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Micro-contextual identification of archaeological lipid biomarkers using resin-impregnated sediment slabs

Abstract: Characterizing organic matter preserved in archaeological sediment is crucial to behavioral and paleoenvironmental investigations. This task becomes particularly challenging when considering microstratigraphic complexity. Most of the current analytical methods rely on loose sediment samples lacking spatial and temporal resolution at a microstratigraphic scale, adding uncertainty to the results. Here, we explore the potential of targeted molecular and isotopic biomarker analysis on polyester resin-impregnated sediment slabs from archaeological micromorphology, a technique that provides microstratigraphic control. We performed gas chromatography-mass spectrometry (GC-MS) and gas chromatography-isotope ratio mass spectromety (GC-IRMS) analyses on a set of samples including drill dust from resin-impregnated experimental and archaeological samples, loose samples from the same locations and resin control samples to assess the degree of interference of polyester resin in the GC-MS and Carbon-IRMS signals of different lipid fractions (n-alkanes, aromatics, n-ketones, alcohols, fatty acids and other high polarity lipids). The results show that biomarkers within the n-alkane, aromatic, n-ketone, and alcohol fractions can be identified. Further work is needed to expand the range of identifiable lipid biomarkers. This study represents the first micro-contextual approach to archaeological lipid biomarkers and contributes to the advance of archaeological science by adding a new method to obtain behavioral or paleoenvironmental proxies.

Otras publicaciones de la misma revista o congreso con autores/as de la Universidad de Cantabria

 Autoría: Rodríguez de Vera C., Herrera-Herrera A.V., Jambrina-Enríquez M., Sossa-Ríos S., González-Urquijo J., Lazuen T., Vanlandeghem M., Alix C., Monnier G., Pajovic G., Tostevin G., Mallol C.,

 Fuente: Scientific Reports, 10 (2020), 20574

 Fecha de publicación: 25/11/2020

Nº de páginas: 14

Tipo de publicación: Artículo de Revista

 DOI: 10.1038/s41598-020-77257-x

ISSN: 2045-2322

Proyecto español: PID2019-107113RB-I00

Url de la publicación: https://doi.org/10.1038/s41598-020-77257-x

Autores/as

RODRÍGUEZ DE VERA, CATERINA

HERRERA HERRERA, ANTONIO V.

JAMBRINA ENRÍQUEZ, MARGARITA

SOSSA RÍOS, SANTIAGO

TALIA LAZUEN FERNANDEZ

VANLANDEGHEM, MARINE

ALIX, CLAIRE

MONNIER, GILLIANE

PAJOVIC, GORAN

TOSTEVIN, GILBERT

MALLOL, CAROLINA