Petrography and geochemistry of the siliceous rocks at Stelida

Stelida Naxos Archaeological Project (SNAP) has a new paper out in the Journal of Archaeological Science:

‘Petrography and geochemistry of the siliceous rocks at Stélida, a chert source and early prehistoric stone tool manufacturing site on northwest Naxos, Greece’
Journal of Archaeological Science: Reports 12: 819-833

Skarpelis, N., Carter, T., Contreras, D.A., and Mihailović, D.D. (2017)

This article presents the results of a combined petrographic and geochemical characterization study of raw materials from the early prehistoric chert source of Stelida, on Naxos (Cyclades, Greece). The project represents the first step in a larger provenience studies programme dedicated to documenting which communities exploited this source during the Lower Palaeolithic to Mesolithic (≥ 250,000–9000 BP). Field- and lab-based studies conclude that the cherts originated by pervasive silicification of the upper part of a clastic sedimentary sequence by hydrothermal fluids moving along a detachment fault separating them from the underlying Naxos granodioritic intrusive. Quartz is the dominant mineral, while zircon, anatase, hematite and barite are accessories. Petrographic features that are considered characteristic of the Stelida raw materials (e.g. colour and lustre, massive microcrystalline texture, abundant cavities, quartz crystals projecting into cavities and thin quartz veinlets crosscutting bedding planes) are described. The cherts are strongly depleted in trace and Rare Earth elements. The petrographic and geochemical study of any stone tool made of chert showing similar macro- and microtextures, mineralogical features, and geochemical signature indicates a potential Stélida origin.