摘要
以浊积岩为容矿围岩的金矿床是世界上一种重要类型的金矿床。本文较系统地阐述了我国浊积岩金矿床的分布、地质地球化学特征及成矿作用。作者认为,浊积岩金矿床在我国分布广泛,其成矿时期横跨晚太古代至中、新生代,并具有一些独特的成矿特点,因此,有很大的找矿潜力。
Gold deposits hosted by turbidites and associated sedimentary rocks have a very wide distribution in China, ranging in age from late Archean to Tertiary.Most deposits occur in quartz veins, stockworks, stringers, and disseminated zones in fractures, faults, shears, drag folds, and openings on anticlines or along bedding planes, some deposits are replacement bodies developed in chemically favourable sedimentary rocks.There are many elements such as W, Sb, Ag, Pb, Zn, Cu, As, Hg that frequently associated with gold in these deposits.The mineralogy of most deposits is simple.Wall rock alteration effects are commonly mineral.The characteristics of geology and geochemistry,the distribution of gold contents in strata, the stable isotopic compositions of minerals a'nd the component of fluid inclusions in vein quartz indicate that the turbidite sedimentary sequences probably are the sources of the gold in these deposits.
关键词
浊积岩系
金矿
地球化学
成矿
Turbidite-sequence
Gold deposit
Geochemical feature
Minerogenesis
