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Title: Sourcing sedimentary cherts with archaeological use through the combination of chromatographic and spectroscopic techniques
Authors: Olivares, Maitane
Irazola, Mireia
Murelaga, Xabier
Baceta, Juan Ignacio
Tarriño Vinagre, Antonio
Castro, Kepa
Etxebarria Loizate, Nestor
Issue Date: Jun-2013
Publisher: Elsevier
Citation: Applied Geochemistry, 2013, 33, 252-259
Abstract: The nature and distribution of organic matter in geological cherts of archaeological use can serve to estimate the sources and origins of some remains of lithic industry. For example, organic and biomarker analysis can provide information to allow a deeper insight into source catchment areas, artefact displacement or the way in which the artefacts were employed. In this work, soluble (bitumen) and insoluble (kerogen) organic matter were isolated from several chert samples with different depositional history and analysed by means of gas chromatography–mass spectrometry (GC–MS) and spectroscopic techniques such as infrared and Raman spectroscopy. Chemometric treatment of the results allowed observation of differences between organic matter content on the basis of the depositional setting of the cherts. Samples with a continental deposition seemed to preserve more organic matter with little alteration. The hydrocarbon profiles of these samples were dominated by high molecular weight n-alkanes, alkylcyclohexanes and isoprenoid groups which allowed distinguishing them from the rest of the analysed samples.
ISSN: 0883-2927
DOI: 10.1016/j.apgeochem.2013.02.020
Type: Article
Appears in Collections:Geocronología y Geología

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