Bulletin Mineralogie Petrologie

Ozdín Daniel, Uher Pavel, Koděra Peter

Volume 21, issue 2 (2013), pages 234-239

cobaltpentlandite, skarn-porphyry deposit, Vysoká-Zlatno, Štiavnické vrchy Mts., Slovakia, electron microprobe data

In this paper we describe the first occurrence of cobaltpentlandite in Slovak Republic. Cobaltpentlandite was found in borehole the R-1 in depth 677 m in Ca-Mg skarn at the Cu-Au skarn-porphyry deposit Vysoká-Zlatno. One grain of cobaltpentlandite forms euhedral crystal up to 0.014 mm in size and it is chemically homogenous. It occurs in assemblage with pyrrhotite, magnetite, monticellite, calcite, anhydrite, minerals of ellestadite and garnet group (andradite, kerimasite), anhydrite, perovskite and valleriite. Average of seven precise microprobe analyses gave crystallochemical formula (Co_5.71Fe_1.77Ni_1.62Cu_0.01)_9.11S_7.89. Cobaltpentladite contains up to 13.02 wt. % Fe, 12.65 wt. % Ni and 0.16 wt. % Cu. Its chemical composition is characteristic by dominantly positive correlation of Fe and Ni and by negative correlation (Fe,Ni)Co_-1. Presence of opposite correlation is questionable. Origin of cobaltpentladite is related to adjacent Fe-dominant phases, pyrrhotite and magnetite, which formed in Ca-Mg skarn during younger hydrothermal sulphide stage together with galena and sphalerite.

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Bernard J. H., Rost R. (eds.) 1992 Encyklopedický přehled minerálů. 1-704, Academia, Praha.

Borodaev Yu. S., Bryzgalov I. A., Mozgova N. N., Uspenskaya T. Yu. (2007) Pentlandite and Co-enriched pentlandite as characteristic minerals of modern hydrothermal sulfide mounds hosted by serpentinized ultramafic rocks (Mid-Atlantic Ridge). Moscow Univ. Geol. Bull. 62, 85-97.

Burian J., Smolka J. (1982) Geologická stavba meďnato-porfýrového ložiska Zlatno. Miner. Slov. 14, 517-538.

Burian J., Smolka J., Januš J., Valko P. (1980) Záverečná správa a výpočet zásob - Zlatno, VP. MS, Archív ŠGÚDŠ, Bratislava.

Cook N. J., Ciobanu C. L. (2001) Paragenesis of Cu-Fe ores from Ocna de Fier-Dognecea (Romania), typifying fluid plume mineralization in a proximal skarn setting. Mineral. Mag. 65, 351-372.

Craig J. R., Vaughan D. J., Higgins J. B. (1979) Phase relations in the Cu-Co-S system and mineral associations of the carrollite (CuCo₂S₄)-linnaeite (Co₃S₄) series. Econ. Geol. 74, 657-671.

Dobbe R. T. M. (1991) Tellurides, selenides and associated minerals in the Tunaberg copper deposits, SE Bergslagen, Central Sweden. Mineral. Petrol. 44, 89-106.

Ďuďa R., Ozdín D. (2012) Minerály Slovenska. 1-480, Granit, Praha.

Harris D. C., Nickel E. H. (1972) Pentlandite composition and associations in some mineral deposits. Can. Mineral. 11, 861-878.

Kaneda H., Takenouchi S., Shoji T. (1986) Stability of pentlandite in the Fe-Ni-Co-S system. Mineral. Deposita 21, 169-180.

Kitakaze A., Sugaki A. (2004) The phase relations between Fe_4.5Ni_4.5S₈ and Co₉S₈ in the system Fe-Ni-Co-S at temperatures from 400° to 1100 °C. Can. Mineral. 42, 17-42.

Knop O., Ibrahim M. A. (1961) Chalkogenides of the transition elements. II. Existence of the π phase in the the M₉S₈ section of the system Fe-Co-Ni-S. Can. J. Chem. 39, 297-317.

Koděra M., Andrusovová-Vlčeková G., Belešová O., Briatková D., Dávidová Š., Fejdiová V., Hurai V., Chovan M., Nelišerová E., Ženiš P. (1986 - 1990) Topografická mineralógia Slovenska 1-3. 1-1592, Veda, Bratislava.

Koděra P., Lexa, J., Fallick A. E. (2010) Formation of the Vysoká-Zlatno Cu-Au skarn-porphyry deposit, Slovakia. Mineral. Deposita. 45, 817-843.

Koděra P., Uher P., Ozdín D., Kollárová V., Lexa J. (2009) Monticellit, clintonit a hydroxylellestadit-fluorellestadit: vzácne skarnové minerály na Cu-Au porfýrovo-skarnovom ložisku Vysoká - Zlatno (štiavnický stratovulkán). Miner. Slov. 41, 169-178.

Kojonen K. (1976) Experiments on synthetic pentlandite. In: Ore Mineral Systems. Neu. Jb. Mineral., Abh. 126, 133-135.

Kouvo O., Huhma M., Vuorelainen Y. (1959) A natural cobalt analogue of pentlandite. Am. Mineral. 44, 897-900.

Kúšik R. (1992) Mineralógia a genéza Cu-porfýrového ložiska Zlatno v Štiavnických vrchoch. Miner. Slov. 24, 69-82.

Lexa J., Štohl J., Konečný V. (1999) Banská Štiavnica ore district: Relationship among metallogenetic processes and geological evolution of the central volcanic zone. Mineral. Deposita. 34, 639-654.

Lindahl I. (1973) Cobalt pentlandite from Kongsfjell, Nordland and Birtavarre, Northern Troms. Norges Geol. Unders. 294, 9-19.

Marsina K., Lexa J., Konečný V., Žáková E., Hojstričová V., Konečný P., Káčer Š., Orlický O. (1993) Geochemický model Cu-porfýrových zrudnení v centrálnej zóne štiavnického stratovulkánu. MS, Archív ŠGÚDŠ, Bratislava.

Merkle R. K. W., von Gruenewaldt G. (1986) Compositional variations of Co-rich pentlandite: relation to the evolution of the upper zone of the western Bushveld Complex, South Africa. Can. Mineral. 24, 529-546.

Mozgova N. N., Krasnov S. G., Batuyev B. N., Borodaev Y. S., Efimov A. V., Markov V. F., Stepanova T. V. (1996) The first report of cobalt pentlandite from a Mid-Atlantic Ridge hydrothermal deposit. Can. Mineral. 34, 23-28.

Nysten P. (1986) Textural relations of betechtinite and cobalt pentlandite from Långban, Sweden. Geol. Fören. Stockholms Förh. 108, 135-138.

Petruk, W., Harris, D. C, Steward J. M. (1969) Langisite, a new mineral and the rare minerals cobalt pentlandite, siegenite, parkerite and bravoite from the Langis Mine, Cobalt-Gowganda area, Ontario. Can. Mineral. 9, 597-616.

Ralph J., Chau I. (1993 - 2013) Mindat.org. Prístup 22. Októbra 2013 na adrese http://www.mindat.org/min-1097.html

Riley J. E. (1977) The pentlandite group (Fe,Ni,Co)₉S₈: New data and an appraisal of structure-composition relationships. Mineral. Mag. 41, 345-349.

Rozložník L., Zábranský F. (1971) O výskyte žilníkovo-impregnačného zrudnenia medzi obcami Banská Hodruša, Vysoká a Uhliská. Miner. Slov. 10, 85-94.

Udubaşa G., Hârtopanu P., Hârtopanu I., Gheucă I., Dinică I. (1988) The metamorphosed copper-nickel mineralizations from Vâlsan Valley, Făgăraş Mts. Dări Seamă, Inst. Geol. Geofiz., 72-73, 283-312.

Uher P., Koděra P., Ozdín D. (2012) Kerimasit Ca₃Zr₂(Fe³⁺₂Si)O₁₂ - vzácny granát z Ca-Mg skarnovo-porfýrového ložiska Vysoká-Zlatno, štiavnický stratovulkán (stredné Slovensko). Bull. mineral.-petrolog. Odd. Nár. Muz. (Praha) 20, 1, 59-62.

Uher P., Koděra P., Vaculovič T. (2011) Perovskite from Ca-Mg skarn-porphyry deposit Vysoká-Zlatno, Štiavnica stratovolcano, Slovakia. Miner. Slov. 43, 247-254.

Zábranský F. (1976) Žilníkovo-impregnačné zrudnenie Cu - lokalita Zlatno. MS, Habilitačná práca. Archív Katedry geológie a mineralógie, TU Košice.