Affordable Access

Publisher Website

Terrestrial cosmogenic argon

Authors
Journal
Earth and Planetary Science Letters
0012-821X
Publisher
Elsevier
Publication Date
Volume
188
Identifiers
DOI: 10.1016/s0012-821x(01)00336-3
Keywords
  • Cosmogenic Elements
  • Argon
  • Isotopes

Abstract

Abstract Cosmogenically enriched 38Ar/ 36Ar ratios are detectable in Ca-bearing terrestrial samples, and are resolvable from a uniform background value of 0.18826±0.00018 for materials lacking nucleogenic or kinetic mass fractionation effects. Relationships between 38Ar/ 36Ar and cosmogenic 3He in apatite and fluorite are systematic but difficult to reconcile with current estimates of terrestrial production rates for 38Ar and 36Ar from Ca, suggesting that production from Cl and/or other targets is significant, or that the estimates are inaccurate. In either case, the effects of time-varying production of 36Ar from β − decay of cosmogenic 36Cl produced from Ca, K, or Cl on the 38Ar/ 36Ar ratio must be accounted for.

There are no comments yet on this publication. Be the first to share your thoughts.

Statistics

Seen <100 times
0 Comments

More articles like this

Production of cosmogenic36Cl on atmospheric argon

on Planetary and Space Science Jan 01, 1996

The production rate of cosmogenic38Ar from calcium...

on Earth and Planetary Science Le... Jan 01, 2007
More articles like this..