Abstract
After a brief review of karst weathering processes, the main rock units formed by intra-karstic sedimentation are considered, i.e. detrital and chemical deposits. The behaviour of base metals in traces is then studied in the evolution of the physic-chemical properties of groundwater during its down-trickling course to the water table. Attention is drawn to the trapping effect of the imbibition zone.
Finally, the evolution of both the sulfide deposits and the connate waters during karst fossilisation and further burial is discussed. In particular, the sphalerite-galena-barite association is investigated in order to explain the reasons for the peculiar chemical composition of sulfide fluid inclusions which occur in the so-called “below-unconformity” lead and zinc deposits in carbonate environments.
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Bernard, A.J. (1973). Metallogenic Processes of Intra-karstic Sedimentation. In: Amstutz, G.C., Bernard, A.J. (eds) Ores in Sediments. International Union of Geological Sciences, vol 3. Springer, Berlin, Heidelberg. https://doi.org/10.1007/978-3-642-65329-2_4
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DOI: https://doi.org/10.1007/978-3-642-65329-2_4
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