Genesis of the Zhuanxinhu copper-silver polymetallic deposit in the Huanggangliang area
黄岗梁地区转心湖铜银多金属矿床成因研究

摘要

转心湖铜银多金属矿床是黄岗梁地区新近发现的矽卡岩型铜银矿床。矿区位于大兴安岭西南部苏尼特右旗晚华力西期内蒙地槽褶皱带内。本文在前期以及前人的工作基础上，通过详细的野外地质观察和系统的岩相学、矿相学以及探针测试分析工作，详细研究了转心湖铜银多金属矿床的蚀变与矿化特征。结果表明，该金属矿床的围岩蚀变类型主要有绿泥石化、硅化褐铁矿化、黄铁矿化，成矿过程可以划分为早期矽卡岩阶段、晚期矽卡岩阶段、铜-银氧化物阶段、石英-硫化物阶段和晚期碳酸盐-萤石阶段五个阶段。其中铜-银氧化物阶段含铜、银的金属矿物开始初步沉淀、富集。综合分析其矿床产出环境、成矿特征、控矿因素和围岩特点，认为该矿床应属中低温热液充填式铜锡多金属矿床。

Abstract

The Zhuanxinhu copper-silver polymetallic deposit is a recently discovered skarn-type copper-silver deposit in the Huanggangliang area. The mining area is located within the Late Variscan Inner Mongolian geosyncline fold belt in Sunite Right Banner, southwestern Greater Khingan Range. Building on previous work and previous studies, this paper investigates the alteration and mineralization characteristics of the Zhuanxinhu copper-silver polymetallic deposit through detailed field observations and systematic petrographic, mineralogy, and probe testing and analysis.
Results indicate that the main types of wall rock alteration in this metal deposit are chloritization, silicification, limonite, and pyritization. The mineralization process can be divided into five stages: early skarn stage, late skarn stage, copper-silver oxide stage, quartz-sulfide stage, and late carbonate-fluorite stage. During the copper-silver oxide stage, copper- and silver-bearing minerals began to precipitate and accumulate. A comprehensive analysis of the deposit's production environment, mineralization characteristics, ore-controlling factors, and surrounding rock features suggests that the deposit is a medium- and low-temperature hydrothermal-filled copper-tin polymetallic deposit.