安徽省池州市东风岭一带物化探异常特征及找矿方向  

Geochemical Anomaly Characteristics and Prospecting Direction in Dongfengling Area,Chizhou City,Anhui Province

作　　者：陈涛 CHEN Tao(Geological Team,Bureau of Geology and Mineral Exploration of Anhui Province,Anqing 246000,China)

机构地区：[1]安徽省地质矿产勘查局311地质队,安徽安庆246000

出　　处：《四川有色金属》2024年第1期31-33,49,共4页Sichuan Nonferrous Metals

摘　　要：研究区大地构造位于扬子地块北缘,属江南隆起带之陈塘-灌口向斜南翼中段。区内岩体、构造发育,在岩体接触带和构造破碎带内蚀变发育强烈,以硅化、黄(褐)铁矿化、绢云母化、碳酸盐化等为主,区域地球化学显示,区内热液型金、银多金属矿成矿条件较好。以区域地球化学异常为基础,通过土壤化学、物探测量,圈定以近东西-北东向逆掩断层和近东西向石炭系与泥盆系接触断层破碎带为主要找矿靶区。以物化探圈定的异常为依据,通过钻孔验证,在石炭系黄龙组灰岩与石英闪长玢岩逆(掩)断层破碎接触带上盘,发现并圈定含矿地质体。因此,物化探测量的工作手段在该地区可作为有效的找矿手段加以推广。The geostructure of the research area is located in the northern margin of the Yangtze block,which belongs to the middle part of the southern wing of the Chentang-Guankou syncline of the Jiangnan uplift belt.In this area,the rock mass and structure are developed,and the alteration development is strong in the rock mass contact zone and the structural fracture zone,mainly in silicification,yellow(brown)iron mineralization,sericite mineralization,carbonation,etc.Regional geochemistry shows that the metallogenic conditions of hydrothermal gold and silver polymetallic deposits in this area are good.Based on the regional geochemical anomaly and soil chemistry and geophysical survey,the main prospecting target areas are identified as the near east-northeast thrust fault and the near east-west contact fault fracture zone of Carboniferous and Devonian system.Based on the anomaly delineated by geophysical and chemical exploration,the ore-bearing geological body was found and delineated in the fracture contact zone of the reverse(overthrust)fault between Huanglong Formation limestone and quartz diorite porphyrite by borehole verification.Therefore,the physical and chemical exploration method can be used as an effective prospecting method in this area.

关 键 词：扬子地块 东风岭 物化探测量 找矿靶区 

分 类 号：P618[天文地球—矿床学]