甘肃大口子北西金矿床地质特征及控矿因素研究  

The Geological Characteristics and Ore-controlling Factors of Northwest Dakouzi Gold Deposit, Gansu Province

作　　者：张海仁 ZHANG Hai-ren(Gansu nonferrous metals geological exploration bureau Zhangye mineral exploration institute,Zhangye 734000,China)

机构地区：[1]甘肃省有色金属地质勘查局张掖矿产勘查院,甘肃张掖734000

出　　处：《世界有色金属》2021年第6期95-96,共2页World Nonferrous Metals

摘　　要：甘肃大口子北西金矿床位于公婆泉铜铁金成矿带内,区域成矿地质条件良好,找矿潜力巨大。本文研究表明:矿区内金矿(化)体以透镜状产出,矿体走向与含金蚀变带展布方向一致,矿石平均品位变化较小,属于稳定型金矿床;矿体明显受控于构造和岩浆岩的双重作用控制,矿石类型包括石英脉型、破碎带型和闪长岩型金矿石;矿床的形成与华力西期二长花岗岩的侵入活动关系密切,为金矿化提供了丰富的热动力条件。The northwest gold deposit in Dakouzi,Gansu Province is located in the Gongpoquan Cu-Fe-Au metallogenic belt.The regional metallogenic geological conditions are good and the prospecting potential is huge.The results show that the gold(mineralization)body is produced in lenticular shape,the strike of the ore body is consistent with the distribution direction of the gold-bearing alteration zone,and the average grade change of the ore is small.It belongs to the stable gold deposit.The ore body is obviously controlled by the dual action of structure and magmatic rock.The ore types include quartz vein type,fractured zone type and diorite type gold ore.The formation of the deposit is closely related to the intrusion of the Valiscianmonzogranite,which provides abundant thermal and dynamic conditions for gold mineralization.

关 键 词：金矿床 地质特征 控矿因素 矿化蚀变带 载金矿物 

分 类 号：P618.51[天文地球—矿床学]