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钠长石广泛分布于湘西柳林汊金矿带的含金脉体中,利用显微镜下鉴定、X荧光光谱(XRF)、X射线衍射(XRD)、电感耦合等离子体质谱(ICP-MS)等分析手段对该区金矿床的钠长石进行了系统的研究。结果表明:该区粉红色、肉红色钠长石镜下呈板条状、粒状,解理不发育,双晶以聚片双晶为主,负低突起,干涉色一级灰白到一级淡黄;钠长石的Ab、An、Or的变化范围分别为97.32%～99.74%、0.12%～2.5%、0.13%～0.47%;该区钠长石的平均有序度都大于0.905,形成温度均在226～395℃之间;钠长石稀土含量普遍较低,在不同程度上都有LREE的富集,无明显的Eu、Ce异常。钠长石矿物学、地球化学特征均反映了该含金钠长石-石英脉是由热液作用形成。
The albite is widely distributed in the gold-bearing veins of the Liulinghu gold belt in western Hunan Province. It has been identified by means of microscopy, X-ray fluorescence (XRF), X-ray diffraction (XRD), inductively coupled plasma mass spectrometry (ICP-MS) Analytical methods have systematically studied albite in the gold deposits in this area. The results showed that the pink and flesh red albite showed lath, granular and cleavage under pink and red flesh. The double crystal was dominated by polycrystalline twin, Yellow and albite range from 97.32% to 99.74%, 0.12% to 2.5% and 0.13% to 0.47%, respectively. The average degree of order of albite in this area is greater than 0.905, and the formation temperature All of them are between 226 and 395 ℃. The content of rare earths in albite is generally low, and is enriched in LREE to varying degrees, with no obvious Eu and Ce anomalies. The albite mineralogy and geochemical characteristics all reflect that the gold-bearing albite-quartz vein is formed by hydrothermal interaction.