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XVIII-wieczna rycina Wieliczki : interesujący i rzadki obraz kopalni oraz miasta

Skubisz M., Daszkiewicz P., Tarkowski R.

Przegląd Geologiczny

2014

Vol. 62, nr 7

343--347

An 18th-century drawing has been found in the Institut de France in Paris. This is a valuable iconographic source for both the town of Wieliczka and the mine, originating from the 1860s. Particularly important are the views of buildings and mining objects whose iconographic records are scanty (Church of St. Clement; Church of St. Spirit; Regis, Wodna Góra, Leszno and Dani³owicz pitheads; underground Chapel of St. Anthony) or their appearances were previously unknown (underground Chapel of St. John of Nepomuk), as well as the imagery of techniques of mining, transportation, mine dewatering and mine working protection.

Colourful speleothems in the Wieliczka Salt Mine

Sawłowicz Z., Przybyło J., Boroń K.

Geological Quarterly

2014

Vol. 58, No. 3

449--458

Secondary halite deposits in the Wieliczka Salt Mine are represented by various forms of speleothems. Some of them, e.g. stalactites, cauliflowers or crusts, reveal various hues, yellow to red to brown. These hues are related to iron compounds, but the forms, occurrence and composition of these compounds has not previously been studied. To explain the origin of their colours a detailed study of samples collected in the mine, including brines and water soluble extracts and produced experimentally in the laboratory, has been undertaken using SEM, XRD and AAS. The colourful speleothems are compared, using SEM-EDS, with the forms and composition of rusting metal artefacts, where several iron oxide minerals have been identified. We suggest that coloured halite is generally pure halite of which the surface was covered by a ferric minerals suspension in the brine. Colours of the speleothems stem from the various colours of iron minerals whereas their intensity is related probably to the type of fluid that coated the crystals, a continuous film or finely dispersed micron-size mineral aggregates.