构造地球化学测量方法在老挝 Phabon金矿床的应用及深部预测

Application and deep prediction of structural geochemical measurement methods in the Phabon gold deposit of Laos

中文关键词: Phabon金矿床  轴向分带序列  构造地球化学  原生晕特征  隐伏矿预测中图分类号:P618.51文献标志码:A文章编号:1674-7801(2025)02-0294-15

英文关键词: Phabon gold deposit  axial zonation sequence  structural geochemistry  primary halo characteris-tics  concealed ore prediction

中文摘要:

      Phabon金矿是老挝境内首个发现的方解石型金矿，矿体赋存于下二叠统的厚层灰岩中，主要受构造控制。为了寻找矿区深边部隐伏矿体，缓解矿山对后备资源的需求，本文以Ⅴ号矿体为研究主体，采用构造地球化学测量方法对其中 19种元素数据进行统计分析，通过对比已知区未知区地球化学特征，认为 Au的成矿过程与 Hg、Ni、As的富集有密切关系，其元素组合有一定的找矿指示意义，矿体首尾部出现前缘晕和尾晕叠加现象，分带序列排列复杂且出现“反分带”现象，预测矿区深部存在隐伏矿体。该方法补充和完善了已有成矿模型，可为深边部隐伏矿的预测提供数据支撑，指导矿山开发。

英文摘要:

      Phabon gold mine is the first discovered calcite-type gold deposit in Laos. The ore body is hosted inthick layers of Lower Permian limestone and is mainly controlled by tectonics. To search for concealed ore bodies inthe deep and peripheral parts of the mining area and alleviate the demand for reserve resources, this study takes theNo. 5 ore body as the research subject and uses the tectonic geochemical survey method to statistically analyze thedata of 19 elements. By comparing the geochemical characteristics of the known and unknown areas, it is believed that the mineralization process of Au is closely related to the enrichment of Hg, Ni, and As, and the combination ofthese elements has certain exploration significance. The leading and trailing halos overlap at the head and tail of theore body, and the zonation sequence is complex with "reverse zonation" phenomena. It is predicted that there areconcealed ore bodies in the deep part of the mining area. This method supplements and improves the existing miner-alization model and can provide data support for the prediction of concealed ore bodies in the deep and peripheralparts, guiding the development of the mine.