引言火山岩的变质作用,在许多金矿床的形成中是经常发生的一种主要作用。但缺乏有关金从母岩中迁移的实际机理和火山岩中金背景含量方面的资料。本文的目的是要确定晚元古代霍加尔(非洲西北部)安山岩中金的背景值,估计低级变质作用时这些岩石中金分布的影响,以及这种作用在金矿床形成期间的可能影响。 Introduction The metamorphism of volcanic rocks is a frequently occurring major effect in the formation of many gold deposits. However, there is a lack of information on the actual mechanisms by which gold migrates from parent rocks and the gold background content of volcanic rocks. The purpose of this paper is to determine the background values ​​of gold in the Andean rocks of the Late Proterozoic Hoggar (northwestern African) and to estimate the effects of gold on these rocks during the low-grade metamorphism and the possible impact of this action during the gold deposit formation.