Pecten as a new substrate for IcPD dating: the Quaternary raised beaches in the Gulf of Corinth, Greece

Pierini, Federica, Demarchi, Beatrice, Turner, Jennifer and Penkman, Kirsty (2016) Pecten as a new substrate for IcPD dating: the Quaternary raised beaches in the Gulf of Corinth, Greece. Quaternary Geochronology, 31. pp. 40-52. ISSN 1871-1014

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Intra-crystalline protein diagenesis (IcPD), a recent development of amino acid racemization dating (AAR), is now established as a reliable geochronological tool for the Quaternary. However, extending the method to new biominerals requires extensive testing in order to provide evidence for the closed-system behaviour of the intracrystalline proteins and to assess the temporal span that can be covered. Here we present results from high-temperature experiments on the IcPD of the bivalve Pecten, demonstrating that a fraction of proteins can be isolated from a bleach-resistant mineral matrix, which effectively operates as a closed system under conditions of accelerated diagenesis in the laboratory. Analyses of Pecten from the well-dated terrace system of the Gulf of Corinth (Greece) provided a pilot test for the integrity of the intra-crystalline fraction in subfossil shells. The small sample sizes in this preliminary study preclude a full assessment of the aminostratigraphic power of Pecten IcPD, but a concordance is observedbetween the extent of IcPD and sites dating from between MIS 5 and MIS 11. We conclude that Pecten is a potentially good substrate for IcPD dating in the Mediterranean, and that the temporal limit of the technique in this area lies beyond MIS 11.

Item Type: Article
Uncontrolled Keywords: intra-crystalline proteins,pecten (scallop) shell,amino acid racemization (aar),dating,raised beaches,mediterranean
Faculty \ School: Faculty of Science > School of Environmental Sciences
UEA Research Groups: Faculty of Science > Research Groups > Geosciences
Depositing User: Pure Connector
Date Deposited: 19 Dec 2015 07:16
Last Modified: 22 Oct 2022 00:23
DOI: 10.1016/j.quageo.2015.10.006

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