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U-Pb analysis of sample 04CBV334

Dates

Dataset Reference Date
2020-12-28
Info Date
2004

Summary

Zircons were analyzed for U-Th and U-Pb geochronology with the USGS-Stanford SHRIMP RG (http://shrimprg.stanford.edu) in December 2002 (sample 02TSV060) and in a 3-day session in October 2005 (all other samples). Data are presented in Table DR1. Analysis conditions and protocol were similar to those reported by Bacon and Lowenstern (2005) except that a 16�22 nA 16O� primary beam was used and each analysis consisted of 10 scans through the mass range. The empirical U�Th fractionation factor necessary to bring the (230Th/238U) activity ratio to unity for analyzed standards and other pre-Quaternary zircons during the October 2005 session was 1.094. Following Charlier et al. (2005), we assigned this factor a conservative 1sigma uncertainty [...]

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For the publication containing sample radiometric age data, see: https://dggs.alaska.gov/pubs/id/17356

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  • ReSciColl Archive

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title Parent-4f4e49d8e4b07f02db5df185 U-Pb analysis of sample 04CBV334

NGGDPP Item Extension

alternateGeometryThe coordinates are represented in North American Datum of 1927 (NAD27). Location was derived from the following method(s): Location digitized from figure 1 in Bacon, C.R., and others, 2007, Geology, v. 35, no. 6, p. 491

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