ISSN

print 2570-7337
online 2570-7345

Sulfide mineralization from Skalka near Kraslice (Czech Republic)


Volume 24, issue 2 (2016), pages 278-284

Keywords

Abstract

An interesting hydrothermal sulfide mineralization has been found in the dumps of the Skalka ore occurrence near Kraslice, western Bohemia, Czech Republic. The most abundant jamesonite forms there steel to black grey acicular crystals up to 2 mm in lenght and their irregular aggregates in quartz gangue in association with boulangerite and ullmannite. Jamesonite is monoclinic, space group P21/a and its refined unit-cell parameters are: a 15.709(2), b 19.127(3), c 4.031(1) Å, β 91.78(2)° and V 1210.6(3) Å3. Its empical formula (mean of 12 point analyses) is Pb4.14Fe1.01Sb6.12S13.73. Boulangerite occurs as well-formed acicular crystals up to 200 μm together with earlier jamesonite and Fe-rich sphalerite; in association also Ag-rich tetrahedrite, bournonite and ullmannite were observed. Its chemical composition (mean of 10 point analyses) corresponds to empirical formula Pb5.18Sb4.02S10.79.

Ag-rich tetrahedrite was found as steel black-grey aggregates up to 1 mm in size in association with earlier Fe-rich tetrahedrite and later bournonite. Its empirical formula (mean of 3 point analyses) is (Cu3.02Ag2.98)Σ6.00Cu4.03(Fe1.19Zn0.83)Σ2.02 Sb4.21S12.73. Fe-rich sphalerite forms irregular dark brown to black-brown aggregates up to several mm across in association with boulangerite and Ag-rich tetrahedrite. It shows chemical composition with Fe contents about 0.17 apfu (ca 10 wt. %) with empirical formula (mean of 4 point analyses)  (Zn0.83Fe0.17)Σ1.00S1.00. Bournonite occurs there only rarely as irregular aggregates up to 10 μm across and thin margins of aggregates of Ag-rich tetrahedrite; its empirical formula is Pb1.01Cu0.99Sb1.01S2.99. Rare ullmannite was found as microscopic aggregates up to 20 μm in size in association with jamesonite and boulangerite. Its chemical composition (mean of 4 point analyses) corresponds to empirical formula (Ni0.96Fe0.01)Σ0.97(Sb1.03As0.01)Σ1.04S0.99.

Files

Abstract (PDF) - 195.08KB
Fulltext (PDF) - 1.29MB

References

Beran P. (1997) Mineralogie ložiska Cu (Ag, Au, Co) rud Tisová u Kraslic. Bull. mineral.-petrolog. Odd. Nár. Muz. (Praha) 4-5, 65-77.

Burnham Ch. W. (1962) Lattice constant refinement. Carnegie Inst. Washington Year Book 61, 132-135.

Chrt J., Neumann J., Hoffman V., Trdlička Z. (1972) Měděnokyzové ložisko Tisová u Kraslic. Sbor. geol. Věd, ložisk. Geol. 15, 7-45.

Lienert H. (1988) Polymetalické stratiformní zrudnění mezi Kraslicemi a Mlýnskou. Výběr prací Geoindustria 16, 5-17.

Lienert H. a kolektiv (1986) Kraslicko – surovina Cu rudy, závěrečná zpráva. MS, Geoindustria Praha.

Litochleb J., Sejkora J., Fišera M. (2008) Freibergit a jamesonit z historického ložiska stříbra Šebestěnice u Čáslavi (Česká republika). Bull. mineral.-petrolog. Odd. Nár. Muz. (Praha) 16, 2, 193-196.

Matsushita Y., Ueda Y. (2003) Structure and physical properties of 1D magnetic chalcogenide, jamesonite (FePb4Sb6S14). Inorg. Chem. 42, 7830-7838.

Neumann J. (1968) Závěrečná zpráva Tisová Cu rudy. MS, Geoindustria Stříbro.

Novák J. (1985) Petrograficko-mineralogické rozbory. In: Lienert H. et al. (1986) Kraslicko - surovina Cu rudy. MS, závěrečná zpráva, Geoindustria Praha.

Ondruš P. (1993) ZDS - A computer program for analysis of X-ray powder diffraction patterns. Materials Science Forum, 133-136, 297-300, EPDIC-2. Enchede.

Pouchou J. L., Pichoir F. (1985) “PAP” (φρZ) procedure for improved quantitative microanalysis. In: Microbeam Analysis (J. T. Armstrong, ed.). San Francisco Press, San Francisco, 104-106.

Sejkora J., Kopecký S., Pauliš P., Kopecký S. ml. (2015) Nové poznatky o primární mineralizaci v havlíčkobrodském rudním revíru (Česká republika). Bull. mineral.-petrolog. Odd. Nár. Muz. (Praha) 23, 2, 277-296.

Suček P. (1994) Závěrečná likvidační zpráva za ložisko Cu rud Tisová u Kraslic. MS, Rudné doly Příbram.

Škácha P., Sejkora J., Knížek F., Slepička V., Litochleb J., Jebavá I. (2012) Výskyty unikátního monometalického stříbrného zrudnění na žíle H14F3 mezi 7. a 9. patrem šachty č. 21 Háje, příbramský uran-polymetalický revír (Česká republika). Bull. mineral.-petrolog. Odd. Nár. Muz. (Praha) 20, 2, 230-254.

Urban M. a kolektiv (2014) Horní města Krušných hor, Karlovarský kraj. Fornica publishing, Sokolov, 1-319.

Velebil D., Macek I., Soumar J. (2016) Příspěvek k poznání chemismu tetraedritů z českých lokalit: Příbram, Obecnice, Zvěstov, Mníšek pod Brdy, Ratibořské Hory, Stará Vožice, Jáchymov, Kutná Hora a Stříbrná Skalice. Bull. mineral.-petrolog. Odd. Nár. Muz. (Praha) 24, 1, 132-143.

Yvon K., Jeitschko W., Parthé E. (1977) Lazy Pulverix, a computer program for calculation X-ray and neutron diffraction powder patterns. J. Appl. Cryst. 10, 73-74.