18632_arar-437.csv (23.63 kB)

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

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posted on 21.06.2016 by L. E. Morgan, D. F. Mark, J. Imlach, D. Barfod, R. Dymock

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.

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