Delos Archaeological Marbles: A Preliminary Geochemistry-Based Quarry Provenance Study

This paper presents for the first time chemical data on the ancient (Antiquity period) marble quarries of Delos Island and some architectural marbles from its famous and exceptionally well-preserved archaeological site. Delos geological substratum is mostly composed of granite, including very few decametric marble enclaves. However, ancient Delian architecture is dominated by gneiss and marbles. A large quantity of marble had thus to be imported from neighbouring Cycladic Islands and continental Greece. Their provenances remain mostly unknown. Several analytical methods have been developed in archaeometry for years to determine the origin of marbles, but they are generally destructive. This paper reports a methodology based on a hand-held portable X-ray fluorescence (pXRF) analyser to detect major and trace elements often used in provenance studies. Drawbacks of using those elements for marble provenance and analytical limitations attached to portable instruments were frequently discussed. Here the usefulness of pXRF for marble provenance research was tested in association with principal component analysis (PCA). Two artefacts of presumed Delian origin were selected and the results showed that one of them came undoubtedly from a Delian quarry while the other one was not of local origin. This protocol appeared to be a powerful tool when conventional destructive analyses are precluded.