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本文首次测定了呷村黑矿矿石中流体包裹体的REE组成 ,计算了与含矿流纹岩系熔体平衡的岩浆热液REE含量。主成矿期流体具有轻稀土富集、Eu明显正异常的特点 ,但岩浆热液却具有明显的Eu负异常特征 ,结合热液体系氧同位素及稀土元素交换反应模拟 ,表明岩浆热液不是直接的成矿热液。蚀变围岩具显著的Eu正异常 ,其它稀土元素出现亏损。蚀变反应水 /岩比值较大 ,蚀变岩中的REE组成反映了成矿热液REE的特点 ,且REE亏损程度与蚀变强度、流体 /岩石比值呈正相关。
This paper first measured the REE composition of fluid inclusions in the 呷cun black ore and calculated the REE content of the magma hydrothermal solution in equilibrium with the ore-bearing rhyolite. The main mineralization period has the characteristics of light rare earth enrichment and Eu positive anomaly. However, the magmatic hydrothermal fluid has obvious Eu anomaly characteristics. Combined with the hydrothermal oxygen isotope and REE exchange simulation, it is concluded that the magmatic hydrothermal fluid is not directly Mineralization hydrothermal solution. The alteration surrounding rocks have significant Eu anomaly and other rare earth elements appear loss. The water / rock ratio of the alteration reaction is relatively large. The REE composition of the altered rock reflects the characteristics of the REE of the ore-forming hydrothermal fluid, and the degree of REE depletion is positively correlated with the alteration strength and fluid / rock ratio.