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Sm-Nd in marine carbonates and phosphates - Implications for Nd isotopes in seawater and crustal agesThe possibility of establishing a record of variations in the isotopic composition of Nd in seawater over geologic time is explored. To construct such a record, a phase must be identified which incorporated Nd with the same isotopic composition as seawater at the time of its formation, preserves that composition, and which is relatively common in sediments. To evaluate the suitability of carbonates and phosphates, the Rb, Sr, Sm, and Nd concentrations and the Nd and Sr isotopic composition of a variety of modern and ancient marine calcite, aragonite, and apatite samples have been measured and the results are presented and discussed.
Document ID
19850045219
Acquisition Source
Legacy CDMS
Document Type
Reprint (Version printed in journal)
Authors
Shaw, H. F.
(California, University Livermore; California Institute of Technology, Pasadena, CA, United States)
Wasserburg, G. J.
(California Institute of Technology Pasadena, CA, United States)
Date Acquired
August 12, 2013
Publication Date
February 1, 1985
Publication Information
Publication: Geochimica et Cosmochimica Acta
Volume: 49
ISSN: 0016-7037
Subject Category
Geophysics
Accession Number
85A27370
Funding Number(s)
CONTRACT_GRANT: NSF PHY-82-15500
CONTRACT_GRANT: NAG9-43
Distribution Limits
Public
Copyright
Other

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