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GZ7 and GZ8 – Two Zircon Reference Materials for SIMS U-Pb Geochronology

Author(s): Nasdala, Lutz; Corfu, Fernando; Schoene, Blair; Tapster, Simon R; Wall, Corey J; et al

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dc.contributor.authorNasdala, Lutz-
dc.contributor.authorCorfu, Fernando-
dc.contributor.authorSchoene, Blair-
dc.contributor.authorTapster, Simon R-
dc.contributor.authorWall, Corey J-
dc.contributor.authorSchmitz, Mark D-
dc.contributor.authorOvtcharova, Maria-
dc.contributor.authorSchaltegger, Urs-
dc.contributor.authorKennedy, Allen K-
dc.contributor.authorKronz, Andreas-
dc.contributor.authorReiners, Peter W-
dc.contributor.authorYang, Yue-Heng-
dc.contributor.authorWu, Fu-Yuan-
dc.contributor.authorGain, Sarah EM-
dc.contributor.authorGriffin, William L-
dc.contributor.authorSzymanowski, Dawid-
dc.contributor.authorChanmuang N, Chutimun-
dc.contributor.authorEnde, Martin-
dc.contributor.authorValley, John W-
dc.contributor.authorSpicuzza, Michael J-
dc.contributor.authorWanthanachaisaeng, Bhuwadol-
dc.contributor.authorGiester, Gerald-
dc.date.accessioned2022-01-25T14:50:18Z-
dc.date.available2022-01-25T14:50:18Z-
dc.date.issued2018-08-30en_US
dc.identifier.citationNasdala, Lutz, Fernando Corfu, Blair Schoene, Simon R. Tapster, Corey J. Wall, Mark D. Schmitz, Maria Ovtcharova et al. "GZ 7 and GZ 8–Two Zircon Reference Materials for SIMS U‐Pb Geochronology." Geostandards and Geoanalytical Research 42, no. 4 (2018): 431-457. doi:10.1111/ggr.12239.en_US
dc.identifier.issn1639-4488-
dc.identifier.urihttp://arks.princeton.edu/ark:/88435/pr1st7dw4n-
dc.description.abstractHere, we document a detailed characterisation of two zircon gemstones, GZ7 and GZ8. Both stones had the same mass at 19.2 carats (3.84 g) each; both came from placer deposits in the Ratnapura district, Sri Lanka. The U‐Pb data are in both cases concordant within the uncertainties of decay constants and yield weighted mean 206Pb/238U ages (95% confidence uncertainty) of 530.26 Ma ± 0.05 Ma (GZ7) and 543.92 Ma ± 0.06 Ma (GZ8). Neither GZ7 nor GZ8 have been subjected to any gem enhancement by heating. Structure‐related parameters correspond well with the calculated alpha doses of 1.48 × 1018 g−1 (GZ7) and 2.53 × 1018 g−1 (GZ8), respectively, and the (U‐Th)/He ages of 438 Ma ± 3 Ma (2s) for GZ7 and 426 Ma ± 9 Ma (2s) for GZ8 are typical of unheated zircon from Sri Lanka. The mean U mass fractions are 680 μg g−1 (GZ7) and 1305 μg g−1 (GZ8). The two zircon samples are proposed as reference materials for SIMS (secondary ion mass spectrometry) U‐Pb geochronology. In addition, GZ7 (Ti mass fractions 25.08 μg g−1 ± 0.18 μg g−1; 95% confidence uncertainty) may prove useful as reference material for Ti‐in‐zircon temperature estimates.en_US
dc.format.extent431 - 457en_US
dc.languageengen_US
dc.language.isoen_USen_US
dc.relation.ispartofGeostandards and Geoanalytical Researchen_US
dc.rightsFinal published version. This is an open access article.en_US
dc.titleGZ7 and GZ8 – Two Zircon Reference Materials for SIMS U-Pb Geochronologyen_US
dc.typeJournal Articleen_US
dc.identifier.doidoi:10.1111/ggr.12239-
dc.identifier.eissn1751-908X-
pu.type.symplectichttp://www.symplectic.co.uk/publications/atom-terms/1.0/journal-articleen_US

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