(Table 2) Uranium and thorium isotopic composition, activity ratios and ages of bivalvia shells in sediment core GIK14350, northern Germany, supplement to: Lomitschka, Michael; Frank, Norbert; Mangini, Augusto (1997): Untersuchungen zur Th/U-Datierung eemzeitlicher Muscheln aus Schleswig-Holstein = U-Th dating of eemian bivalves from Schleswig-Holstein. Meyniana, 49, 85-102


A new chemical procedure for cleaning marine carbonates was applied to remove detritus as well as metaloxide contaminations of marine shells from Eemian deposits and adjoining succession of a sediment core from Dagebüll, Schleswig- Holstein. Hence, one can significantly reduce the contamination with detrital uranium and thorium. Thermal ionisation mass spectrometry was applied to determine the uranium and thorium activities used for 230Th/U dating of these shells. At least ten samples of marine bivalves of five different core sections were analysed. Samples located below a five meter thick clay layer at 19-24 m yielded an average age of 132±18 ka. Shells located above the clays at 15-20 m depth were strongly influenced by percolating groundwaters of an open system. Therefore, a reliable dating of these samples was not possible.

DOI https://doi.org/10.1594/PANGAEA.785452
Related Identifier https://doi.org/10.2312/meyniana.1997.49.85
Metadata Access https://ws.pangaea.de/oai/provider?verb=GetRecord&metadataPrefix=datacite4&identifier=oai:pangaea.de:doi:10.1594/PANGAEA.785452
Creator Lomitschka, Michael; Frank, Norbert; Mangini, Augusto
Publisher PANGAEA - Data Publisher for Earth & Environmental Science
Publication Year 1997
Rights Creative Commons Attribution 3.0 Unported
OpenAccess true
Language English
Resource Type Supplementary Dataset
Format text/tab-separated-values
Size 390 data points
Discipline Earth System Research
Spatial Coverage (8.753 LON, 54.700 LAT); Hauke-Haien-Koog, Dagebüll, Schleswig-Holstein, Germany