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40Ar/39Ar analysis of sample 90-Hens

Dates

Dataset Reference Date
2020-12-28
Info Date
1990

Summary

Samples and monitors were step heated using a Staudacher-type resistance furnance (using a coiled tungsten filament, a tantalum crucible with no liner and tungsten-rhenium thermocouple) and gas was purified continuously during extraction by two SAES ST-172 porous getters and analyzed on a MAP 516 mass spectrometer fitted with a Baur-Signer source and a Johnston MM1 multiplier with a sensitivity of 2.0 X 10^-14 molV^-1.

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Material Request Instructions

For the publication containing sample radiometric age data, see: https://dggs.alaska.gov/pubs/id/17686

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  • ReSciColl Archive

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Type Scheme Key
title Parent-4f4e49d8e4b07f02db5df185 40Ar/39Ar analysis of sample 90-Hens

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 Geological Society of London Supplementary Publication 154, p. 212

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