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Terrestrial cosmogenic argon

Renne, Paul R. and Farley, Kenneth A. and Becker, Tim A. and Sharp, Warren D. (2001) Terrestrial cosmogenic argon. Earth and Planetary Science Letters, 188 (3-4). pp. 435-440. ISSN 0012-821X. https://resolver.caltech.edu/CaltechAUTHORS:20121113-130518124

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Abstract

Cosmogenically enriched ^(38)Ar/^(36)Ar 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 ^(38)Ar/^(36)Ar and cosmogenic ^3He in apatite and fluorite are systematic but difficult to reconcile with current estimates of terrestrial production rates for ^(38)Ar and ^(36)Ar 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 ^(36)Ar from β^− decay of cosmogenic ^(36)Cl produced from Ca, K, or Cl on the ^(38)Ar/^(36)Ar ratio must be accounted for.


Item Type:Article
Related URLs:
URLURL TypeDescription
http://dx.doi.org/10.1016/S0012-821X(01)00336-3DOIUNSPECIFIED
http://www.sciencedirect.com/science/article/pii/S0012821X01003363PublisherUNSPECIFIED
Additional Information:© 2001 Elsevier Science B.V. Received 28 December 2000; accepted 3 April 2001. We thank the Hawaii Scientific Drilling Project, J.N. Christensen and J.J. Donovan for various 'baseline' samples; P.G. Fitzgerald for the Trans-antarctic samples; B.M. Kennedy, K. Min and K.B. Knight for discussion and suggestions on the manuscript; F.M. Phillips for a preprint of a paper cited herein; D. Lal and an anonymous referee for constructive reviews of the manuscript. We dedicate this paper to the late Prof. John H. Reynolds.[EB]
Subject Keywords:cosmogenic elements; argon; isotopes
Issue or Number:3-4
Record Number:CaltechAUTHORS:20121113-130518124
Persistent URL:https://resolver.caltech.edu/CaltechAUTHORS:20121113-130518124
Official Citation:Paul R. Renne, Kenneth A. Farley, Tim A. Becker, Warren D. Sharp, Terrestrial cosmogenic argon, Earth and Planetary Science Letters, Volume 188, Issues 3–4, 15 June 2001, Pages 435-440, ISSN 0012-821X, 10.1016/S0012-821X(01)00336-3. (http://www.sciencedirect.com/science/article/pii/S0012821X01003363)
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:35437
Collection:CaltechAUTHORS
Deposited By: Ruth Sustaita
Deposited On:13 Nov 2012 21:25
Last Modified:03 Oct 2019 04:28

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