Survey of Non-ferrous Medieval Workshops by Field-Portable XRF Soil Analysis at Castel-Minier and Agnesserre (Aulus-les-Bains, Ariège)

Difficulties related to non-ferrous metal workshops detection led to test a new way of survey by a real portable x-ray spectrometer. After a calibration phase which yielded very good results for lead, zinc and cooper, three approaches were tried in south-west of France at the site of Castel-Minier, (mining and multi metallurgical site from the second Middle Ages). Thanks to an interdisciplinary work that include geochemistry, archeology, history and geophysic, the results were particularly positive. They led to a better understanding of chronological phases. They give the location of slag processing workshops and classification of geochemical anomalies.