陕西王家坪金矿床与国内外典型卡林型金矿床地质特征对比——兼论卡林型金矿床的判定原则

系统论述了王家坪金矿床的地质特征。在评述前人有关卡林型金矿床定义的基础上,提出了卡林型金矿床的6条判定原则:1赋矿围岩主要为细碎屑岩及碳酸盐岩;2金的粒度多为细粒—微粒—超显微金;3中低温的矿物共生组合和围岩蚀变;4具有Au、As、Sb、Hg基本共生元素组合;5成矿与构造关系密切;6富含碳质。将王家坪金矿床的地质特征与国内外典型卡林型金矿床进行对比,认为具有相似的成矿大地构造—岩浆活动背景、控矿容矿构造、赋矿地层岩性、元素共生组合及金赋存状态;但又具有以下突出特性:1雌黄化普遍发育,强于雄黄化,区别于国内外卡林型金矿床;2与美国卡林型金矿床相似,元素共生组合中具有W元素,区别于国内大部分卡林型金矿床。

Comparison of geological characteristics between Wangjiaping gold deposit in Shaanxi and the domestic and foreign Carlin-type gold deposits: discussion on judgment principles of Carlin-type gold deposit

The geological characteristics of Wangjiaping gold deposit is systematically described in this paper. On the basis of comment on the previous definitions of Carlin type gold deposit, the judgment principles of Carlin-type gold deposit was proposed as followings:ore-hosting rocks are mainly clastic rocks and carbonate rocks; granularity of gold is mainly the fine grained, particulate, and ultramicroscopic gold; low temperature mineral association and wall rock alteration; combination of paragenetic elements of Au-As-Sb-Hg;the mineralization is closely related to structures;rich in graphite and organic carbon. By the comparison of geological characteristics between Wangjiaping gold deposit and the domestic and foreign typical Carlin-type gold deposit, the paper puts forward the similarities and differences. These deposits have the similarities in aspects of tectonic- magmatic background, ore-controlling and ore-hosting structures, ore-hosting lithology,paragenetic element combination and gold occurrence. However there is its own characteristics for Wangjiaping gold deposit, the orpimentization is widely distributed than realgarization, and the element association contains tungsten element,which is similar to the Carlin-type gold deposits in United States and is different from the most of domestic Carlin type gold deposits.