Apen Francisco E, Gaynor Sean P, Schoene Blair
Geosciences Department, Princeton University, Princeton, NJ 08544, United States.
School of Earth and Sustainability, Northern Arizona University, Flagstaff, AZ 86011, United States.
Data Brief. 2025 Mar 24;60:111464. doi: 10.1016/j.dib.2025.111464. eCollection 2025 Jun.
New isotope dilution thermal ionization mass spectrometry U-Pb data for Emerald Lake apatite demonstrate its potential as a reference material for geochronology. A three-dimensional U/Pb-Pb/Pb-Pb/Pb isochron produces a 95.2 ± 1.1 Ma date with an initial Pb isotopic composition of Pb/Pb = 18.85 ± 0.19 and Pb/Pb = 15.68 ± 0.10 (n = 5, MSWD = 9.5). These data yield a weighted mean initial Pb-corrected Pb/U date of 95.18 ± 0.10 Ma (n = 5, MSWD = 1.5) and a weighted mean initial Pb-corrected Pb/U date of 95.20 ± 0.17 Ma (n = 5, MSWD = 0.5). The new high-precision U-Pb age of Emerald Lake apatite further enables its utility as a reference material for U-Pb apatite geochronology. Aliquots of Emerald Lake apatite are available for distribution for use in future studies.
翡翠湖磷灰石的新同位素稀释热电离质谱U-Pb数据表明其作为地质年代学参考物质的潜力。三维U/Pb-Pb/Pb-Pb/Pb等时线得出的年龄为95.2±1.1 Ma，初始铅同位素组成为Pb/Pb = 18.85±0.19和Pb/Pb = 15.68±0.10（n = 5，MSWD = 9.5）。这些数据得出加权平均初始铅校正后的Pb/U年龄为95.18±0.10 Ma（n = 5，MSWD = 1.5），以及加权平均初始铅校正后的Pb/U年龄为95.20±0.17 Ma（n = 5，MSWD = 0.5）。翡翠湖磷灰石新的高精度U-Pb年龄进一步使其能够作为U-Pb磷灰石地质年代学的参考物质。可提供翡翠湖磷灰石的等分试样用于未来研究的分发。
