘要:
辽宁二道沟金矿为赋存在中生代陆相火山岩中的岩浆热液型矿床,矿脉严格受构造控制。为了预测1号和3号脉深部的延伸规模、成矿环境和矿化情况,通过系统采集分析450~-305 m大部分中段的黄铁矿样品,对成矿温度、剥蚀率、黄铁矿热电性、热电性参数(XNP)均值以及P型黄铁矿不同标高的出现率和离散度进行了研究。结果表明:1号和3号脉成矿温度集中在130~280 ℃之间,属于中低温热液矿床;1号和3号脉剥蚀率等值线向深部分别为低值区和高值区,且均未封闭,热电导型分别以P型、P-N型和P-N型、N-P型为主,在-305 m中段深部XNP均值分别为83.33(矿脉上部)和-8(矿脉中部),在-215 m中段深部P型黄铁矿出现率分别增加和减少,综合说明-305 m中段分别处于1号脉的中上部和3号脉的中部偏下位置,1号脉深部延伸较大,3号脉深部仍有部分延伸;在1号脉-215 m中段深部金的成矿环境逐渐稳定且矿化很好,在3号脉-260 m中段深部金的成矿环境由动荡转为稳定且矿化较好。
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