山东国土资源2018，Vol.34Issue(6)：8-16,9.
沂沭断裂带中段牛家小河金矿主微量元素特征与地质意义
Characteristics of Main and Trace Elements and Geological Significance of Niujiaxiaohe Gold Deposit in Middle of Yishu Fault Belt
摘要
Abstract
Niujiaxiaohe gold deposit is a typical representative of the fractured altered rock type gold deposit in Yishu fault belt.Through study on petrological characteristics of ores and country rocks,and geochemical characteristics of main and trace elements,it is found that metallogenic elements with high metallogenic temperature,such as Fe,Co and Ni enriched in NJXH-1 sample;while metallogenic elements with low temperature enriched in NJXH-2 sample.The variable coefficient of Yishui group is high,and ore-forming elements distribute unevenly.It indicates that it is the main source bed of Niujiaxiaohe gold deposit.The REE distribution curve is rare earth element enrichment type.The characteristics of REE distribution from the ore of NJXH-2 are similar to these from Yishui group.It indicates that they may be from the same source.The characteristics of Y/Ho in the ore shows that the ore-forming fluids may come from metamorphic hydrotherm.Through summary and analysis,Niujiaxiaohe gold deposit may experience two stages of mineralization,and there is a significant difference in mineralization temperature.The main source of metallogenic minerals may come from granites in Yishui group and Yanshan period.The ore-forming fluid is weak reduction and metamorphic hydrotherm may participate in mineralization.关键词
成矿物质/成矿流体/地球化学/矿床成因/沂沭断裂带/牛家小河Key words
Metallogenic materials/ore-forming fluid/geochemistry/ore origin/Yishu fault belt/Niujiaxiaohe area分类
天文与地球科学引用本文复制引用
刘晓通,王向军,安鹏瑞,孟令强,唐重阳,杨锋杰,陈雷,毛光周..沂沭断裂带中段牛家小河金矿主微量元素特征与地质意义[J].山东国土资源,2018,34(6):8-16,9.基金项目
国土资源部金矿成矿过程与资源利用重点实验室和山东省金属矿产成矿地质过程与资源利用重点实验室开发课题(2013003)、国家自然科学基金项目(41572063,41772125)、山东省沉积成矿作用与沉积矿产重点实验室开放课题(DMSM201403)联合资助 （2013003）
