小佟家堡子金矿床微量稀土元素特征

为进一步探讨小佟家堡子金矿床成矿物质来源及印支-燕山期岩浆活动对其成矿作用的影响，对该矿床岩矿石进行微量稀土元素的测试和特征分析.微量稀土元素特征显示，与矿体相比，盖县组片岩、大石桥组大理岩显示出相似的微量元素变化趋势以及稀土配分模式，印支期花岗岩仅在P，Zr，Hf等微量元素上出现较大反差，吕梁期-燕山期岩浆岩体在稀土配分模式上只有Er明显亏损，反映金成矿与地层和岩浆岩关系密切;稀土元素特征显示成矿热液为富Cl^-的还原性流体，成矿物质来源和成矿流体来源具有复杂性，吕梁期和燕山期花岗岩与盖县组片岩和大石桥组大理岩均为该矿体的形成提供了成矿物质，且深部成矿物质也参与成矿，矿床类型为岩浆热液叠加型金矿床.

Characteristics of Trace Rare Earth Elements of Xiaotongjiapuzi Gold Deposit

The trace rare earth elements of rocks and ores in Xiaotongjiapuzi gold deposit was analyzed to discuss the mineral sources and the effect of Indosinian-Yanshan magmatic activities on mineralization.Gaixian Formation schists and Dashiqiao Formation marbles exhibit similar variation trends of trace elements and rare earth distribution patterns， and Indosinian granite showed little difference in trace elements such as P， Zr and Hf， et al.Lyuliang-Yanshan period magmatic rock mass lacked Er， reflecting that gold mineralization was closely related to the strata and magmatic rocks. Characteristics of rare earth elements suggested that the ore-forming hydrothermal was a reductive fluid rich in Cl^-， and metallogenic material source and ore-forming fluid source was complex.Lyuliang period granite， Yanshan period granite， Gaixian Formation schists and Dashiqiao Formation marbles all provided ore-forming material for the formation of ore bodies， and deep metallogenic material participated in the mineralization.Xiaotongjiapuzi gold deposit is a magmatic hydrothermal superimposition type gold deposit.