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U-Pb analysis of sample 92PH62

Dates

Dataset Reference Date
2020-12-28
Info Date
1992

Summary

Isotopic analyses were performed by using a Micromass IsoProbe multicollector inductively coupled plasma mass spectrometer (MC-ICPMS) with a laser-ablation system. Laser-beam diameter was 35 micron, yielding ablation pits ~15 micron deep. All measurements were made in static mode, using Faraday detectors for 238U, 232Th, and 208-206Pb and an ion-counting channel for 204Pb. Ion yields were 0.5 mV/ppm.

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For the publication containing sample radiometric age data, see: https://dggs.alaska.gov/pubs/id/16647

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  • ReSciColl Archive

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Type Scheme Key
title Parent-4f4e49d8e4b07f02db5df185 U-Pb analysis of sample 92PH62

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 USGS Professional Paper 1709-F, Table 1, p. 3

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