冀东下营坊金矿床黄铁矿原位微量元素地球化学特征及其指示意义

下营坊金矿床为冀东地区一个重要的金矿床，为进一步探讨金矿不同矿化类型之间的关系及其成因。本次在总结下营坊金矿床地质特征基础上，通过LA-ICP-MS微区原位分析，获得下营坊金矿床不同矿化类型矿石中黄铁矿的微量元素含量特征。对比分析发现，从热液型矿化到角砾岩矿化，再到矽卡岩型矿化，其微量元素含量呈连续的规律性变化，结合金矿化与大东山的时空关系，指示下营坊金矿床成因上与大东山杂岩体关系密切，表明它们可能属于同一个岩浆体系在不同物理化学条件下的演化产物。

Characteristics and indicative significance of in-situ trace elements of pyrite in the Xiayingfang gold deposit, Eastern Hebei Province

The Xiayingfang gold deposit is an important gold deposit in eastern Hebei region. In order to further explore the relationship between different types of mineralization of gold deposits and their genesis. On the basis of summarizing the geological characteristics of the Xiayingfang gold deposit, the micro-area in-situ analysis of LA-ICP-MS was used to obtain the trace element content characteristics of pyrite in different mineralization types of the Xiayingfang gold deposit, from hydrothermal-type mineralization to breccia-type mineralization, and then to skarn-type mineralization, the content of trace elements changes regularly, indicating that the genesis of the Xiayingfang gold deposit is closely related to the Dadongshan complex. They may belong to the evolution products of the same magmatic system under different physical and chemical conditions.