辽宁省金矿成矿规律及成矿系列

Metallogenic regularity and series of gold deposits in Liaoning Province

辽宁省大地构造位置处于华北陆块北缘东段,省内金矿资源较为丰富。在研究典型金矿的基础上,总结了辽宁省金矿的成因类型、矿产预测类型以及金矿的时空分布规律。基于对辽宁省大地构造演化与金矿成矿关系的新认识,结合重大构造事件与金矿成矿效应的耦合关系,运用成矿系列理论揭示了省内金矿的成矿动力学演化机制,将全省金矿划分为3个成矿系列组合与6个成矿系列。研究表明,前寒武纪辽东地区在碰撞拼合及伸展构造背景下形成了沉积变质-热液改造成矿系列与变质热液成矿系列;中生代辽宁地区在构造体制转换过程中形成了陆相火山-次火山热液成矿系列、岩浆热液成矿系列、变质热液成矿系列以及沉积-变质热液成矿系列;新生代辽宁地区进入喜马拉雅造山运动,形成了沉积砂岩成矿系列。研究成果可为辽宁省金矿成矿作用的研究提供借鉴。

The tectonic position of Liaoning Province is located in the eastern segment of the northern margin of North China Block,and gold resources are rich in this province.By studying the typical gold deposits,the authors in this paper summarized the types of gold deposits,mineral prediction types and timeporal-spatial distribution of gold deposits in Liaoning Province.On the basis of new knowledge of relationship between tectonic evolution and gold mineralization in Liaoning Province,coupling relationship between major tectonic events and gold mineralization effect,this paper illustrated the dynamic evolution mechanism through metallogenic series theory,and the gold deposits in Liaoning Province was divided into three metallogenic series associations and six metallogenic series.The results show that the sedimentary metamorphic hydrothermal transformation metallogenic series and metamorphic hydrothermal metallogenic series were formed in the eastern Liaoning during Precambrian period under the background of collision amalgamation and extension structure.Continental volcanic subvolcanic hydrothermal metallogenic series,magmatic hydrothermal metallogenic series,metamorphic hydrothermal metallogenic series and sedimentary metamorphic hydrothermal metallogenic series were formed in Liaoning during the transformation of tectonic system in eastern China in Mesozoic,Liaoning Province was involved in Himalayan orogeny in Cenozoic,forming a sedimentary metallogenic series.The results can provide references for researches of Metallogenesis of gold deposits in Liaoning Province.