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Determination of an internal ⁸⁷Rb-⁸⁷Sr isochron for the Olivenza chondrite

Sanz, H. G. and Wasserburg, G. J. (1969) Determination of an internal ⁸⁷Rb-⁸⁷Sr isochron for the Olivenza chondrite. Earth and Planetary Science Letters, 6 (5). pp. 335-345. ISSN 0012-821X. doi:10.1016/0012-821x(69)90182-4.

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Rb-Sr isotopic determinations were made on five single chondrules, ranging from 4 to 27 milligrams, extracted from Olivenza, an olivine-hypersthene chondrite. Several density fractions with a particle size smaller than 37μ were separated and Rb-Sr analyses made. These data form a well defined linear array on the Sr-Rb evolution diagram and yield an age of 4.63 × 10⁹ years and an initial ⁸⁷Sr⁸⁶Sr = 0.6994. The typical strontium and rubidium blanks were 8 × 10⁻¹⁰ and 4 × 10⁻¹¹ g, respectively. An acid wash experiment shows that preferential leaching takes place and that the resulting data from such a procedure are of doubtful reliability. Constructing an error envelope of the data points, a graphical representation of the initial ⁸⁷Sr⁸⁶Sr versus the age is presented which demonstrates the constraints on these two anticorrelated parameters. This is a useful means of testing whether two data arrays may have the same age and (⁸⁷Sr⁸⁶Sr)_I.

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Wasserburg, G. J.0000-0002-7957-8029
Alternate Title:Determination of an internal 87Rb-87Sr isochron for the Olivenza chondrite
Additional Information:© 1969 Published by Elsevier B.V. Received 28 April 1969. We wish to thank Dr. F.Hernandez Pacheco and Dr. J.M. Fuster of the Museo Nacional de Ciencias Naturales de Madrid for their generosity in supplying samples of the meteorites which were used in this study. The microprobe analyses reported here were done by A. Chodos using the procedure described by Bence and Albee [24]. We were privileged to have many valuable discussions with D.S. Burnett. This research was sponsored by the Comision Nacional para la Investigacion del Espacio de Espana and the National Aeronautics and Space Administration. The senior author carried out this work during his tenure as an International NASA Fellow.
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Comision Nacional para la Investigacion del EspacioUNSPECIFIED
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Caltech Division of Geological Sciences1627
Issue or Number:5
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Official Citation:H.G. Sanz, G.J. Wasserburg, Determination of an internal 87Rb-87Sr isochron for the Olivenza chondrite, Earth and Planetary Science Letters, Volume 6, Issue 5, 1969, Pages 335-345, ISSN 0012-821X,
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:115131
Deposited By: Tony Diaz
Deposited On:10 Jun 2022 23:16
Last Modified:13 Jun 2022 17:05

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