High-precision U-Pb data and reference age for Emerald Lake apatite
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Abstract
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 238U/206Pb-207Pb/206Pb-204Pb/206Pb isochron produces a 95.2 ± 1.1 Ma date with an initial Pb isotopic composition of 206Pb/204Pb = 18.85 ± 0.19 and 207Pb/204Pb = 15.68 ± 0.10 (n = 5, MSWD = 9.5). These data yield a weighted mean initial Pb-corrected 206Pb/238U date of 95.18 ± 0.10 Ma (n = 5, MSWD = 1.5) and a weighted mean initial Pb-corrected 207Pb/235U 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 in situ U-Pb apatite geochronology. Aliquots of Emerald Lake apatite are available for distribution for use in future studies.
| Publication type | Article |
|---|---|
| Publication Subtype | Journal Article |
| Title | High-precision U-Pb data and reference age for Emerald Lake apatite |
| Series title | Data in Brief |
| DOI | 10.1016/j.dib.2025.111464 |
| Volume | 60 |
| Publication Date | April 02, 202 |
| Year Published | 2025 |
| Language | English |
| Publisher | Elsevier |
| Contributing office(s) | Geology, Geophysics, and Geochemistry Science Center |
| Description | 111464, 7 p. |