摘要
位于南阿尔泰-阿舍勒裂陷盆地铜金多金属成矿带上的沃多克金矿床,是继多拉纳萨依金矿后近几年发现的一个小型金矿床。矿床沿萨热乌增英云闪长岩体周围分布,金矿脉主要赋存于糜棱岩化石英闪长岩中,为查明矿化与石英闪长岩关系,通过研究矿体地质特征、矿区石英闪长岩岩石地球化学特征,结果显示,与矿化关系密切的石英闪长岩具高SiO_2(64.62%～68.80%)、高Al_2O_3(15.50%～18.48%)、富Na_2O(3.10%～5.01%)、贫K_2O(1.09%～3.47%),铝饱和指数A/CNK=1.51～2.45,属过铝质系列。岩石富集Rb,Pb,Sr等大离子亲石元素,明显亏损Ta高场强元素,轻稀土强富集、重稀土相对亏损,表明石英闪长岩与弧火山作用有关,可能为弧岩浆岩混染了地壳成分导致具相对富铝特征。
Woduoke gold deposit is located in the copper gold metallogenic belt of the South Altai-avrer rift basin,which is a small gold deposit discovered in recent years following the Doranasai gold deposit.Distribution of ore deposits along the sariuzeng tonalite.Gold veins are mainly hosted in mylonite quartz diorite.In order to find out the relationship between the mineralization and the quartz diorite,Through the study of the geological characteristics of ore body and geochemical characteristics of quartz diorite in the ore deposits.The results show that the quartz diorite,which is closely related to the mineralization,High SiO2(64.62%~68.80%),high Al2O3(15.50%~18.48%),rich Na2O(3.10%~5.01%),poor K2O(1.09%~3.47%),aluminum saturation index A/CNK=1.51~2.45,belong to the Peraluminous series.The rocks are rich in Rb,Pb,Sr and other LILE,significant loss of Ta high field elements,strongly enriched in LREE and relatively depleted in HREE indicating that the quartz diorite is related to the arc volcanism,which may be that the arc magmatic rocks is contaminated by the composition of the earth's crust leads to the characteristics of relative rich aluminum.
作者
王世伟
刘少帅
李伟龙
Wang Shiwei;Liu Shaoshuai;Li Weilong(Xinjiang Institute of Geology and mineral resources,Urumqi,Xinjiang,830000,China;Hebei JINGMIAO environmental consulting Co.,LTD.,Shijiazhaung,Heibei,050000,China)
出处
《新疆地质》
CAS
CSCD
北大核心
2018年第4期476-483,共8页
Xinjiang Geology
基金
新疆那拉提金矿带成矿规律研究及找矿靶区优选(XGMB2014015)共同资助
