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U-Pb analysis of sample 78AFrAG5

Dates

Dataset Reference Date
2020-12-28
Info Date
1978

Summary

Standard techniques for analysis of U, Th, and Pb, including ion-exhange chemistry and mass spectrometry. Dissolution and iion-exchange chemistry were modified from Krogn (1973). Isotopic ratios were measured on a 12-in. NBS mass spectrometer with on-line digital processing. Lead was measured on a single rhenium filament, using H3PO4 and silica gell, and uranium and thorium were measured by surface emission, using a triple rhenium filament assembly.

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Material Request Instructions

For the publication containing sample radiometric age data, see: https://dggs.alaska.gov/pubs/id/13428

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  • ReSciColl Archive

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Type Scheme Key
title Parent-4f4e49d8e4b07f02db5df185 U-Pb analysis of sample 78AFrAG5

NGGDPP Item Extension

alternateGeometryThe coordinates are represented in North American Datum of 1927 (NAD27). Location was derived from the following method(s): Location given in USGS document C 823-B

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