gold minerals include native gold and silver gold. ore-forming period was later than that of the formation of igneous rocks and belongs to late mesozoic yanshan period.
金矿物有自然金、银金矿等。成矿时代稍晚于巖浆巖形成时代,属中生代燕山晚期;
native gold as fine grains and micro grains occurs in pyrite, arsenopyrite and limonite. gold ore is intensively oxidized and characterized by low impurity and easily sorting.
自然金呈微细粒和显微细粒赋存于黄铁矿、毒砂及褐铁矿之中。
the main metallic mineral is specularite containing native gold and electrum. surbordinate minerals are pyrite, chalcopyrite siderite and a very small amount of sulfosalt.
金属矿物较简单,主要为镜铁矿含自然金和银金矿,次为黄铁矿、黄铜矿、菱铁矿和微量硫盐。
such kind of super-pure native gold can not be found in nature.
理论分析表明 ,超纯自然金的形成与强氧化性的酸性成矿流体有关。
metallic mineral excepting this native gold and native silver, as well as pyrite, stibnite, cinnabar, scheelite, dalarnite, magnetic iron ore, limonite.
金属矿物除自然金、银外,还有黄铁矿、辉锑矿、辰砂、白钨矿、毒砂、磁铁矿、褐铁矿;
the authors adopt the combination of physical and chemical methods to separate native gold in 9 mining areas and good results are achieved. the gold purity is usually up to over 99%.
作者用物理方法和化学方法相结合分离了九个矿区的自然金,效果良好,其纯度一般达99%以上。
the gold behaves irregular granular native gold and electrum, mainly occurred in gold-carrying minerals(such as pyrite, quartz)in the from of fissure gold, intercrystalline gold or inclusion gold.
the native gold is main gangue minerals and it is fine particle and micro-fine particle.
金矿物以自然金为主,可回收元素金为细粒金和微细粒金。
native gold are mainly hosted in pyrite and quartz.
主要载金矿物为黄铁矿、石英。
all the gold particles are native gold mineral with very high fineness according to eds and epma analyses.
根据分析电镜能谱分析及电子探针分析,这些金均为独立的自然金矿物,具有极高的成色。
native gold has close relation with stibnite and quartz. gold inclusions accounted for 50% or more. intergranular gold and fissured gold have paragenetic relation with stibnite and quartz.