摘要
甘肃阳山金矿是迄今为止中国发现的最大金矿。已发现的6个矿段均赋存于泥盆系中,矿石中金属矿物主要为黄铁矿和毒砂。黄铁矿有3种类型:微细粒浸染状、半自形颗粒集合体、自形单晶大颗粒;主要分布在千枚岩、花岗闪长岩、石英脉里,具有多期次多类型的特点。根据黄铁矿的特征,金矿化与石英脉体中细粒浸染状的一期黄铁矿有关。黄铁矿为重要的载金矿物之一,自然金(Au)主要以微细粒的形式赋存于黄铁矿晶体的裂隙内以及晶体与晶体的空隙间。黄铁矿赋存状态和分布特征的研究,对矿区进一步找矿具有指导意义。
Yangshan gold deposit in Gansu Province is the largest one discovered in China so far. 6 ore blocks are located in Devonian System. Metal minerals are mainly pyrite and arsenopyrite. Pyrite is main- ly in three occurrences i.. e. disseminated micro-grained pyrite, sub euhedral pyrite assemblage and big euhedral single pyrite crystal. Such pyrites are mainly distributed in phyllite, granitic diorite and quartz veins occurring in multi-stages and types. Au mineralization is related to the first stage disseminated medium fine grained pyrite in quartz vein. Pyrite is one of the important gold carriers. Native gold occurs as micro-grain in cracks of pyrite and interstitial of pyrite crystals. Occurrence and distribution study of py- rite is of significance to further prospecting in the mining district.
出处
《地质找矿论丛》
CAS
CSCD
2013年第1期65-69,共5页
Contributions to Geology and Mineral Resources Research
关键词
阳山金矿区
黄铁矿
赋存状态
分布特征
甘肃省
Yangshan gold mining district
pyrite
occurrence
distribution pattern
Gansu province
