白龙山伟晶岩型锂铍铷矿云母Ar-Ar同位素年龄数据、H-O同位素数据（2024）

白云母和黑云母的40Ar/39Ar平台年龄分别为171.36±1.87Ma和172.39±1.66Ma，表明热液成矿作用持续时间约为170Ma。对ⅰ~ⅳ期矿化分离石英中的H、O同位素进行分析，计算得到ⅰ期δ18OH2O值为7.9 ~ 8.5，ⅱ期δ18OH2O值为7.1 ~ 8.0%。钠长石-石英-锂辉石阶段和锂辉石-石英阶段δ 18ov - smow值分别为13.4 ~ 13.9和12.4 ~ 12.8%，δ 18OH2O值分别为6.1 ~ 6.6和3.9 ~ 4.3%。δDfluid数据划分范围较大，ⅰ-ⅳ期δDfluid值分别为- 77.6 ~ - 88.1%、- 80.9 ~ - 94.7%、- 93.8 ~ - 91.3%、- 105.9 ~ - 95.6%。H-O同位素结果表明，早期成矿流体主要是岩浆热液，而后期（第四阶段）的成矿流体主要是地下水。流体中可能含有少量的陨石水。流体随后的不相容性可能是矿物排出和沉淀的原因之一。

The 40Ar/39Ar plateau ages of muscovite and biotite are 171.36±1.87 Ma and 172.39±1.66 Ma, respectively, indicating that the duration of hydrothermal mineralization is approximately 170 Ma. Analysis of H and O isotopes in separated quartz from stages I to IV mineralization yielded δ¹⁸O_H₂O values of 7.9–8.5‰ for stage I and 7.1–8.0‰ for stage II. The δ¹⁸O_V-SMOW values of the albite-quartz-spodumene stage and spodumene-quartz stage are 13.4–13.9‰ and 12.4–12.8‰, respectively, with corresponding δ¹⁸O_H₂O values of 6.1–6.6‰ and 3.9–4.3‰. The δD_fluid data exhibit a wide range, with δD_fluid values of −77.6 to −88.1‰, −80.9 to −94.7‰, −93.8 to −91.3‰, and −105.9 to −95.6‰ for stages I to IV, respectively. H-O isotopic results show that the early ore-forming fluids were primarily magmatic hydrothermal fluids, whereas the ore-forming fluids in the late (fourth) stage were mainly groundwater. The fluids may contain a small amount of meteoritic water. Subsequent fluid immiscibility may be one of the causes of mineral excretion and precipitation.