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基金项目: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)
作者单位
张建明,程培生,李壮,等  
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。
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
Abstract:
      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.
Keywords:basement fold uplift zone  fracture zone  silica-calcium surface  ore-controlling factor  leadzinc-deposit  Xiwan, Anhui
张建明,程培生,李壮,等.安徽西湾铅锌矿床地质特征与控矿因素[J].地质学刊,2023,47(3):249-258