CAJ | 학술논문

硅孔雀石和透视石是在热液成矿作用下经过水-岩反应形成的产物，但这一认识缺少稀土地球化学研究成果的支持。本文通过电感耦合等离子体质谱分析获得两种矿物的稀土元素含量，其中硅孔雀石的稀土含量较低（∑REEs＝81.2 mg/kg），透视石的稀土含量极低（∑REEs＝0.65 mg/kg）；两者轻重稀土间分馏较为显著，LREEs/HREEs＝3.01和6.05，（ La/Yb ）H ＝3.08和7.91。球粒陨石标准化的稀土元素配分模式图均表现为轻微“负铕异常”（δEu＝0.565和0.702）、轻稀土富集、重稀土稳定的右倾特征，表明两者物质来源于同一物体。硅孔雀石显著“负铈异常”（δCe＝0.219），透视石无“负铈异常”（δCe＝0.949），应为两者晶体结构差异所致。研究认为，硅孔雀石和透视石中的稀土元素继承了成矿岩石的稀土特征，证实了两者是在同一氧化条件下通过水-岩反应形成的产物。
규공작석화투시석시재열액성광작용하경과수-암반응형성적산물，단저일인식결소희토지구화학연구성과적지지。본문통과전감우합등리자체질보분석획득량충광물적희토원소함량，기중규공작석적희토함량교저（∑REEs＝81.2 mg/kg），투시석적희토함량겁저（∑REEs＝0.65 mg/kg）；량자경중희토간분류교위현저，LREEs/HREEs＝3.01화6.05，（ La/Yb ）H ＝3.08화7.91。구립운석표준화적희토원소배분모식도균표현위경미“부유이상”（δEu＝0.565화0.702）、경희토부집、중희토은정적우경특정，표명량자물질래원우동일물체。규공작석현저“부시이상”（δCe＝0.219），투시석무“부시이상”（δCe＝0.949），응위량자정체결구차이소치。연구인위，규공작석화투시석중적희토원소계승료성광암석적희토특정，증실료량자시재동일양화조건하통과수-암반응형성적산물。
Chrysocolla and dioptase were considered to be formed from hydrothermal solutions by fluid-rock interaction,but this view was not verified by REE geochemistry. In this study,the REEs contents in these two minerals were determined by Inductively Coupled Plasma-Mass Spectrometry ( ICP-MS ). Results show that chrysocolla has total REEs of 81 mg/kg,whereas dioptase has total REEs of 0. 65 mg/kg. There is obvious fractionation of LREEs from HREEs for chrysocolla and dioptase with LREEs/HREEs ratios of 3 . 01 and 6 . 05 ,and (La/Yb)H ratios of 3. 08 and 7. 91,respectively. The chondrite-normalized REEs patterns of two minerals show weak Eu anomalies with δEu of 0. 565 and 0. 702,respectively,with LREEs enrichment and flat HREEs, indicating their similar source. Obvious Ce anomaly(δCe =0. 219)of chrysocolla and no Ce anomaly(δCe =0. 949)of dioptase are possibly due to their different crystal structures. Chrysocolla and dioptase inherit the REEs characteristics of the source rocks. These two minerals were formed by fluid-rock interaction under the same oxidized condition.