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台湾自古以产砂金闻名,成为列强争夺的目标,远在荷兰及西班牙占据时代即已开采.台湾的金矿有岩金与砂金两种,分布很广,而以金瓜石及九份一带的矿床规模最大.金瓜石矿床位于基隆以东15公里,是台湾最大的金属矿床,除盛产金矿外,还有银矿及铜矿.附近地质系由石英安山岩及第三纪沉积岩所构成.矿床产于石英安山岩及第三纪沉积岩的接触带上,是一种浅成热液交代及裂隙充填矿床.矿石是含金的硫砷铜矿、辉银矿、黄铁矿、重晶石及石英等,品位低而储量极大,矿脉各处含量均匀,但自然金块体罕见,自然金的产状常为细粒结晶,富金矿体中的结晶直径约1mm,或集结成树枝状产出.
Taiwan has long been known for its gold-producing sands and has become the target of the powers competing far from the times of occupation in the Netherlands and Spain .Taiwan’s gold deposits are widely distributed in both gold and sapphire, while the deposits in Jinguashi and Jiufen areas The largest. Jinguashi deposit is located 15 km east of Keelung, is the largest metal deposit in Taiwan, in addition to rich gold, there are silver and copper deposits in the vicinity of the Department of quartz Andean and Tertiary sedimentary rock composition. On the contact zone between quartz andesite and Tertiary sedimentary rock, it is a shallow hydrothermal metasomatism and fissure-filling mineral deposit, which is gold-bearing arsenic copper mine, galena, pyrite, barite and quartz , The grade is low but the reserves are very large. The contents of the veins are uniform, but rare natural gold lumps are often produced by natural gold. The crystal grains in the gold-rich ore bodies are about 1 mm in diameter, or gathered into dendritic Out