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A two-reservoir recycling model for mantle-crust evolution

Jacobsen, S. B. and Wasserburg, G. J. (1980) A two-reservoir recycling model for mantle-crust evolution. Proceedings of the National Academy of Sciences of the United States of America, 77 (11). pp. 6298-6302. ISSN 0027-8424. http://resolver.caltech.edu/CaltechAUTHORS:JACpnas80

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Abstract

The exact solutions for the isotopic compositions and the concentrations of the two-reservoir model for mantle-crust evolution are given for arbitrary rates of crustal growth and of back flow to the mantle. The critical parameters are the chemical fractionation factors for crustal growth and refluxing and the integrated fractional mass-removal rates from the crust and the mantle. For the case where refluxing is proportional to crustal growth, all the solutions reduce to simple analytic expressions. The expression for the mean age of the mass of the crust with refluxing is given. If refluxing is significant, the model shows that highly incompatible elements have short residence times in the mantle. With plausible concentration values, material balance implies that the continents were derived from only a small fraction of the mantle.


Item Type:Article
Additional Information:© 1980 by the National Academy of Sciences. Contributed by G.J. Wasserburg, July 31, 1980. This work has been supported by National Science Foundation Grant EAR 76-22494 and National Aeronautics and Space Administration Grant NGL 05-002-188. Division [of Geological and Planetary Sciences] Contribution Number 3477 (363). The publication costs of this article were defrayed in part by page charge payment. This article must therefore be hereby marked "advertisement" in accordance with 18 U. S. C. §1734 solely to indicate this fact.
Subject Keywords:mantle depletion; crustal growth; trace elements; neodymium isotopes; strontium isotopes
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Other Numbering System NameOther Numbering System ID
Caltech Division of Geological and Planetary Sciences3477
Lunatic Asylum Lab363
Record Number:CaltechAUTHORS:JACpnas80
Persistent URL:http://resolver.caltech.edu/CaltechAUTHORS:JACpnas80
Alternative URL:http://www.pnas.org/cgi/content/abstract/77/11/6298
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:10039
Collection:CaltechAUTHORS
Deposited By: Tony Diaz
Deposited On:08 Apr 2008
Last Modified:14 Nov 2014 19:20

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