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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） |
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| 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 |
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| 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 |
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