Abstract— A weathering profile of phyllite shales with an original Ag concentration of 10 –5 wt % (the average Ag concentration in the Earth’s crust is 7 × 10 –6 wt %) was numerically simulated with the SELECTOR program package. Under oxidizing conditions, Ag occurs in the solutions dominantly in the form of the $${\text{Ag}}_{{({\text{aq}}{\text{.}})}}^{ + }$$ cation and a few percent of the anion , at a total Ag concentration of ×10 –6.4 mol/L. Under reduced conditions, the dominant ion is $${\text{Ag}}_{{({\text{aq}}{\text{.}})}}^{0}$$ , whose concentration is 10 –8.19 mol/L. The mineral form of Ag throughout the whole vertical section is native silver.

中文翻译：

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老化剖面中银行为的物理化学模型

摘要— 使用SELECTOR 程序包对原始Ag 浓度为10 –5 wt %（地壳中的平均Ag 浓度为7 × 10 –6 wt %）的千枚岩页岩风化剖面进行数值模拟。在氧化条件下，Ag 主要以 $${\text{Ag}}_{{({\text{aq}}{\text{.}})}}^{ + }$ 的形式存在于溶液中$ 阳离子和百分之几的阴离子，总 Ag 浓度为 ×10 –6.4 mol/L。在还原条件下，优势离子为 $${\text{Ag}}_{{({\text{aq}}{\text{.}})}}^{0}$$ ，其浓度为 10 – 8.19 摩尔/升。贯穿整个垂直截面的 Ag 矿物形式是天然银。