Obří důl
Two major (Helena and Gustav) and several minor (Václav etc.) contact skarn bodies developed at the contact of mantle rocks with granite of Krkonoše-Jizerský Pluton. Ore minerals are mostly pyrrhotite and sphalerite. In some minerals (garnets, epidote) isomorphic admixture of tin is known. With later tectonic activity are connected quartz veins with rock crystal, fluorite, scheelite, albite and pumpellyite.
References
Pauliš, P., Janák, P., Macháček, V.: Ryzí měď z dolu Kovárna v Obřím dole v Krkonoších. Bulletin mineralogicko-petrografického oddělení Národního muzea v Praze, 2008, vol. 16, 2, 244.
Šrein, V.: Malayait z Obřího dolu – první nález v ČSSR. Časopis pro mineralogii a geologii, 1985, roč. 30, č. 3, s. 330.
Mineral List
33 entries listed. 32 valid minerals.
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