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Ｋｏｒｙｕ 矿山位于北海道南西部， 为一浅成低温热液型Ａｕ－ Ａｇ 石英脉型矿床．矿床产于中新世黑色泥岩中的东西向剪切带内． 矿床含有８ 个主要脉体， 总体呈东西走向， 在水平、垂直方向上均发生结构、构造的变化． １ 号脉和３ 号脉中冰长石Ｋ－ Ａｒ年龄为０．８～１．２ Ｍａ， 表明矿化时代为更新世． 根据矿脉体的穿插关系和脉内矿物共生关系得出矿区有２ 期矿化， 早期矿化可分３ 个阶段（即Ｅ－ Ⅰ， Ｅ－ Ⅱ， Ｅ－ Ⅲ）， 晚期矿化可分成７ 个阶段（即Ｌ－ Ⅰ，Ｌ－ Ⅱ， Ｌ－ Ⅲ， Ｌ－ Ⅳ， Ｌ－ Ⅴ， Ｌ－ Ⅵ， Ｌ－ Ⅶ）． 宽矿脉体由多阶段矿化组成， Ａｕ－ Ａｇ 矿化主要与Ｌ－ Ⅲ阶段矿化密切相关． 早期矿化形成的特征矿物为钙菱镁矿、钙锰辉石及少量矿石矿物； 晚期矿化形成大量矿石矿物． 含Ａｕ－Ａｇ 的矿物主要为银金矿、螺状硫银矿－ 辉硒银矿、硫锑铜银矿－ 硫砷铜银矿、浓红银矿－ 淡红银矿、辉铜银矿、马硫铜银矿、碲银矿和黝铜矿． 而脉石矿物为绿泥石、蒙脱石、石英． 区内许多成矿阶段均含富气相流体包裹体， 这表明沸腾作用在整个过程中间歇发生． 早期矿化温度 （２６３～２８３℃） 稍高于晚期矿化温度 （２４６～２６０℃）． 成矿溶液盐度为０．５％ ～６．?
Koryu mine is located in the south western Hokkaido, a shallow epithermal Au-Ag quartz vein type deposit. The deposit is produced in the east-west shear zone in the Miocene black mudstone. The ore deposit contains 8 main veins, with an overall east-west trend, and structural and structural changes occur in horizontal and vertical directions. The K-Ar ages of ores from 1 to 3 are between 0.8 and 1.2 Ma, indicating that the mineralization age was Pleistocene. According to the relationship between mineralization and intergrowth of minerals in the vein, there are two stages of mineralization in the mining area. Early mineralization can be divided into three stages (ie, E- I, E- II and E-III), and late mineralization can be divided into 7 (Ie, L-, L-, L-, L-, L-, L-, L-). Wide ore veins are composed of multi-stage mineralization. Au-Ag mineralization is closely related to L-III stage mineralization. The characteristic minerals formed by early mineralization are calcium magnesite, calcium-pyroxene and a few ore minerals; late mineralization forms a large amount of ore minerals. The Au-Ag-bearing minerals are mainly silver and gold, spiro sulfur silver ore - Hui Se silver, sulfur antimony copper silver - sulfur arsenic copper silver, thick red silver ore - light red silver, Hui copper silver, Horse copper copper silver, tellurium silver and tetrahedrite. The gangue minerals chlorite, montmorillonite, quartz. Many metallogenic stages in the region contain gas-phase fluid inclusions, indicating that boiling occurs intermittently throughout the process. Early mineralization temperature (263 ~ 283 ℃) slightly higher than the late mineralization temperature (246 ~ 260 ℃). The salinity of ore-forming solution is 0.5% ~ 6. ?