MINERAŁY SREBRA Z KOPALNI FRIEDERIKE JULIANE W CIECHANOWICACH (SUDETY)

Abstract

SILVER MINERALS FROM THE FRIEDERIKE JULIANE MINE AT CIECHANOWICE (SUDETY MTS, POLAND)Abstract. Old dumps of the former Friederike Juliane mine in Ciechanowice (Sudety Mts., Poland) were sampled for analysis of silver minerals. Two types of acantite, native silver, Ag amalgams and stromeyerite were identified. Part of the Ag amalgams corresponds, by their chemical composition, to eugenite of the following empirical formula: Ag11.0  Hg2.05 (based 12 analytical points). This mineral is associated with an amalgam belonging to the Ag6.39  Hg1.00–Ag17.04  Hg1.00 series, and to mercuriferous silver. Silver forms wires, dendrites, inclusions in barite I, and löllingite–safflorite II. Stromeyerite forms thin veinlets cutting the massive bornite chalcocite ore. Sometimes, stromeyerite coexists with silver amalgams and otherAgsulphides and sulphosalts. The silver-rich mineralisation represents low-temperature ore parageneses (formed at about 320–200oC).