西秦岭以地南金矿床地质特征及找矿方向  

Geological characteristics and prospecting direction of the Yidinan gold deposit in the west Qinling orogen

作　　者：朵得文 杨小英 黄小丰 王广有 王洁[3] 郭素雄 Duo Dewen;Yang Xiaoying;Huang Xiaofeng;Wang Guangyou;Wang Jie;Guo Suxiong(Gansu Jiaxin Mining Co.,Ltd.,Hezuo 747000,Gansu,China;Hunan Chenzhou Mining Co.,Ltd.,Guanzhuang 419605,Hunan,China;School of Earth Sciences and Resources,China University of Geosciences(Beijing),Beijing 100083,China;No.245 Geological Team,Hunan Nonferrous Geological Exploration Bureau,Jishou 416007,Hunan,China)

机构地区：[1]甘肃加鑫矿业有限公司,甘肃合作747000 [2]湖南辰州矿业有限责任公司,湖南官庄419605 [3]中国地质大学(北京)地球科学与资源学院,北京100083 [4]湖南省有色地质勘查局二四五队,湖南吉首416007

出　　处：《地质学刊》2024年第3期237-246,共10页Journal of Geology

基　　金：自然资源部成矿作用与资源评价重点实验室开放基金项目“西秦岭以地南金矿床成矿流体演化”(ZS2107)。

摘　　要：以地南金矿床位于西秦岭岗岔—阿什加金矿集区,系新探明的具有一定规模的金矿床。为进一步扩大矿床规模,基于已有地质成果资料,初步分析总结矿床的基本地质特征,指出进一步的找矿方向。结果表明:矿体赋存于德乌鲁石英闪长岩及其外围的近SN向断裂和岩体接触带内,主要受近SN向构造断裂破碎蚀变带控制;矿石类型以破碎蚀变岩型为主,金主要包裹于硫化物中,与金矿化有关的围岩蚀变为硅化、绢云母化、黄铁矿化、毒砂化等;金矿化的富集与蚀变强度及硫化物含量等直接相关,矿床地质特征与典型的造山型金矿床相似。根据现有资料,已知破碎蚀变带型矿体深边部金矿化尚未得到有效控制,仍具良好的找矿前景。The Yidinan gold deposit,located in the Gangcha-Ashijia gold ore-concentrated area in the west Qinling orogen,is a newly identified gold deposit of considerable scale.To further expand the deposit,this study preliminarily analyzes its basic geological characteristics and points out the prospecting directions based on previous geological achievements and data.The results indicate that the ore bodies are hosted within the Dewulu quartz diorite and its proximal SN-oriented fracture and contact zones.They are primarily controlled by fractured and altered zones along SN-oriented structural faults.The ore type is predominantly fractured and altered rock type,with gold mainly occurring within sulfides associated with alterations such as silicification,sericitization,pyritization,and arsenopyritization in the surrounding wall rocks.The enrichment of gold mineralization is directly correlated with alteration intensity and sulfide content,resembling typical orogenic gold deposits.Based on existing data,the deep marginal gold mineralization in fractured and altered zones remains inadequately controlled,indicating promising prospects for further exploration.

关 键 词：矿集区 地质特征 找矿方向 以地南金矿床 西秦岭 

分 类 号：P618.51[天文地球—矿床学]