三山岛金矿成矿物质来源及成矿作用探讨

Study on Metallogenic Material Sources and Mineralization of Sanshandao Gold Deposit

摘要:

三山岛金矿位于郭家岭幔枝构造北西缘的三山岛仓上成矿断裂带上。通过对三山岛金矿成矿作用的详细分析，认为金矿的控矿构造三山岛断裂是郭家岭幔枝构造外围拆离滑脱带上发育的反倾向铲状断裂。幔源成矿流体通过幔枝构造轴部韧性剪切带向上迁移，在有利的温度、压力控制下迁移至幔枝构造外围的三山岛断裂带中，当向上迁移还原环境的成矿流体与向下渗透氧化环境的大气降水相遇，便发生强烈的氧化还原反应并最终富集成矿。该文探讨了三山岛金矿床成矿规律，建立了成矿模式，并提出了今后的找矿方向。

Abstract:

Sanshandao gold deposit locates in the SanshandaoCangshang Mineralization fault zone in northwest of Guojialing mantle branch structures. Through detailed analysis on mineralization of Sanshandao gold deposit, it is regarded that gold orecontrolling structure is Sanshandao fault. It is a countertendency listric fautle developed in decoupling detachment belt of Guojialing peripheral mantle branch structure. Mantlederived oreforming fluid transferred through the ductile shear zone of mantle branch structure axis, and under favourable temperature and pressure, it will be transferred to Sanshaodao fault of peripheral mantle branch. When oreforming fluid under the migration and reduction environment met atmospheric precipitation under the downward penetrating oxidizing environment, strong oxidationreduction reaction can be happened and concentrated into deposit. In this paper, metallogenic regularity of Sanshandao gold deposit has been discussed, mineralization mode has been set up, and ore prospecting direction has been put forward as well.