Zircon M257 - A homogeneous natural reference material for the ion microprobe U-Pb analysis of zircon

Lutz Nasdala, Wolfgang Hofmeister, Nicholas Norberg, James M. Martinson, Fernando Corfu, Wolfgang Dörr, Sandra L. Kamo, Allen K. Kennedy, Andreas Kronz, Peter W Reiners, Dirk Frei, Jan Kosler, Yusheng Wan, Jens Götze, Tobias Häger, Alfred Kröner, John W. Valley

Research output: Contribution to journalArticle

518 Citations (Scopus)

Abstract

We introduce and propose zircon M257 as a future reference material for the determination of zircon U-Pb ages by means of secondary ion mass spectrometry. This light brownish, flawless, cut gemstone specimen from Sri Lanka weighed 5.14 g (25.7 carats). Zircon M257 has TIMS-determined, mean isotopic ratios (2s uncertainties) of 0.09100 ± 0.00003 for 206pb/238U and 0.7392 ± 0.0003 for 207pb/235U. Its 206pb/238U age is 561.3 ± 0.3 Ma (unweighted mean, uncertainty quoted at the 95% confidence level); the U-Pb system is concordant within uncertainty of decay constants. Zircon M257 contains ∼ 840 μg g-1 U (Th/U ∼ 0.27). The material exhibits remarkably low heterogeneity, with a virtual absence of any internal textures even in cathodoluminescence images. The uniform, moderate degree of radiation damage (estimated from the expansion of unit-cell parameters, broadening of Raman spectral parameters and density) corresponds well, within the "Sri Lankan trends", with actinide concentrations, U-Pb age, and the calculated alpha fluence of 1.66 × 1018 g-1. This, and a (U+Th)/He age of 419 ± 9 Ma (2s), enables us to exclude any unusual thermal history or heat treatment, which could potentially have affected the retention of radiogenic Pb. The oxygen isotope ratio of this zircon is 13.9‰ VSMOW suggesting a metamorphic genesis in a marble or calc-silicate skarn.

Original languageEnglish (US)
Pages (from-to)247-265
Number of pages19
JournalGeostandards and Geoanalytical Research
Volume32
Issue number3
DOIs
StatePublished - 2008

Fingerprint

ion microprobe
zircon
Ions
Oxygen Isotopes
Actinoid Series Elements
gemstone
radiation damage
Silicates
oxygen isotope ratio
actinide
Cathodoluminescence
cathodoluminescence
Calcium Carbonate
skarn
Radiation damage
Secondary ion mass spectrometry
isotopic ratio
marble
silicate
mass spectrometry

Keywords

  • Geochronology
  • M257
  • Reference material
  • Secondary ion mass spectrometry
  • SIMS
  • U-Pb
  • Zircon

ASJC Scopus subject areas

  • Geochemistry and Petrology
  • Geology

Cite this

Nasdala, L., Hofmeister, W., Norberg, N., Martinson, J. M., Corfu, F., Dörr, W., ... Valley, J. W. (2008). Zircon M257 - A homogeneous natural reference material for the ion microprobe U-Pb analysis of zircon. Geostandards and Geoanalytical Research, 32(3), 247-265. https://doi.org/10.1111/j.1751-908X.2008.00914.x

Zircon M257 - A homogeneous natural reference material for the ion microprobe U-Pb analysis of zircon. / Nasdala, Lutz; Hofmeister, Wolfgang; Norberg, Nicholas; Martinson, James M.; Corfu, Fernando; Dörr, Wolfgang; Kamo, Sandra L.; Kennedy, Allen K.; Kronz, Andreas; Reiners, Peter W; Frei, Dirk; Kosler, Jan; Wan, Yusheng; Götze, Jens; Häger, Tobias; Kröner, Alfred; Valley, John W.

In: Geostandards and Geoanalytical Research, Vol. 32, No. 3, 2008, p. 247-265.

Research output: Contribution to journalArticle

Nasdala, L, Hofmeister, W, Norberg, N, Martinson, JM, Corfu, F, Dörr, W, Kamo, SL, Kennedy, AK, Kronz, A, Reiners, PW, Frei, D, Kosler, J, Wan, Y, Götze, J, Häger, T, Kröner, A & Valley, JW 2008, 'Zircon M257 - A homogeneous natural reference material for the ion microprobe U-Pb analysis of zircon', Geostandards and Geoanalytical Research, vol. 32, no. 3, pp. 247-265. https://doi.org/10.1111/j.1751-908X.2008.00914.x
Nasdala, Lutz ; Hofmeister, Wolfgang ; Norberg, Nicholas ; Martinson, James M. ; Corfu, Fernando ; Dörr, Wolfgang ; Kamo, Sandra L. ; Kennedy, Allen K. ; Kronz, Andreas ; Reiners, Peter W ; Frei, Dirk ; Kosler, Jan ; Wan, Yusheng ; Götze, Jens ; Häger, Tobias ; Kröner, Alfred ; Valley, John W. / Zircon M257 - A homogeneous natural reference material for the ion microprobe U-Pb analysis of zircon. In: Geostandards and Geoanalytical Research. 2008 ; Vol. 32, No. 3. pp. 247-265.
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abstract = "We introduce and propose zircon M257 as a future reference material for the determination of zircon U-Pb ages by means of secondary ion mass spectrometry. This light brownish, flawless, cut gemstone specimen from Sri Lanka weighed 5.14 g (25.7 carats). Zircon M257 has TIMS-determined, mean isotopic ratios (2s uncertainties) of 0.09100 ± 0.00003 for 206pb/238U and 0.7392 ± 0.0003 for 207pb/235U. Its 206pb/238U age is 561.3 ± 0.3 Ma (unweighted mean, uncertainty quoted at the 95{\%} confidence level); the U-Pb system is concordant within uncertainty of decay constants. Zircon M257 contains ∼ 840 μg g-1 U (Th/U ∼ 0.27). The material exhibits remarkably low heterogeneity, with a virtual absence of any internal textures even in cathodoluminescence images. The uniform, moderate degree of radiation damage (estimated from the expansion of unit-cell parameters, broadening of Raman spectral parameters and density) corresponds well, within the {"}Sri Lankan trends{"}, with actinide concentrations, U-Pb age, and the calculated alpha fluence of 1.66 × 1018 g-1. This, and a (U+Th)/He age of 419 ± 9 Ma (2s), enables us to exclude any unusual thermal history or heat treatment, which could potentially have affected the retention of radiogenic Pb. The oxygen isotope ratio of this zircon is 13.9‰ VSMOW suggesting a metamorphic genesis in a marble or calc-silicate skarn.",
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AU - Nasdala, Lutz

AU - Hofmeister, Wolfgang

AU - Norberg, Nicholas

AU - Martinson, James M.

AU - Corfu, Fernando

AU - Dörr, Wolfgang

AU - Kamo, Sandra L.

AU - Kennedy, Allen K.

AU - Kronz, Andreas

AU - Reiners, Peter W

AU - Frei, Dirk

AU - Kosler, Jan

AU - Wan, Yusheng

AU - Götze, Jens

AU - Häger, Tobias

AU - Kröner, Alfred

AU - Valley, John W.

PY - 2008

Y1 - 2008

N2 - We introduce and propose zircon M257 as a future reference material for the determination of zircon U-Pb ages by means of secondary ion mass spectrometry. This light brownish, flawless, cut gemstone specimen from Sri Lanka weighed 5.14 g (25.7 carats). Zircon M257 has TIMS-determined, mean isotopic ratios (2s uncertainties) of 0.09100 ± 0.00003 for 206pb/238U and 0.7392 ± 0.0003 for 207pb/235U. Its 206pb/238U age is 561.3 ± 0.3 Ma (unweighted mean, uncertainty quoted at the 95% confidence level); the U-Pb system is concordant within uncertainty of decay constants. Zircon M257 contains ∼ 840 μg g-1 U (Th/U ∼ 0.27). The material exhibits remarkably low heterogeneity, with a virtual absence of any internal textures even in cathodoluminescence images. The uniform, moderate degree of radiation damage (estimated from the expansion of unit-cell parameters, broadening of Raman spectral parameters and density) corresponds well, within the "Sri Lankan trends", with actinide concentrations, U-Pb age, and the calculated alpha fluence of 1.66 × 1018 g-1. This, and a (U+Th)/He age of 419 ± 9 Ma (2s), enables us to exclude any unusual thermal history or heat treatment, which could potentially have affected the retention of radiogenic Pb. The oxygen isotope ratio of this zircon is 13.9‰ VSMOW suggesting a metamorphic genesis in a marble or calc-silicate skarn.

AB - We introduce and propose zircon M257 as a future reference material for the determination of zircon U-Pb ages by means of secondary ion mass spectrometry. This light brownish, flawless, cut gemstone specimen from Sri Lanka weighed 5.14 g (25.7 carats). Zircon M257 has TIMS-determined, mean isotopic ratios (2s uncertainties) of 0.09100 ± 0.00003 for 206pb/238U and 0.7392 ± 0.0003 for 207pb/235U. Its 206pb/238U age is 561.3 ± 0.3 Ma (unweighted mean, uncertainty quoted at the 95% confidence level); the U-Pb system is concordant within uncertainty of decay constants. Zircon M257 contains ∼ 840 μg g-1 U (Th/U ∼ 0.27). The material exhibits remarkably low heterogeneity, with a virtual absence of any internal textures even in cathodoluminescence images. The uniform, moderate degree of radiation damage (estimated from the expansion of unit-cell parameters, broadening of Raman spectral parameters and density) corresponds well, within the "Sri Lankan trends", with actinide concentrations, U-Pb age, and the calculated alpha fluence of 1.66 × 1018 g-1. This, and a (U+Th)/He age of 419 ± 9 Ma (2s), enables us to exclude any unusual thermal history or heat treatment, which could potentially have affected the retention of radiogenic Pb. The oxygen isotope ratio of this zircon is 13.9‰ VSMOW suggesting a metamorphic genesis in a marble or calc-silicate skarn.

KW - Geochronology

KW - M257

KW - Reference material

KW - Secondary ion mass spectrometry

KW - SIMS

KW - U-Pb

KW - Zircon

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