摘要
通过对苇沙河金矿床地质特征、成矿条件研究,认为苇沙河金矿床产于早元古代集安群荒岔沟组变质火山岩及中元古代老岭群板房沟组浅变质碎屑岩中,区内发育石英闪长岩,矿化受NE向断裂带控制。矿体形态为脉状、似层状及透镜状,矿体厚度及品位变化较大。金矿围岩蚀变发育,包括硅化、黄铁矿化、褐铁矿化、绢云母化、绿泥石化。金矿(化)带的形成与闪长岩体有密切关系。中酸性岩浆活动与断裂构造是矿床形成的关键因素。地质特征表明,板房沟金矿为叠加改造型金矿床。
Study on geological features and ore-forming conditions of Weishahe gold deposit,it is considered that the gold deposit originates in metamorphic volcanic rocks of the of early Proterozoic Ji＇an Group Huangchagou Formation and shallow metamorphic clasolite of the Mesoproterozoic Era Laoling Group Banfanggou Formation.The quartz diorite develops in the area,the gold mineralization are controlled by the NE trend faults.The ore bodies are vein,stratoid and lenticular.Thickness and grade of the ore bodies change greatly.The alteration types include silicification,pyritization ferritization sericitization and chloritization.The formation of gold mineralization belt has close relation with diorite rock mass.Intermediate acidity magmatic activity and the fault structures are the key factors that controlled the deposit.The geological features show that Banfangou gold deposit is a superimposed remould type.
出处
《吉林地质》
2013年第4期37-42,共6页
Jilin Geology
关键词
苇沙河金矿床
地质特征
元古代
变质碎屑岩
矿床成因
Weishahe gold deposit
geological features
Proterozoic
metamorphic clasolite rock
genesis of deposit
