河北井陉—内丘一带铜矿稳定同位素组成及地质意义  

Stable isotopic compositions and their geological significance in the Jingxing-Neiqiu copper deposit area,Hebei Province

作　　者：李辉[1] 胡建勇[1] 张道忠[1] 

机构地区：[1]天津华北地质勘查总院,天津300170

出　　处：《矿产勘查》2014年第1期21-25,共5页Mineral Exploration

摘　　要：河北井陉—内丘一带铜矿处在兴安—太行南段成矿带上,区域矿产远景评价认为该区资源前景较大。根据矿点赋矿特征和空间分布规律,该带铜矿分为桃园式、鸡冠山式和上寨式3种类型。文章通过对铜矿硫、碳、氢和氧同位素组成特征研究,认为成矿物质来源于围岩,即甘陶河群南寺掌组变质火山—沉积岩建造中的基性火山岩;成矿流体源自古大气降水与基底岩石发生水—岩反应而形成的建造水。区域构造演化为成矿提供动力和储矿空间。The Jingxing Neiqiu copper deposits are located in the southern part of the Xingan Taihang metallogenic belt, there is a great prospecting potential based on the regional resources potential evaluation results. According to the occurrence character istics and spatial distribution of copper deposits, they are divided into three types, i.e. Taoyuan type, Jiguanshan type and Shangzhai type copper deposit. In this paper, the characteristics of S, C, H and O isotopic compositions of copper deposits in the Jingxing Neiqiu area has been studied. The results show that the metallogenic materials are derived from the surrounding country rocks, i.e. metamorphic basic volcanic sedimentary rocks of the Nanzhangsi formation of Gantaohe Group. Ore forming fluids are derived from the water rock reaction water between the paleo meteoric and base rocks. The regional tectonic evolution offered the metallogenic dynam ics and mineralization deposition space.

关 键 词：同位素组成 成矿流体 铜矿床 井陉—内丘 

分 类 号：P618.41[天文地球—矿床学]