安徽西湾铅锌矿床地质特征与控矿因素  

Geological characteristics and ore-controlling factors of the Xiwan lead-zinc deposit in Anhui Province

作　　者：张建明 程培生[1,2] 李壮 杜东旭[1,2] 韩旭 顾大年[1,2] Zhang Jianming;Cheng Peisheng;Li Zhuang;Du Dongxu;Han Xu;Gu Danian(Geological Exploration Technology Institute of Anhui Province,Hefei 230031,Anhui,China;Energy Exploration Center,Bureau of Geology and Mineral Exploration of Anhui Province,Hefei 230031,Anhui,China)

机构地区：[1]安徽省勘查技术院,安徽合肥230031 [2]安徽省地矿局能源勘查中心,安徽合肥230031

出　　处：《地质学刊》2023年第3期249-258,共10页Journal of Geology

基　　金：安徽省地质勘查基金项目“无为县西湾铁多金属矿普查”(2012-1-4、2015-2-4、2018-1-Ⅰ、2021-1-续1)。

摘　　要：西湾铅锌矿床位于长江中下游成矿带中段庐枞矿集区北部、NE与近EW向基底断裂交会处,成矿条件优越。通过对矿区地质、矿化蚀变、矿体特征及矿石特征等进行分析,认为西湾铅锌矿的主要赋矿围岩为中三叠统周冲村组灰岩角砾岩,控矿构造为基底褶皱隆起带、基底断裂及其次级断裂,构造破碎带和“硅钙面”对铅锌矿体的控制明显。NE向断裂为导矿构造,其次级断裂及其形成的破碎带和“硅钙面”为容矿构造。根据赋矿围岩、控矿构造及铅锌矿赋存特征,认为西湾铅锌矿床的控矿因素为地层和构造,该矿床为受地层岩性和构造控制的热液充填型铅锌矿床。Xiwan lead-zinc deposit is located in the north of Luzong ore collection area in the middle part of the ore-forming belt of the middle and lower reaches of the Yangtze River,at the intersection of northeast and roughly east-west-trending basement fault,with superior ore-forming conditions.Based on the analysis of geology,mineralization alteration,orebody characteristics and ore characteristics,it is concluded that the main ore-bearing wall rock of the Xiwan lead-zinc deposit is the limestone breccia of the Middle Triassic Zhouchongcun Formation,the ore-controlling structure is basement fold uplift belt,basement fault and its secondary fault,and the structural fracture zone and″silica-calcium surface″have obvious control over the lead-zinc ore body.The northeast-trending fault is the ore-conducting structure,and its secondary fault and fracture zone and″silica-calcium plane″are ore-bearing structures.According to the ore-bearing wall rock,ore-controlling structure and occurrence characteristics of Pb-Zn deposit,it is considered that the ore-controlling factors of the Xiwan Pb-Zn deposit are strata and structure,and this Pb-Zn deposit is a hydrothermal filling one controlled by stratigraphic lithology and structure.

关 键 词：基底褶皱隆起带 破碎带 硅钙面 控矿因素 铅锌矿床 安徽西湾 

分 类 号：P618.4[天文地球—矿床学]