Variabilidad de la relación de racemización de aminoácidos en un grupo de gasterópodos terrestres cuaternarios de Murcia
- Alessandro Giusto-Díaz de Cerio 1
- Julián García-Mayordomo 2
- Juan M. Insua-Arévalo 1
- José E. Ortiz 3
- Trinidad Torres 3
- 1 Facultad de Ciencias Geológicas (UCM), Madrid
- 2 Instituto Geológico y Minero de España (IGME), Madrid
- 3 Laboratorio de Estratigrafía Biomolecular, E.T.S.I.M.E. (UPM), Madrid
ISSN: 0213-683X
Year of publication: 2020
Issue: 67
Pages: 119-122
Type: Article
More publications in: Geogaceta
Abstract
The use of the amino acid racemization technique in geochro-nology offers a great advantage compared to other techniques, as racemization analyses are usually much faster and cheaper. Howe-ver, as in any other technique, amino acid racemization is subject to a number of uncertainties, which have to be thoroughly analysed previously to any interpretation of the data. In this work, we present the results obtained in a group of 25 continental gastropods found in a paleoseismological trench in Alhama de Murcia (Betic Range, Spain). We carry out the comparison of dextrorotatory and levorota-tory configuration (relation D/L) of the aspartic and glutamic acids. First, we review the different sources of uncertainty in the racemiza-tion process. Subsequently we show the methodology followed for discarding samples and, finally, we interpret in preliminary terms the results in relation to the local stratigraphy and paleoseismology.