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Inferences about magma sources and mantle structure from variations of ^(143)Nd/^(144)Nd

DePaolo, D. J. and Wasserburg, G. J. (1976) Inferences about magma sources and mantle structure from variations of ^(143)Nd/^(144)Nd. Geophysical Research Letters, 3 (12). pp. 743-746. ISSN 0094-8276. https://resolver.caltech.edu/CaltechAUTHORS:20131216-141125720

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Abstract

Continental flood basalts and mid-ocean ridge (MOR) tholeiitic basalts have distinctly different ^(143)Nd/^(144)Nd which may permit a priori distinction between "continental" and "oceanic" igneous rocks. Initial ^(143)Nd/^(144)Nd of continental igneous rocks through time fall on a Sm/Nd evolution curve with chondritic REE abundance ratio. These observations indicate that many continental igneous rocks are derived from a reservoir with chondritic REE pattern which may represent primary material remaining since the formation of the earth. Oceanic igneous rocks are derived from a different ancient reservoir which has Sm/Nd higher than chondritic. Initial ^(143)Nd/^(144)Nd and ^(87)Sr/^(86)Sr in young basalts from both oceans and continents show a strong correlation suggesting that Sm-Nd and Rb-Sr fractionation events in the mantle may be correlative and caused by the same process. From this correlation Rb/Sr for the earth is inferred to be 0.029.


Item Type:Article
Related URLs:
URLURL TypeDescription
http://dx.doi.org/10.1029/GL003i012p00743DOIArticle
http://onlinelibrary.wiley.com/doi/10.1029/GL003i012p00743/abstractPublisherArticle
ORCID:
AuthorORCID
Wasserburg, G. J.0000-0002-7957-8029
Additional Information:© 1976 American Geophysical Union. Received September 30, 1976, accepted November 4, 1976. We thank J. Gittins, T. Simkin, W. S. Baldridge, H. R. Bowman, W. G. Melson, G. Thompson, Tj. H. van Andel, V. Bowen, T. Bence, A. R. McBirney, A. J. Gancarz, L. T. Silver, and G. Goles for providing samples. This work was supported by NASA Grant NGL 05-002-188 and NSF Grant PHY 76-02724.
Funders:
Funding AgencyGrant Number
NASANGL 05-002-188
NSFPHY 76-02724
Other Numbering System:
Other Numbering System NameOther Numbering System ID
Caltech Division of Geological and Planetary Sciences2830
Issue or Number:12
Record Number:CaltechAUTHORS:20131216-141125720
Persistent URL:https://resolver.caltech.edu/CaltechAUTHORS:20131216-141125720
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:43029
Collection:CaltechAUTHORS
Deposited By: Ruth Sustaita
Deposited On:16 Dec 2013 23:47
Last Modified:09 Mar 2020 13:19

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