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蒙古国北肯特金成矿带毕利赫金矿床辉长岩 岩石地球化学特征及找矿意义
- 作者：
张帅|范羽|石传军|李江鹏|燕军利|韩世炯
- 作者单位：
- 蒙古正元有限责任公司|吉林大学地球科学学院
基金项目：
- 国家重点研发计划项目（2022YFE0119900）
详细信息：
- 作者简介：
- 张帅（1984—），男，高级工程师，从事地质矿产勘查和相关研究工作；E?mail：287725781@qq. com
- PDF下载
1
- English Author：
Zhang Shuai1, Fan Yu1, Shi Chuanjun1, Li Jiangpeng1, Yan Junli1, Han Shijiong2
- Unit：
- （1. Mongolia Zhengyuan Co., Ltd.; 2. College of Earth Sciences, Jilin University）
- 摘要
- 在线预览
- 参考文献
摘要:
毕利赫金矿床是北肯特金成矿带西南部新发现的浅成中低温热液型金矿床，矿体赋存于辉长岩中，受近南北向断裂控制，含金石英脉型和蚀变岩型矿体呈透镜状、脉状产出。通过系统分析毕利赫金矿床赋矿围岩辉长岩的岩石地球化学特征，并与北肯特金成矿带内典型金矿床（如博洛、那仁陶勒盖等金矿床）对比，探讨其成矿规律及找矿潜力。主量元素、稀土元素、微量元素分析结果显示，辉长岩富Mg、Fe、Ca，具有弱负Eu异常特征，与北肯特金成矿带内以中酸性岩体为赋矿围岩的金矿床差异显著。毕利赫金矿床成矿与晚三叠世岩浆热液活动相关，提出北肯特金成矿带西南部基性岩分布区及砂金矿集区附近是岩金矿勘查的潜在靶区，需重点关注基性岩体内部断裂及接触带。
关键词:
蒙古国；北肯特金成矿带；毕利赫金矿床；地质特征；辉长岩；岩石地球化学特征；找矿 意义
Abstract:
The Berx Uul Gold Deposit is a newly discovered epithermal gold deposit in the southwestern part of the North Khentei gold metallogenic belt. The orebodies are hosted in gabbro and controlled by nearly NS-trending faults, with lenticularor vein-shaped occurrences of gold-bearing quartz veins and altered rock-type orebodies. By systemati-cally analyzing the geochemical characteristies of the gabbro (host rock) in the Berx Uul Gold Deposit and comparing them with those of typical gold deposits in the North Khentei gold metallogenic belt (e.g., Boroo, Naren Tolgoi gold deposits),this study explores metallogenie patterns and prospecting potential. Results from major elements, rare earth elements, and trace elements indicate that the gabbro is enriched in Mg, Fe, and Ca, with a weak negative Eu anomaly, signifi-cantly differing from gold deposits hosted in intermediate-acid rocks within the North Khentei gold metallogenic belt. The mineralization of the Berx Uul Gold Deposit is associated with Late Triassic magmatic hydrothermal activity. This study proposes that mafic rock distribution areas and the vicinity of placer gold clusters in the southwestern part of the North Khentei gold metallogenic belt are potential target areas for rock gold exploration, with a focus on fractures within mafic rock masses and contact zones.
Keywords:
Mongolia; North Khentei gold metallogenic belt; Berx Uul Gold Deposit; geological characteristics; gabbro; petrogeochemical characteristics; prospecting significance
