Uranium in scleractinian coral skeletons
Identifieur interne : 001877 ( Main/Exploration ); précédent : 001876; suivant : 001878Uranium in scleractinian coral skeletons
Auteurs : P. K. Swart [Royaume-Uni] ; J. A. E. B. Hubbard [Royaume-Uni]Source :
- Coral Reefs [ 0722-4028 ] ; 1982-06-01.
Abstract
Abstract: Accurate determinations have been made of the distribution of uranium in fresh and diagenetically altered coral skeletons occurring both naturally and grown under a variety of experimental conditions. Whereas live coral skeletons are homogeneous in uranium distribution, dead skeletons show heterogeneities relating to lithothamnioid algal encrustations and endolithic sponges. In the analyses of over 100 live coral skeletons, no zonal uranium distributions, described by previous workers, were found. In skeletons, free from organic material, uranium was found to exchange readily with the coral skeleton and/or to be precipitated along trabecular axes and skeletal margins. Bioeroded specimens contained higher uranium concentrations than freshly formed aragonite; they were similar to fossil coral skeletons used by previous researchers for uranium scrics dating.
Url:
DOI: 10.1007/BF00286535
Affiliations:
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K." last="Swart">P. K. Swart</name><affiliation wicri:level="4"><country xml:lang="fr">Royaume-Uni</country><wicri:regionArea>Department of Geology, King's College, University of London, WC2R 2LS, London</wicri:regionArea><placeName><settlement type="city">Londres</settlement><region type="country">Angleterre</region><region type="région" nuts="1">Grand Londres</region></placeName><orgName type="university">Université de Londres</orgName></affiliation></author><author><name sortKey="Hubbard, J A E B" sort="Hubbard, J A E B" uniqKey="Hubbard J" first="J. A. E. B." last="Hubbard">J. A. E. B. 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Whereas live coral skeletons are homogeneous in uranium distribution, dead skeletons show heterogeneities relating to lithothamnioid algal encrustations and endolithic sponges. In the analyses of over 100 live coral skeletons, no zonal uranium distributions, described by previous workers, were found. In skeletons, free from organic material, uranium was found to exchange readily with the coral skeleton and/or to be precipitated along trabecular axes and skeletal margins. Bioeroded specimens contained higher uranium concentrations than freshly formed aragonite; they were similar to fossil coral skeletons used by previous researchers for uranium scrics dating.</div></front></TEI><affiliations><list><country><li>Royaume-Uni</li></country><region><li>Angleterre</li><li>Grand Londres</li></region><settlement><li>Londres</li></settlement><orgName><li>Université de Londres</li></orgName></list><tree><country name="Royaume-Uni"><region name="Angleterre"><name sortKey="Swart, P K" sort="Swart, P K" uniqKey="Swart P" first="P. K." last="Swart">P. K. Swart</name></region><name sortKey="Hubbard, J A E B" sort="Hubbard, J A E B" uniqKey="Hubbard J" first="J. A. E. B." last="Hubbard">J. A. E. B. Hubbard</name></country></tree></affiliations></record>Pour manipuler ce document sous Unix (Dilib)
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