Latitude: 46°30'43"N
Longitude: 14°51'25"E
Original name: Revir Union, Mežica, Slovenija
The mining district Union received its name after the Union fault system, where the highest density of ore-bodies in the Mežica Mine was discovered in the early 20th Century. The Union district spans from 5th (602 m) down to 19th (268 m) Level. The main mineral interesting for collectors is wulfenite, which abundantly crystallized after ore minerals in vugs and cavities in tectonically shattered limestone. Typical for Union are yellow tabular crystals of wulfenite with translucent orange core. They occur on limestone matrix, or more commonly as loose clusters of intergrown crystals. Wulfenites found in cavities of corroded galena show bipyramidal forms. Only at the deepest levels of the mine transparent form-rich yellow wulfenite crystals occurred. One of the major finds in Union was 15 metres long pocket of wulfenite discovered at the 12th Level by miner Jože Jehart from Črna na Koroškem in 1989. It produced over 10 tons of fine wulfenite specimens. Today most of the mine above the water level at 417 m are still accessible for mineral collecting.
References
• Aleksander Rečnik (2010)
Minerals of the lead and zinc ore deposit Mežica. Bode Vlg. & Jožef Stefan Institute. Ljubljana: 112 pp.
• Aleksander Rečnik, Igor Dolinar, Uroš Herlec, Ivo Štrucl, Suzana Fajmut Štrucl (2009)
Weltfundstellen: Die Blei- und Zinkerz-Lagerstätte Mežica in Slowenien. Mineralien Welt 20/6: 40-83.
• Peter Bancroft, Mirjan Žorž, Franc Krivograd, Gregor Kobler (1991)
The Mežica Mine, Slovenia, Yugoslavia. Mineralogical Record 22: 97-104.
External Links
http://webbooks.ijs.si a full on-line access to the book:
Minerals of the lead and zinc ore deposit Mežica written by A. Rečnik (2010).
Mineral List
8 entries listed. 7 valid minerals.
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