Zircon M127 - A Homogeneous Reference Material for SIMS U-Pb Geochronology Combined with Hafnium, Oxygen and, Potentially, Lithium Isotope Analysis
In this article, we document a detailed analytical characterisation of zircon M127, a homogeneous 12.7 carat gemstone from Ratnapura, Sri Lanka. Zircon M127 has TIMS-determined mean U-Pb radiogenic isotopic ratios of 0.084743 ± 0.000027 for 206Pb/238U and 0.67676 ± 0.00023 for 207Pb/235U (weighted m...
| Main Authors: | , , , , , , , , , , , , , , , , , , , , |
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| Format: | Journal Article |
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Wiley-Blackwell Publishing
2016
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| Online Access: | http://hdl.handle.net/20.500.11937/10350 |
| _version_ | 1848746208962543616 |
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| author | Nasdala, L. Corfu, F. Valley, J. Spicuzza, M. Wu, F. Li, Q. Yang, Y. Fisher, C. Münker, C. Kennedy, Allen Reiners, P. Kronz, A. Wiedenbeck, M. Wirth, R. Chanmuang, C. Zeug, M. Váczi, T. Norberg, N. Häger, T. Kröner, A. Hofmeister, W. |
| author_facet | Nasdala, L. Corfu, F. Valley, J. Spicuzza, M. Wu, F. Li, Q. Yang, Y. Fisher, C. Münker, C. Kennedy, Allen Reiners, P. Kronz, A. Wiedenbeck, M. Wirth, R. Chanmuang, C. Zeug, M. Váczi, T. Norberg, N. Häger, T. Kröner, A. Hofmeister, W. |
| author_sort | Nasdala, L. |
| building | Curtin Institutional Repository |
| collection | Online Access |
| description | In this article, we document a detailed analytical characterisation of zircon M127, a homogeneous 12.7 carat gemstone from Ratnapura, Sri Lanka. Zircon M127 has TIMS-determined mean U-Pb radiogenic isotopic ratios of 0.084743 ± 0.000027 for 206Pb/238U and 0.67676 ± 0.00023 for 207Pb/235U (weighted means, 2s uncertainties). Its 206Pb/238U age of 524.36 ± 0.16 Ma (95% confidence uncertainty) is concordant within the uncertainties of decay constants. The d18O value (determined by laser fluorination) is 8.26 ± 0.06‰ VSMOW (2s), and the mean 176Hf/177Hf ratio (determined by solution ICP-MS) is 0.282396 ± 0.000004 (2s). The SIMS-determined d7Li value is -0.6 ± 0.9‰ (2s), with a mean mass fraction of 1.0 ± 0.1 µg g-1 Li (2s). Zircon M127 contains ~ 923 µg g-1 U. The moderate degree of radiation damage corresponds well with the time-integrated self-irradiation dose of 1.82 × 1018 alpha events per gram. This observation, and the (U-Th)/He age of 426 ± 7 Ma (2s), which is typical of unheated Sri Lankan zircon, enable us to exclude any thermal treatment. Zircon M127 is proposed as a reference material for the determination of zircon U-Pb ages by means of SIMS in combination with hafnium and stable isotope (oxygen and potentially also lithium) determination. |
| first_indexed | 2025-11-14T06:29:36Z |
| format | Journal Article |
| id | curtin-20.500.11937-10350 |
| institution | Curtin University Malaysia |
| institution_category | Local University |
| last_indexed | 2025-11-14T06:29:36Z |
| publishDate | 2016 |
| publisher | Wiley-Blackwell Publishing |
| recordtype | eprints |
| repository_type | Digital Repository |
| spelling | curtin-20.500.11937-103502019-02-19T05:35:29Z Zircon M127 - A Homogeneous Reference Material for SIMS U-Pb Geochronology Combined with Hafnium, Oxygen and, Potentially, Lithium Isotope Analysis Nasdala, L. Corfu, F. Valley, J. Spicuzza, M. Wu, F. Li, Q. Yang, Y. Fisher, C. Münker, C. Kennedy, Allen Reiners, P. Kronz, A. Wiedenbeck, M. Wirth, R. Chanmuang, C. Zeug, M. Váczi, T. Norberg, N. Häger, T. Kröner, A. Hofmeister, W. In this article, we document a detailed analytical characterisation of zircon M127, a homogeneous 12.7 carat gemstone from Ratnapura, Sri Lanka. Zircon M127 has TIMS-determined mean U-Pb radiogenic isotopic ratios of 0.084743 ± 0.000027 for 206Pb/238U and 0.67676 ± 0.00023 for 207Pb/235U (weighted means, 2s uncertainties). Its 206Pb/238U age of 524.36 ± 0.16 Ma (95% confidence uncertainty) is concordant within the uncertainties of decay constants. The d18O value (determined by laser fluorination) is 8.26 ± 0.06‰ VSMOW (2s), and the mean 176Hf/177Hf ratio (determined by solution ICP-MS) is 0.282396 ± 0.000004 (2s). The SIMS-determined d7Li value is -0.6 ± 0.9‰ (2s), with a mean mass fraction of 1.0 ± 0.1 µg g-1 Li (2s). Zircon M127 contains ~ 923 µg g-1 U. The moderate degree of radiation damage corresponds well with the time-integrated self-irradiation dose of 1.82 × 1018 alpha events per gram. This observation, and the (U-Th)/He age of 426 ± 7 Ma (2s), which is typical of unheated Sri Lankan zircon, enable us to exclude any thermal treatment. Zircon M127 is proposed as a reference material for the determination of zircon U-Pb ages by means of SIMS in combination with hafnium and stable isotope (oxygen and potentially also lithium) determination. 2016 Journal Article http://hdl.handle.net/20.500.11937/10350 10.1111/ggr.12123 Wiley-Blackwell Publishing fulltext |
| spellingShingle | Nasdala, L. Corfu, F. Valley, J. Spicuzza, M. Wu, F. Li, Q. Yang, Y. Fisher, C. Münker, C. Kennedy, Allen Reiners, P. Kronz, A. Wiedenbeck, M. Wirth, R. Chanmuang, C. Zeug, M. Váczi, T. Norberg, N. Häger, T. Kröner, A. Hofmeister, W. Zircon M127 - A Homogeneous Reference Material for SIMS U-Pb Geochronology Combined with Hafnium, Oxygen and, Potentially, Lithium Isotope Analysis |
| title | Zircon M127 - A Homogeneous Reference Material for SIMS U-Pb Geochronology Combined with Hafnium, Oxygen and, Potentially, Lithium Isotope Analysis |
| title_full | Zircon M127 - A Homogeneous Reference Material for SIMS U-Pb Geochronology Combined with Hafnium, Oxygen and, Potentially, Lithium Isotope Analysis |
| title_fullStr | Zircon M127 - A Homogeneous Reference Material for SIMS U-Pb Geochronology Combined with Hafnium, Oxygen and, Potentially, Lithium Isotope Analysis |
| title_full_unstemmed | Zircon M127 - A Homogeneous Reference Material for SIMS U-Pb Geochronology Combined with Hafnium, Oxygen and, Potentially, Lithium Isotope Analysis |
| title_short | Zircon M127 - A Homogeneous Reference Material for SIMS U-Pb Geochronology Combined with Hafnium, Oxygen and, Potentially, Lithium Isotope Analysis |
| title_sort | zircon m127 - a homogeneous reference material for sims u-pb geochronology combined with hafnium, oxygen and, potentially, lithium isotope analysis |
| url | http://hdl.handle.net/20.500.11937/10350 |