Geodynamic setting for mineralization at Laisvall bearing “petroleum-associated lead” and “basement-derived lead”. (a) Genetic model and palaeotectonic setting during mineralization in the Middle Ordovician at Laisvall. (b) Mineralizing processes and details of the two lead sources with emphasis on the low-radiogenic lead source supplied by petroleum and petroleum-associated brines. Petroleum also contributed H2S for mineralization via thermochemical sulphate reduction (modified after ref.16). Figure 2 is modified after a published figure with permission from “Springer Nature: Mineralium Deposita, vol. 51, A refined genetic model for the Laisvall and Vassbo Mississippi Valley-type sandstone-hosted deposits, Sweden: constraints from paragenetic studies, organic geochemistry, and S, C, N, and Sr isotope data, Saintilan, N.J., Spangenberg, J.E., Samankassou, E., Kouzmanov, K., Chiaradia, M., Stephens, M.B., and Fontboté, L., p. 639–664, Copyright, 2016”.