老挝帕奔金矿床地质特征及成矿过程分析

Analysis to the Geological Characters and Metallogenic Process of Phapon Gold Mine in Laos

老挝位于冈瓦纳大陆与劳亚大陆的交接部位,北西部分与我国云南"三江"造山带相连,帕奔金矿位于丰沙里-帕府中生代拗陷带与琅勃拉邦-梨府华力西褶皱带的交接部位,在琅勃拉邦断裂带附近,成矿条件极为有利。帕奔金矿矿床类型确定为中低温热液交代-充填矿床。本文通过对金的来源、热液来源、构造条件、围岩条件等几方面研究了矿床成因,并结合成矿期次的划分及稳定同位素研究,探讨了该矿床的成矿过程。

Laos is located in the cross of the two ancient lands Gondwana and Laurasia.The northern Laos joins theThree-Rivers＂orogenic belt.Phapon gold mine is located in the cross of a hollow zone and a fold zone,which is near Luang Prabang,with favorable metallogenic settings.Phapon gold deposit is mesothermal-epithermal replacing-infilling deposit.Through the study to such factors as gold source,fluid source,structures and host rocks,this article analyzes the deposit genesis,and combining the division of metallogenic phases and study of stable isotope,the article investigates the metallogenic process of the deposit.