安徽庐江黄屯铜金矿床原生晕特征及矿床成因  

Primary halo characteristics and genesis of Huangtun copper-gold deposit in Lujiang,Anhui Province

作　　者：侯照方 王安迪 王昭 许强平 HOU Zhaofang;WANG Andi;WANG Zhao;XU Qiangping(No.327 Geological Team,Bureau of Geology and Mineral Exploration of Anhui Province,Hefei 230011,Anhui,China)

机构地区：[1]安徽省地质矿产勘查局327地质队,安徽合肥230011

出　　处：《华东地质》2021年第3期339-349,共11页East China Geology

基　　金：中国地质调查局“安徽黄屯地区深部矿产调查与找矿预测(编号:121201004000160901-10)”项目资助。

摘　　要：通过对安徽庐江黄屯铜金矿床18号勘探线上的4个钻孔岩心进行系统取样和分析,研究了18号勘探线剖面地质特征及原生晕分带特征,探讨了该矿床的地球化学异常模式及矿床成因。黄屯铜金矿床的特征元素组合为Au、Ag、Cu、As、Sb、Bi、W,原生晕垂向分带序列为(Sb、As)-(Ag、Au、Cu)-(Bi、W)。18号勘探线剖面地质特征和原生晕形态特征显示,在ZK18-1钻孔和ZK18-2钻孔之间可能存在隐伏断层,造成铜金矿体和地层错动。在TK02钻孔底部发育热液矿床前缘晕元素组合异常,指示深部可能存在隐伏矿体。综合研究认为,黄屯铜金矿床的成矿物质可能主要来源于火山热液和闪长玢岩,该矿床为火山次火山热液型矿床。Based on the systematic sampling and analysis of the four drill cores in the exploration line 18 of Huangtun copper-gold deposit in Lujiang,Anhui Province,this paper studies the geological characteristics and primary halo zoning characteristics of the exploration line18,preliminary summarizes the geochemical anomaly pattern of the deposit,and explores the possible genesis of Huangtun copper-gold deposit.Au,Ag,Cu,As,Sb,Bi and W are the characteristic element assemblage of Huangtun copper-gold deposit,and the vertical zoning sequence of the primary halo of this deposit is(Sb,As)-(Ag,Au,Cu)-(Bi,W).The geological characteristics and primary halo morphology of the exploration line 18 show that there may be a hidden fault between the borehole ZK18-1 and ZK18-2,resulting in dislocation of copper-gold ore body and stratum.Element association anomaly of front halo in hydrothermal deposit is developed at the bottom of borehole TK02,indicating that there may be concealed ore bodies in the deep.The comprehensive study shows that the ore-forming materials of Huangtun copper-gold deposit may be mainly derived from volcanic hydrothermal and diorite porphyrite,and this deposit belongs to volcanic-subvolcanic hydrothermal type.

关 键 词：原生晕特征 分带序列 地球化学异常模式 黄屯铜金矿 

分 类 号：P632[天文地球—地质矿产勘探]