流体—岩石相互作用—流体包裹体及蚀变岩某些成分变异的特征

以五龙金矿为例，在同一剖面上采集了不同成矿阶段的含金石英脉和近矿蚀变岩样品，．根据矿物流体包裹体和蚀变岩成分地的测定结果，系统地讨论了不同成矿阶段流体包裹体成（K^ 、Na^ 、Ca^＋、CO2等）和不同蚀变岩成分（K2O、Na2O、CaO1、MgO、CO2等）的变化规律，结果表明，从第二成矿阶段到第四成矿阶段，流体中的Na^ 、Ca^ 、Mg^ 含量有明显的升高的趋势，K^ 含量降低，蚀变岩中，K2O由远离矿体的原岩到靠近矿体的蚀变岩其含量增加，而Na2O、CaO、MgO逐渐降低，这种流体包裹体和蚀变岩中的某些相应成分的变化特征，应该是流体－岩石相互作用的结果。

EVIDENCE FROM CHARACTERISTIC COMPOSITIONS OF FLUID INCLUSIONS AND ALTERED ROCKS FOR FLUID/ROCK INTERACTION: AS EXEMPLIFIED BY THE WULONG GOLD DEPOSIT

On the basis of deposit geology, samples from Au bearing quartz veins of different metallogenic stages and altered rocks near the orebodies were collected systematically in the same section. In terms of the characteristic compositions of altered rocks and fluid inclusions, the variation trend of altered rock (K 2O, Na 2O, CaO, MgO, CO 2) and fluid inclusion compositions (K +, Na +, Ca 2+ , Mg 2+ , CO 2 ) heve been discussed. The results indicate that Na +, Ca 2+ and Mg 2+ show an obvious increasing tendency from the second to third ore forming stages, but K + shows a gradual decrease. Whereas in the altered rocks, K 2O and Na 2O, CaO and MgO from protolith to altered rocks near the orebody show an increasing and decreasing tendency, respectively. The mutual complementing of characteristic components is due to fluid/rock interaction in the metallogenic processes.