安徽宁国荷花塘地区铜多金属矿地质地球化学特征及找矿潜力  

Geological and Geophysical Characteristics and Prospecting Potential of the Cu-polymetallic Deposit in Hehuatang Area in Ningguo County,Anhui Province

作　　者：张吉生[1] 

机构地区：[1]安徽省地质矿产勘查局322地质队

出　　处：《现代矿业》2017年第7期161-166,共6页Modern Mining

摘　　要：荷花塘地区处于扬子陆块南缘与北际山大岛弧的接合部位,钦杭成矿带南部边缘。结合该区地质工作成果,分析了区域成矿地质背景及矿区地质特征,并就区内1∶50 000土壤地球化学测量圈出的章坞—后山尖综合异常带特征进行了讨论,通过综合运用地质测量、槽探手段对该异常带进行了验证,发现了田村南一条铅锌银铜共生矿体以及后山尖3条以铅锌为主的多金属矿体(厚1.0~7.3 m)。研究表明:(1)区内矿体受控于南沱组地层、NE向和近EW向节理带、唐舍岩体,唐舍岩体南接触带具有寻找金银、锌、铅、钼等矿产的潜力;(2)章坞—后山尖综合异常带内产出的各矿体沿倾向、走向无钻探控制,储量规模较小,深部应有一定的找矿潜力;(3)建议对后山尖异常地表出露的矿化体进行深部追溯、控制,采用槽探揭示矿化体于地表的分布特征,并对深部矿体的变化情况进行钻探验证,此外,可对章坞—后山尖综合异常带内的近EW向构造矿化带进一步开展磁、电综合物探工作,有望取得找矿进展。Hehuatang area in Ningguo County is located at the contact area of the south margin of Yangtze continental block and Beijishan large island arc,and it is also located at the south of Qinghang metallogenic belt. Combing with the geological working results of the area,the regional metallogenic geological background,geological characteristics of the area are analyzed in detail,the Zhangwu-Houshanjian comprehensive anomaly belt is delineated based on 1∶ 50 000 soil geochemical measurement results,and its geochemical characteristics is discussed in depth. Besides that,the comprehensive anomaly belt is verified by adopting geological measurement and trenching method,a paragenetic ore-body of Pb,Zn,Ag and Cu found in Tiancunnan anomaly in the comprehensive anomaly belt,and three polymetallic orebodies mainly for Pb and Zn found in Houshanjian anomaly in the comprehensive anomaly belt（ the thickness of the three ore-body is 1. 0 ~ 7. 3 m）. The study results show that：（1）the ore-bodies found in Hehuatang area are controlled by the factors of Nantuo formation strata,NE-trending and near EW-trending joint belt,Tangshe rock mass,the prospecting potential of Ag,Zn,Pb and Mo of the south contact area of Tangshe rock mass is good;（2）the ore-bodies located at the Zhangwu-Houshanjian comprehensive anomaly belt are not controlled by drilling engineering along the tendency and direction of them,and the resources reserves scale of them are relative small,the depth of them may have some certain prospecting potential;（3） it is suggested that the deep traces and controlling works can be conducted of the mineralized bodies occurred in the surface of Houshanjian anomaly,that is to say,the surface distribution characteristics of the deep mineralized bodies can be revealed by trenching method,and the variation characteristics of the deep ore-bodies can be verified by conducting drilling engineering,besides that,the near EW-trending structural mineralized belt distributed in the Zhangwu-Houjianshan comprehensive anomaly

关 键 词：铜多金属矿 区域成矿地质背景 土壤地球化学测量 地质特征 异常查证 找矿潜力 

分 类 号：P618.2[天文地球—矿床学]