Geochronological Potential of Isoleucine Epimerization in Calcite Speleothems
Abstract The extent of isoleucine epimerization in a calcite speleothem was determined to evaluate the amino acid racemization method in abiotic calcite. A 5.5-cm-thick flowstone slab from Hamarnesgrotta, northern Norway, was analyzed for amino acid concentration, composition, and isoleucine epimeri...
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Cambridge University Press (CUP)
1994
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Online Access: | http://dx.doi.org/10.1006/qres.1994.1006 http://api.elsevier.com/content/article/PII:S0033589484710064?httpAccept=text/xml http://api.elsevier.com/content/article/PII:S0033589484710064?httpAccept=text/plain https://www.cambridge.org/core/services/aop-cambridge-core/content/view/S0033589400036619 |
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crcambridgeupr:10.1006/qres.1994.1006 2024-09-15T18:25:50+00:00 Geochronological Potential of Isoleucine Epimerization in Calcite Speleothems Lauritzen, Stein-Erik Erik Haugen, John Løvlie, Reidar Gilje-Nielsen, Helge 1994 http://dx.doi.org/10.1006/qres.1994.1006 http://api.elsevier.com/content/article/PII:S0033589484710064?httpAccept=text/xml http://api.elsevier.com/content/article/PII:S0033589484710064?httpAccept=text/plain https://www.cambridge.org/core/services/aop-cambridge-core/content/view/S0033589400036619 en eng Cambridge University Press (CUP) https://www.cambridge.org/core/terms Quaternary Research volume 41, issue 1, page 52-58 ISSN 0033-5894 1096-0287 journal-article 1994 crcambridgeupr https://doi.org/10.1006/qres.1994.1006 2024-07-24T04:03:14Z Abstract The extent of isoleucine epimerization in a calcite speleothem was determined to evaluate the amino acid racemization method in abiotic calcite. A 5.5-cm-thick flowstone slab from Hamarnesgrotta, northern Norway, was analyzed for amino acid concentration, composition, and isoleucine epimerization at 26 levels through the sequence. U-series dates provide an independent chronologic control. Epimerization increases monotonically with stratigraphic depth and linearily with U-series age, independent of amino acid concentrations. The rate of epimerization is calibrated against the U-series dates, and extrapolation into lower strata beyond the U-series limit yields absolute age estimates that are consistent with paleomagnetic data from the same speleothem. The results suggest that, if adequately calibrated, amino acid dating is applicable to speleothem material reaching time spans beyond the range of conventional dating methods. Amino acids in the speleothem were probably derived from surface soils and are associated with brown humic stains in the calcite. Article in Journal/Newspaper Northern Norway Cambridge University Press Quaternary Research 41 1 52 58 |
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Cambridge University Press |
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English |
description |
Abstract The extent of isoleucine epimerization in a calcite speleothem was determined to evaluate the amino acid racemization method in abiotic calcite. A 5.5-cm-thick flowstone slab from Hamarnesgrotta, northern Norway, was analyzed for amino acid concentration, composition, and isoleucine epimerization at 26 levels through the sequence. U-series dates provide an independent chronologic control. Epimerization increases monotonically with stratigraphic depth and linearily with U-series age, independent of amino acid concentrations. The rate of epimerization is calibrated against the U-series dates, and extrapolation into lower strata beyond the U-series limit yields absolute age estimates that are consistent with paleomagnetic data from the same speleothem. The results suggest that, if adequately calibrated, amino acid dating is applicable to speleothem material reaching time spans beyond the range of conventional dating methods. Amino acids in the speleothem were probably derived from surface soils and are associated with brown humic stains in the calcite. |
format |
Article in Journal/Newspaper |
author |
Lauritzen, Stein-Erik Erik Haugen, John Løvlie, Reidar Gilje-Nielsen, Helge |
spellingShingle |
Lauritzen, Stein-Erik Erik Haugen, John Løvlie, Reidar Gilje-Nielsen, Helge Geochronological Potential of Isoleucine Epimerization in Calcite Speleothems |
author_facet |
Lauritzen, Stein-Erik Erik Haugen, John Løvlie, Reidar Gilje-Nielsen, Helge |
author_sort |
Lauritzen, Stein-Erik |
title |
Geochronological Potential of Isoleucine Epimerization in Calcite Speleothems |
title_short |
Geochronological Potential of Isoleucine Epimerization in Calcite Speleothems |
title_full |
Geochronological Potential of Isoleucine Epimerization in Calcite Speleothems |
title_fullStr |
Geochronological Potential of Isoleucine Epimerization in Calcite Speleothems |
title_full_unstemmed |
Geochronological Potential of Isoleucine Epimerization in Calcite Speleothems |
title_sort |
geochronological potential of isoleucine epimerization in calcite speleothems |
publisher |
Cambridge University Press (CUP) |
publishDate |
1994 |
url |
http://dx.doi.org/10.1006/qres.1994.1006 http://api.elsevier.com/content/article/PII:S0033589484710064?httpAccept=text/xml http://api.elsevier.com/content/article/PII:S0033589484710064?httpAccept=text/plain https://www.cambridge.org/core/services/aop-cambridge-core/content/view/S0033589400036619 |
genre |
Northern Norway |
genre_facet |
Northern Norway |
op_source |
Quaternary Research volume 41, issue 1, page 52-58 ISSN 0033-5894 1096-0287 |
op_rights |
https://www.cambridge.org/core/terms |
op_doi |
https://doi.org/10.1006/qres.1994.1006 |
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Quaternary Research |
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41 |
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1 |
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52 |
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58 |
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1810466305902379008 |