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实验的初始物质是两个化学成分不同的天然流纹岩样品,介质是含铅和锌的NaCl或HCl溶液,压力为1—5kbar,温度为800℃,实验时间为3天。所有实验都是在内加热高压釜中完成的。K_(pb)~p及K_(Zn)~p的总误差小于±15％。实验结果显示,随着压力的增加,K_(pb)~p及K_(Zn)~p值明显减小。温度对K_(pb)~p和K_(Zn)~p的影响是可以忽略的。含HCl溶液的K_(Zn)~p比含同样重量摩尔浓度的NaCl溶液的K_(Zn)~p高几倍.本研究的结果显示,当岩浆流体从地壳浅处的水饱和岩浆中释放出来时,岩浆流体含有高浓度的贱金属。
The starting material for the experiment was two samples of natural rhyolite with different chemical compositions. The medium was a solution of NaCl or HCl containing lead and zinc. The pressure was 1-5 kbar, the temperature was 800 ° C and the experiment time was 3 days. All experiments were done in a heated autoclave. The total error of K_ (pb) ~ p and K_ (Zn) ~ p is less than ± 15%. The experimental results show that, with the increase of pressure, K_ (pb) ~ p and K_ (Zn) ~ p values decreased significantly. The effect of temperature on K_ (pb) ~ p and K_ (Zn) ~ p is negligible. K_ (Zn) ~ p in HCl-containing solution is several times higher than K_ (Zn) ~ p in NaCl solution containing the same molar concentration.The results of this study show that when magma fluid is released from water-saturated magma in shallow crust, Magma fluids contain high concentrations of base metals.