远喷口型SEDEX铅锌矿床最新研究进展及发展趋势

孙华山, 杨辉

Advance and Trend of the Vent-Distal SEDEX Lead-Zinc Deposits

Huashan SUN, Hui YANG

图4 交代作用对溶液pH值改变及其对硫化物沉淀顺序影响的热动力学模拟图解［14］ （a）黄铁矿稳定域pH值变化范围3~9；（b）闪锌矿稳定域pH值变化范围5~11； SEDEX型Pb-Zn矿床一般黄铁矿形成早于闪锌矿，闪锌矿形成与交代作用导致的溶液pH值升高有关

Fig. 4 Thermodynamic modeling diagrams illustrate how the pH value change， which is caused by the alteration between hydrothermal fluids and rocks， to effect on the precipitation sequence of sulfides from the hydrothermal fluids［14］ （a）Stable area of pyrite ranges from 3 to 9 in pH； （b）Higher pH value of 5~11 for sphalerite. Which gives a reasonable explanation for the formation of pyrite before sphalerite， and the latter is the result of alteration triggering pH value increasing