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FCs-EK: a new sampling of the Fish Canyon Tuff 40Ar/39Ar neutron flux monitor

By
L. E. Morgan
L. E. Morgan
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D. F. Mark
D. F. Mark
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J. Imlach
J. Imlach
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D. Barfod
D. Barfod
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R. Dymock
R. Dymock
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Published:
January 01, 2014

Abstract

Sanidine from the Fish Canyon Tuff is regularly used as a neutron flux monitor by 40Ar/39Ar geochronologists. A new sampling of the Fish Canyon Tuff (denoted FCs-EK) has yielded sanidine that relative to FC-2 is confirmed here to have an R value of 0.9997±0.0100, which is indistinguishable from 1. The new sample will allow for continuity as many 40Ar/39Ar laboratories have exhausted their supplies of FC-2. FCs-EK is now available in significant quantities from the Scottish Universities Environmental Research Centre.

Supplementary material:

A table of Ar isotopic data is available at http://www.geolsoc.org.uk/SUP18632.

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Contents

Geological Society, London, Special Publications

Advances in 40Ar/39Ar Dating: From Archaeology to Planetary Sciences

F. Jourdan
F. Jourdan
Curtin University, Australia
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D. F. Mark
D. F. Mark
Scottish Universities Environmental Research Centre, UK
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C. Verati
C. Verati
University of Nice, France
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Geological Society of London
Volume
378
ISBN electronic:
9781862396623
Publication date:
January 01, 2014

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