2009/01/21 by V. ETTLER, Vojtěch Ettler, R. ČERVINKA +3 · 1 citation
Earth and Planetary Sciences · Engineering · Computer Science · #Geological and Geochemical Analysis #Metallurgical Processes and Thermodynamics #Geochemistry and Geologic Mapping
paper · doi:10.1111/j.1475-4754.2008.00455.x
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 SiO 2 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 SiO 2 –PbO–FeO ternary system was used for rough temperature estimates of slag formation, lying probably between 800 and 1200°C.