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U-Pb analysis of sample 01KD57A

Dates

Dataset Reference Date
2020-12-28
Info Date
2001

Summary

Pb and U were eluted sequentially into the same beaker followed by the addition of ~10 ul of 0.6N ultra pure phosphoric acid. Each sample was loaded onto a single zone refined Re filament using a phosphoric acid-silica gel emitter (SiCl4). Isotopic ratios were measured using a modified single collector VG-54R thermal ionization mass spectrometer equipped with an analogue Daly photomultiplier. Both U and Pb, respectively, were run at 1450�C, in peak-switching mode on the Daly detector. U fractionation was determined directly on individual runs using the 233-235U tracer, and Pb isotopic ratios were corrected for fractionation of 0.37%/amu, based on replicate analyses of the NBS-981 Pb standard and the values recommended by Thirlwall [...]

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For the publication containing sample radiometric age data, see: https://dggs.alaska.gov/pubs/id/17406

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  • ReSciColl Archive

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Type Scheme Key
title Parent-4f4e49d8e4b07f02db5df185 U-Pb analysis of sample 01KD57A

NGGDPP Item Extension

alternateGeometryThe coordinates are represented in North American Datum of 1927 (NAD27). Location was derived from the following method(s): Location provided in GSA Bulletin, v. 118, no. 11/12, p. 1371

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