胶东金矿床Au迁移富集的地球化学探讨

本文编制了系统 Fe²⁺—Fe³⁺—∑S—∑CO₂—SO₁^2-]和 Fe²⁺—FeS—FeCO—Fe(OH)₂的相图,以及溶液中络合物 Au—s 和 Au—Cl 在不同温度下的 C_Au—PH 图。有证据表明,金可能是以 Au—S 络合物形式迁移的,控制金沉淀的主要因素是溶液的 Eh 和∑S 的活度。

GEOCHEMICAL RESEACH ON MIGRATION AND CONCENTRATION OF AU IN JIAODONG GOLD DEPOSITS

In this paper the phase diagrams of two systems,Fe²⁺—Fe³⁺—∑S—∑CO₂— SO₄^2-] and Fe²⁺—FeS—FeCO₃—Fe(OH)₂,and the C_Au—PH diagrams of two complexes,Au—S and Au—Cl,under different temperatures are compiled.There are evidences that gold could be transported as Au—S complex,and Eh and ∑S activity of solution are main factors for gold precipitation.