Marrucciite, a rare Hg-sulfosalt from the Gelnica ore deposit (Slovak Republic), and its comparison with the type occurrence at Buca della Vena mine (Italy)

Sejkora, Jiří; Ozdín, Daniel; Laufek, František; Plášil, Jakub; Litochleb, Jiri

doi:10.3190/jgeosci.107

Cited by 9 publications

(20 citation statements)

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“…It might be caused by the acicular shape of hodrušite crystals. Similar situation was also described for another fibrous sulphosaltmarrucciite (Sejkora et al 2011). The refined unit-cell parameters (Tab.…”

Section: Minerals Of the Cuprobismutite Homologous Series (Hodrušitesupporting

confidence: 80%

Unusual morphological forms of hodrušite from the Rozália vein, Hodruša-Hámre near Banská Štiavnica (Slovak Republic)

Sejkora¹,

Števko²,

Ozdín³

et al. 2015

J. Geosci.

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Rare Cu-Bi sulphosalt, hodrušite, occurs in the Rozália vein (levels X-XIV of the Rozália mine, Hodruša-Hámre ore deposit near Banská Štiavnica, central Slovakia) in two unusual morphological forms. The first type are brownish bronze thin acicular striated crystals, up to 3 mm long, in drusy cavities of quartz-hematite gangue, which are usually grouped into chaotic or irregular aggregates. The second hodrušite type comprises flattened columnar aggregates, up to 1.5 cm long, overgrown by hematite in quartz gangue. These aggregates are distinctly striated with brownish bronze colour and metallic lustre. Abundant W-and Al-rich hematite, chalcopyrite, kaolinite/dickite, siderite, baryte, rare bismuthinite and kupčíkite were found in the association. The earliest columnar aggregates of hodrušite are locally substantially replaced by bismuthinite; these hodrušite-bismuthinite aggregates are further intensively pushed back by hematite displaying W-and Al-rich zones. Acicular crystals of hodrušite in gangue cavities were later than bismuthinite and hematite and their formation was related to remobilisation of Cu and Bi from earlier altered gangue. Powder X-ray diffraction data and chemical composition of both hodrušite types are similar; their unit-cell parameters were refined (monoclinic space group C2/m) as: a 17.552(5), b 3.905(1), c 27.167(9) Å, β 92.44 (3) o , V 1860.5(9) Å 3 (acicular crystals) and a 17.567(2), b 3.9151 (7), c 27.155(5) Å, β 92.43 (1) o , V 1865.9(4) Å 3 (columnar aggregates). Cu-for-Bi substitution is characteristic of both hodrušite types; it influences calculated N chem values (0.98-1.33) to the point that it is impossible to distinguish hodrušite (ideal 1.5) from kupčíkite (ideal 1.0). The problem is resolved by Fe and Ag contents: kupčíkite has more than 2 at. % Fe, cuprobismutite contains more than 2 at. % of Ag; hodrušite usually has Ag and Fe contents below 2 at. %. Hematite is remarkable for its high WO 3 content reaching 4.96 wt. % (0.04 apfu), extremely unusual of a hematite from hydrothermal vein mineralization. Tungsten probably enters the hematite structure via the 2Fe 3+ ↔W 6+ +□ substitution.

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Section: Minerals Of the Cuprobismutite Homologous Series (Hodrušitesupporting

confidence: 80%

Unusual morphological forms of hodrušite from the Rozália vein, Hodruša-Hámre near Banská Štiavnica (Slovak Republic)

Sejkora¹,

Števko²,

Ozdín³

et al. 2015

J. Geosci.

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“…It might be caused by the acicular shape of grumiplucite crystals (Toraya and Marumo 1981). Similar situation was also described for other fibrous sulfosalts -marrucciite (Sejkora et al 2011), hodrušite or antimonselite (Škácha et al 2015). The refined unit-cell parameters of both types of grumiplucite from Rudňany (Tab.…”

Section: Grumiplucitementioning

confidence: 63%

Grumiplucite from the Rudňany deposit, Slovakia: a second world-occurrence and new data

Števko¹,

Sejkora²,

Peterec³

2015

J. Geosci.

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Grumiplucite, ideally HgBi 2 S 4 was identified at the Droždiak vein, Rudňany deposit (Spišsko-gemerské Rudohorie Mts., Slovakia). This rare Hg-sulfosalt forms metallic lead-grey to steel-grey, prismatic to acicular crystals up to 1 cm long, often grouped into irregular aggregates. It occurs in cavities of siderite with abundant cinnabar, Hg-rich tetrahedrite and chalcopyrite aggregates. Minor quartz or barite crystals and microscopic aggregates of Sb-rich bismuthinite to Birich antimonite were also observed. On the basis of chemical analyses, two types of grumiplucite were distinguished at the Rudňany deposit. The first is close to an ideal composition and has empirical formula Hg 0.99 Bi 1.94 S 4.08 (based on 7 apfu). The second is characterized by regularly elevated contents of Sb ranging from 0.02 to 0.77 apfu. Grumiplucite is monoclinic, space group C2/m, with unit-cell parameters refined from X-ray powder data: a = 14.172(2), b = 4.0525 (7), c = 13.975(1) Å, β = 118.257 (8) o and V = 707.0(2) Å 3 (Sb-free) and a = 14.183(1), b = 4.0538(5), c = 13.980(1) Å, β = 118.239 (1) o and V = 708.1(2) Å 3 (Sb-rich). Raman spectra for grumiplucite crystals with variable Sb contents are mutually well comparable. Therefore it seems that different Sb occupation does not affect the energy and intensity of Raman bands and they significantly differ from spectra of particularly structure-related mineral livingstonite, HgSb 4 S 8 . The dominant feature in the Raman spectra of grumiplucite is a series of spectral bands that corresponds to the stretching and bending vibrations of BiS 5 polyhedra and Hg-S bonds. Received: 23 July, 2015; accepted: 1 December, 2015; handling editor: F. Laufek 2013). This paper is focused on detailed mineralogical characterization of grumiplucite and associated minerals from the Rudňany deposit, Spišsko-gemerské Rudohorie Mts., Slovakia, which is a second world occurrence of this Hg-sulfosalt. We present here new wavelength-dispersive electron probe microanalyses, X-ray powder diffraction and Raman data for this very rare mineral phase. Keywords: grumiplucite, sulfosalts, X-ray powder data, chemical composition, Raman spectroscopy, Rudňany deposit Geological settingThe Rudňany deposit (or Rudňany ore field) is located c. 11 km SE of Spišská Nová Ves town in the northern part of Gemeric Superunit, Spišsko-gemerské Rudohorie Mts., Slovakia (Fig. 2); GPS coordinates of the Západ shaft are: 48°52'47.79"N and 20°39'29.98"E. It was one of the most important mining centers as well as the largest siderite-type (Fe-Ba-Cu-Hg) deposits in Slovakia, mined already in prehistoric times. Most of the mining activity ceased there in 1993; only minor mining of barite still continues at the Poráč shaft area to the present day.Hydrothermal siderite-quartz ± barite veins, sometimes with abundant sulfidic mineralization, strike W-E

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“…Other Bi sulphosalts like cosalite (Bernard 1964, Háber 1980), galenobismutite (Antal 1991, Pršek 2008, jaskólskiite (Pršek, Biroň 2007), nuffieldite (Pršek et al 2006) or wittichenite (Háber 1978;Kozub et al 2011) are rare. Chalcostibite is infrequent too (Sejkora et al 2011;Mikuš et al 2018). Unusual assemblage of Ag-Bi sulphosalts (matildite, gustavite and benjaminite) was recently described from Kobaltová vein near Medzev by Mikuš et al (2019).…”

Section: Introductionmentioning

confidence: 99%

“…The most common Pb sulphosalts at the siderite-type veins are bournonite, jamesonite and boulangerite (e.g. Zimányi 1914;Novák 1962;Trdlička 1967;Kupčík et al 1969;Háber 1980;Miškovic 1990;Pršek, Biroň 2007;Pršek, Peterec 2008;Sejkora et al 2011;Mikuš et al 2018Mikuš et al , 2019 man 1994) or zinkenite and scainiite (Sejkora et al 2011) are scarce. Rare Hg sulphosalts, marruccite (Sejkora et al 2011) and grumiplucite (Števko et al 2015) were also recently identified.…”

Section: Introductionmentioning

confidence: 99%

New data on sulphosalts from hydrothermal siderite-type veins in the Spišsko-gemerské rudohorie Mts. (eastern Slovakia): 1. Nuffieldite and aikinite from Slovinky-Došťavná vein

Števko¹,

Sejkora²,

Dojčanský³

2021

Bull Mineral Petrolog

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A new occurrence of nuffieldite was recently discovered in a siderite-type hydrothermal vein with sulphides in Došťavná near Slovinky, Spišsko-gemerské rudohorie Mts., Spišská Nová Ves Co., Košice Region, Slovakia. It forms lead-gray acicular crystals reaching up to 1 cm in size or aggregates up to 2.5 cm, which are enclosed in quartz-siderite matrix together with chalcopyrite, pyrite, tourmaline and chlorite. Nuffieldite is frequently replaced by minor aikinite, galena and native bismuth. The refined unit-cell parameters of nuffieldite (for the orthorhombic space group Pbnm) are: a 14.5313(16) Å, b 21.454(2) Å, c 4.0500(6) Å and V 1262.58(19) Å3. The average (n=145 analyses) empirical formula of nuffieldite from Slovinky-Došťavná based on Pb+Bi+Sb = 5 apfu is corresponding to Cu1.30Pb2.00Bi2.00(Pb0.30Bi0.30 Sb0.40)1.00(S7.12Se0.03)7.15. Aikinite forms microscopic, anhedral to subhedral grains or aggregates replacing nuffieldite. The average (n=29) empirical formula of studied aikinite based on (Cu+Pb)/2+(Sb+Bi) = 8 apfu is Pb3.83Cu3.76(Bi4.12 Sb0.09)4.21(S12.40Se0.03)12.03.

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Marrucciite, a rare Hg-sulfosalt from the Gelnica ore deposit (Slovak Republic), and its comparison with the type occurrence at Buca della Vena mine (Italy)

Cited by 9 publications

References 3 publications

Unusual morphological forms of hodrušite from the Rozália vein, Hodruša-Hámre near Banská Štiavnica (Slovak Republic)

Unusual morphological forms of hodrušite from the Rozália vein, Hodruša-Hámre near Banská Štiavnica (Slovak Republic)

Grumiplucite from the Rudňany deposit, Slovakia: a second world-occurrence and new data

New data on sulphosalts from hydrothermal siderite-type veins in the Spišsko-gemerské rudohorie Mts. (eastern Slovakia): 1. Nuffieldite and aikinite from Slovinky-Došťavná vein

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