Sociedad de Arqueometría Aplicada al Patrimonio Cultural
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Seminar "Recent Advances in the Obsidian Hydration Dating" by Prof. Ioannis Liritzis
Recent Advances in the Obsidian Hydration Dating
Speaker: Ioannis Liritzis (Vicepresident of the European Academy of Sciences & Arts (EASA))
Date: 14 October, 2025 at 12:00 (CET)
Venue: Geosciences Barcelona Conference room & online (GEO3BCN Youtube channel)
Organisers: GEO3BCN-CSIC & Universitat de Barcelona
Cost: No registration fee.
Abstract:
The mechanism of diffused water through the surface of archaeological Obsidian blades, a mainly temperature dependent and concentration-driven phenomenon, related to the obsidian hydration dating (OHD), is a subject of ongoing development regarding limitations and reliability and the interest in OHD is revived recently.
Sixty-six years ago, the dating of obsidian stone tools from the last time they were used by prehistoric people had been proposed, observing that a newly exposed surface of obsidian takes on water from the environment at a known rate that can be used to calculate the time elapsed since exposure.
Obsidian hydration dating (OHD) has been a concern of research into chronological issues of ancient obsidian artifacts. It is based on the power law equation that hydration rim is proportional to the square-root of time relating hydration depth, diffusion rate (k). Employing the Arrhenius plot experimental aged data at high and low temperature were used to estimate the k at environmental hydration temperature (T). As a result a new calibration equation has been produced with satisfactory ages.
A review shall be presented of dating attempts, the limitations and prospect of current directions of the OHD (empirical method, the phenomenological method SIMS-SS, alternative methodologies in calculating the hydration rim).
Watch it online at: https://www.youtube.com/live/0JI5mWWZZ6g
Publicaciones añadidas recientemente a la web
Iron-manganese crystalline phases developed in high lead glazes during firing
2025 Journal of the European Ceramic Society
Crónica del XV Congreso Ibérico de Arqueometría (Aveiro, Portugal)
2025 Al-Madan