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On the petrography, mineralogy and fluid inclusion composition of early speleothem generation from the Koněprusy Cave and some localities nearby
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We document that the early generations of carbonate cave sinters of the Bohemian Karst contain layers of bizarre calcite crystals (gothic-arch and feathery-like calcite), calcite pseudomorphs after aragonite (square-ended crystals and needle botryoids), and siliceous cores of the speleothems. These features may collectively indicate sinter deposition from hot and/or warm waters in a way similar to present-day hot spring travertine or geyserite. Fluid inclusions entrapped in both carbonate and siliceous layers reveal that the crystallization of the sinters occurred from low salinity (< 3 wt. % NaCl equiv.) solutions in the environment where the sinter surface was intermittently wet and dry.References
