Universität zu Köln

Nasdala, Lutz, Corfu, Fernando, Valley, John W. ORCID: 0000-0003-3530-2722, Spicuzza, Michael J., Wu, Fu-Yuan, Li, Qiu-Li, Yang, Yue-Heng, Fisher, Chris, Muenker, Carsten, Kennedy, Allen K., Reiners, Peter W., Kronz, Andreas ORCID: 0000-0001-5655-4633, Wiedenbeck, Michael, Wirth, Richard, Chanmuang, Chutimun, Zeug, Manuela, Vaczi, Tamas, Norberg, Nicholas, Haeger, Tobias, Kroener, Alfred and Hofmeister, Wolfgang ORCID: 0000-0003-1075-7720 (2016). Zircon M127-A Homogeneous Reference Material for SIMS U-Pb Geochronology Combined with Hafnium, Oxygen and, Potentially, Lithium Isotope Analysis. Geostand. Geoanal. Res., 40 (4). S. 457 - 476. HOBOKEN: WILEY. ISSN 1751-908X

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Abstract

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 Pb-206/U-238 and 0.67676 +/- 0.00023 for Pb-207/U-235 (weighted means, 2s uncertainties). Its Pb-206/U-238 age of 524.36 +/- 0.16 Ma (95% confidence uncertainty) is concordant within the uncertainties of decay constants. The delta O-18 value (determined by laser fluorination) is 8.26 +/- 0.06 parts per thousand VSMOW (2s), and the mean Hf-176/Hf-177 ratio (determined by solution ICP-MS) is 0.282396 +/- 0.000004 (2s). The SIMS-determined delta Li-7 value is -0.6 +/- 0.9 parts per thousand (2s), with a mean mass fraction of 1.0 +/- 0.1 mu g g(-1) Li (2s). Zircon M127 contains similar to 923 mu g g(-1) U. The moderate degree of radiation damage corresponds well with the time-integrated self-irradiation dose of 1.82 x 10(18) 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.

Item Type:	Journal Article
Creators:	Creators Email ORCID ORCID Put Code Nasdala, Lutz UNSPECIFIED UNSPECIFIED UNSPECIFIED Corfu, Fernando UNSPECIFIED UNSPECIFIED UNSPECIFIED Valley, John W. UNSPECIFIED orcid.org/0000-0003-3530-2722 UNSPECIFIED Spicuzza, Michael J. UNSPECIFIED UNSPECIFIED UNSPECIFIED Wu, Fu-Yuan UNSPECIFIED UNSPECIFIED UNSPECIFIED Li, Qiu-Li UNSPECIFIED UNSPECIFIED UNSPECIFIED Yang, Yue-Heng UNSPECIFIED UNSPECIFIED UNSPECIFIED Fisher, Chris UNSPECIFIED UNSPECIFIED UNSPECIFIED Muenker, Carsten UNSPECIFIED UNSPECIFIED UNSPECIFIED Kennedy, Allen K. UNSPECIFIED UNSPECIFIED UNSPECIFIED Reiners, Peter W. UNSPECIFIED UNSPECIFIED UNSPECIFIED Kronz, Andreas UNSPECIFIED orcid.org/0000-0001-5655-4633 UNSPECIFIED Wiedenbeck, Michael UNSPECIFIED UNSPECIFIED UNSPECIFIED Wirth, Richard UNSPECIFIED UNSPECIFIED UNSPECIFIED Chanmuang, Chutimun UNSPECIFIED UNSPECIFIED UNSPECIFIED Zeug, Manuela UNSPECIFIED UNSPECIFIED UNSPECIFIED Vaczi, Tamas UNSPECIFIED UNSPECIFIED UNSPECIFIED Norberg, Nicholas UNSPECIFIED UNSPECIFIED UNSPECIFIED Haeger, Tobias UNSPECIFIED UNSPECIFIED UNSPECIFIED Kroener, Alfred UNSPECIFIED UNSPECIFIED UNSPECIFIED Hofmeister, Wolfgang UNSPECIFIED orcid.org/0000-0003-1075-7720 UNSPECIFIED
URN:	urn:nbn:de:hbz:38-254817
DOI:	10.1111/ggr.12123
Journal or Publication Title:	Geostand. Geoanal. Res.
Volume:	40
Number:	4
Page Range:	S. 457 - 476
Date:	2016
Publisher:	WILEY
Place of Publication:	HOBOKEN
ISSN:	1751-908X
Language:	English
Faculty:	Unspecified
Divisions:	Unspecified
Subjects:	no entry
Uncontrolled Keywords:	Keywords Language RARE-EARTH-ELEMENTS; RADIATION-DAMAGE; NATURAL ZIRCON; HIGH-PRECISION; LU-HF; ORIGIN; RATIOS; METAMICTIZATION; STANDARD; TIMS Multiple languages Geochemistry & Geophysics Multiple languages
Refereed:	Yes
URI:	http://kups.ub.uni-koeln.de/id/eprint/25481