Hg-bohaté stříbro a doprovodná mineralizace z Kostelních Střimelic u Stříbrné Skalice (Česká republika)

An interesting occurrence of Hg-rich silver was found in samples from the shaft Jan at the northern margin of the Kostelní Střimelice village (ore district Stříbrná Skalice), central Bohemia (Czech Republic). The mercury-rich silver forms strips up to 2.5 mm in size, tiny veinlets and irregular to lobe-like aggregates in sulfide (tetrahedrite-(Fe), tetrahedrite-(Zn), chalcopyrite) - quartz - calcite veins with thickness up to 5 cm in Permian sediments (arkose). The observed Hg contents in silver range from 0.2 to 12.9 at. % (0.29 - 22.17 wt. %). The detailed description and quantitative chemical data for individual mineral phases are given. The succession of crystallization is as follows: tetrahedrite I (tetrahedrite-(Fe) with minor tetrahedrite-(Zn)) → chalcopyrite → tetrahedrite II (tetrahedrite-(Zn) with minor tetrahedrite-(Fe)) → Hg-rich silver.