dc.date.accessioned | 2020-01-20T20:25:02Z | |
dc.date.available | 2020-01-20T20:25:02Z | |
dc.date.created | 2019-01-17T21:33:21Z | |
dc.date.issued | 2018 | |
dc.identifier.citation | Nasdala, L Corfu, Fernando Schoene, B. Tapster, S.R. Wall, C.J. Schmitz, M.D. Ovtcharova, M. Schaltegger, U. Kennedy, A.K. Kronz, A. Reiners, P.W. Yang, Y.-H. Wu, F.-Y. Gain, S.E.M. Griffin, W.L. Szymanowski, D. Chanmuang, C. Ende, M. Valley, J.W. Spicuzza, M.J. Wanthanachaisaeng, B. Giester, G. . GZ7 and GZ8 – Two zircon reference materials for SIMS U-Pb geochronology. Geostandards and Geoanalytical Research. 2018, 42, 431-457 | |
dc.identifier.uri | http://hdl.handle.net/10852/72342 | |
dc.description.abstract | Here, 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. | |
dc.language | EN | |
dc.rights | Attribution 4.0 International | |
dc.rights.uri | https://creativecommons.org/licenses/by/4.0/ | |
dc.title | GZ7 and GZ8 – Two zircon reference materials for SIMS U-Pb geochronology | |
dc.type | Journal article | |
dc.creator.author | Nasdala, L | |
dc.creator.author | Corfu, Fernando | |
dc.creator.author | Schoene, B. | |
dc.creator.author | Tapster, S.R. | |
dc.creator.author | Wall, C.J. | |
dc.creator.author | Schmitz, M.D. | |
dc.creator.author | Ovtcharova, M. | |
dc.creator.author | Schaltegger, U. | |
dc.creator.author | Kennedy, A.K. | |
dc.creator.author | Kronz, A. | |
dc.creator.author | Reiners, P.W. | |
dc.creator.author | Yang, Y.-H. | |
dc.creator.author | Wu, F.-Y. | |
dc.creator.author | Gain, S.E.M. | |
dc.creator.author | Griffin, W.L. | |
dc.creator.author | Szymanowski, D. | |
dc.creator.author | Chanmuang, C. | |
dc.creator.author | Ende, M. | |
dc.creator.author | Valley, J.W. | |
dc.creator.author | Spicuzza, M.J. | |
dc.creator.author | Wanthanachaisaeng, B. | |
dc.creator.author | Giester, G. | |
cristin.unitcode | 185,15,22,50 | |
cristin.unitname | Seksjon for geologi og geofysikk | |
cristin.ispublished | true | |
cristin.fulltext | original | |
cristin.qualitycode | 1 | |
dc.identifier.cristin | 1659798 | |
dc.identifier.bibliographiccitation | info:ofi/fmt:kev:mtx:ctx&ctx_ver=Z39.88-2004&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.jtitle=Geostandards and Geoanalytical Research&rft.volume=42&rft.spage=431&rft.date=2018 | |
dc.identifier.jtitle | Geostandards and Geoanalytical Research | |
dc.identifier.volume | 42 | |
dc.identifier.issue | 4 | |
dc.identifier.startpage | 431 | |
dc.identifier.endpage | 457 | |
dc.identifier.doi | https://doi.org/10.1111/ggr.12239 | |
dc.identifier.urn | URN:NBN:no-75443 | |
dc.type.document | Tidsskriftartikkel | |
dc.type.peerreviewed | Peer reviewed | |
dc.source.issn | 1639-4488 | |
dc.identifier.fulltext | Fulltext https://www.duo.uio.no/bitstream/handle/10852/72342/2/Nasdala_et_al-2018-Geostandards_and_Geoanalytical_Research.pdf | |
dc.type.version | PublishedVersion | |
dc.relation.project | NFR/223272 | |