Bismutové minerály v křemenném valounu se zlatem z náplavů Otavy u Annína (Šumava)

Pages 33-35
Citation LITOCHLEB, Jiří a ŠREIN, Vladimír. Bismutové minerály v křemenném valounu se zlatem z náplavů Otavy u Annína (Šumava). Bulletin mineralogicko-petrologického oddělení Národního muzea v Praze. Prague: National Museum, 2008, 16(1), 33-35. ISSN 1211-0329 (print), 1804-6495 (online). Also available from: https://publikace.nm.cz/en/periodicals/bmpholnrhmvp/16-1/bismutove-mineraly-v-kremennem-valounu-se-zlatem-z-naplavu-otavy-u-annina-sumava
Bulletin mineralogicko-petrologického oddělení Národního muzea v Praze | 2008/16/1

Gold of high purity (98.6 %), found in quartz pebble from alluvial placers of Otava river near Annín, north of Rejštejn at the Šumava Mountains (Czech Republic), is associated with both native bismuth and joséite A with empirical formula (Bi3.92Au0.03Ag0.04)Σ3.99(Te0.97S2.04)Σ3.01. Joséite A is supposed to crystalize from reduced fluids with higher sulphur fugacityand at a relatively high temperature about 266° C. Native bismuth as well as joséite A are mostly altered into supergenic Bi and Bi-Te oxidic phases with variable chemical composition.

Full Text of the Article

Full Text of the Article

Share on Social Networks




Rozumím