Géochimie isotopique du soufre des gîtes plombo-zincifères belges

Sulfide sulfurs from Belgian lead-zinc ore deposits have delta 34S values ranging from -15 to 15per mille. These sulfide sulfurs may derive from the reduction of Devonian and Carboniferous sea-water sulfates. The study of the isotopic fractionation between different cogenetic sulfides reflects a lack of isotopic equilibrium which does not permit to determine temperatures of deposition.-English summarySCOPUS: ar.jinfo:eu-repo/semantics/publishe

Isotope geochemistry (S, C, O, Sr, Pb) of the Chaudfontaine mineralization (Belgium)

Investigations on S, C, O, Sr, and Pb isotopes in ores, gangue, and country rocks of the Chaudfontaine ore deposit confirm that interbedded barite and white sparry calcites are cogenetic. They emphasize the marine origin of S and the nonmarine origin of the metals. They underline the important role played by the bacterial reduction at the site of deposition. Hypotheses concerning the source of the metals and the nature of the brines involved in their transportation are briefly discussed. © 1989 Springer-Verlag.info:eu-repo/semantics/publishe