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U-Pb analysis of sample 81ADb14C

Dates

Dataset Reference Date
2020-12-28
Info Date
1981

Summary

Lead was extracted on a bromide-form anion-exchange column and loaded onto a single rhenium filament with silica gel and 0.1N H3PO4. U and Th were extracted on a nitrate-form anion-exchange column and loaded onto a triple rhenium filament assembly with 0.5N HNO3. Isotope ratios were measured on a NBS 30.5-cm mass spectromerer having digital control and data acquisition. Measured ratios were corrected for 0.10/a.m.u. discrimination. Lead laboratory blank ws <2 nanograms throughout the course of the study and was composed of 204Pb:206Pb:207Pb:208Pb = 1:18.7:15.6:38.7.

Attached Files

Material Request Instructions

For the publication containing sample radiometric age data, see: https://dggs.alaska.gov/pubs/id/17344

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  • ReSciColl Archive

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Type Scheme Key
title Parent-4f4e49d8e4b07f02db5df185 U-Pb analysis of sample 81ADb14C

NGGDPP Item Extension

alternateGeometryThe coordinates are represented in North American Datum of 1927 (NAD27). Location was derived from the following method(s): Provided by source document

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