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Mineralogy of medieval slags from lead and silver smelting (Bohutin, Pribram district, Czech Republic) : towards estimation of historical smelting conditions

Abstract : Slags from the Pb/Ag medieval (14th century) smelting plant located at Bohutín, Příbram district, Czech Republic, were studied from the mineralogical and geochemical points of view. Two types of slags were distinguished: (i) quenched slags formed mainly by Pb-rich glass and unmelted residual grains of SiO2 and feldspars, and (ii) crystallized slags mainly composed of Fe-rich olivine (fayalite) and glass. The mean log viscosity value of the slags calculated for 1200°C was 2.119 Pa s. The morphology of olivine crystals was used to estimate the cooling rates of the melt, for some slags indicating rates > 1450°C/h. The projection of the bulk composition of slags onto the SiO2–PbO–FeO ternary system was used for rough temperature estimates of slag formation, lying probably between 800 and 1200°C.
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Soumis le : lundi 13 septembre 2010 - 10:05:27
Dernière modification le : jeudi 4 juin 2020 - 15:50:05

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Vojtěch Ettler, R. Červinka, Zdenek Johan. Mineralogy of medieval slags from lead and silver smelting (Bohutin, Pribram district, Czech Republic) : towards estimation of historical smelting conditions. Archaeometry, Wiley, 2009, 51 (6), p. 987-1007. ⟨10.1111/j.1475-4754.2008.00455.x⟩. ⟨hal-00516919⟩

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