Jáchymov (St Joachimsthal), Jáchymov District (St Joachimsthal), Krušné Hory Mtns (Erzgebirge), Karlovy Vary Region, Bohemia (Böhmen; Boehmen), Czech Republic
A classic, rich vein-type Ag-Co-Ni-Bi-U deposit. Jachymov is one of the most extensive and best known examples of a class of ore deposit known generally as the five-element type. The name derives from the dominance of Ag-Co-Ni-As-Bi but is somewhat deceptive because it implies simplicity. Actually many ore deposits in this class are considerably more complex beginning with the presence, in a few, of major amounts of uranium oxide. The Jachymov district, along with the Eldorado mine at Port Radium, Canada, are the two best example of the uranium-rich variant of the five-element ore deposit type.
No five-element ore district has received adequate scientific investigation. Jachymov has received more extensive study than most (Ondrus, et. al, Journal of the Czech Geological Society, 48/3-4, 2003). A broader overview of five-element ore deposits is given by Kissin, Geoscience Canada, V. 19, No.3 (1992)
Jáchymov was founded by count Štěpán Šlik in 1516 in the place of former settlement Konradsgrün. The first known prospecting was done in 1510, the first mentioned mine was started in 1512 (mine of three wise men - Tří králů) - its opening still visible behind the house No. 496. The first find of silver was done after striking the Fundgrubner vein.
Abundant silver deposits lead to fast expansion of mining industry and whole town of Jáchymov ("silver rush") - after four years in 1520 - 4 963 inhabitants, in 1533 - 18 000 inhabitants - the second most populated town in Bohemia after Prague (compared to current 3 333 residents in 2010). In 1524 there were 613 mines and shafts operated. The mined silver was minced to famous coins named after the town (Joachimsthal) as Thaler (Talero, Tolar) later giving name to Dollar. Between 1527 and 1531 worked in Jáchymov Georgius Agricola as a town physician. In the time of greatest prosperity of silver mines (1516-1600) app. 350 tons of Ag were mined.
NOTE: A fine collection of Jachymov minerals was assembled in recent decades by Mr. Josef Vajdak of Massapequa, New York. This private collection was disbursed starting in January, 2009.
Mineral ListMineral list contains entries from the region specified including sub-localities
427 entries listed. 335 valid minerals. 40 type localities (valid minerals). 1 type locality (other).
Localities in this Region
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