The Krásno Sn-W ore district near Horní Slavkov: Mining history, geological and mineralogical characteristics

Beran,; Sejkora, Jiří

doi:10.3190/jcgs.987

Cited by 15 publications

(16 citation statements)

References 6 publications

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“…The information on economic geology and mineralogy of the Krásno area was published by Beran (1995, Beran et al 1999, 2006 and Sejkora et al (2006). Altogether there were known about 165 mineral species up to 1995, including 70 supergene minerals.…”

Section: Previous Workmentioning

confidence: 99%

The nature and genesis of greisen stocks at Krásno, Slavkovský les area - Western Bohemia, Czech Republic

Jarchovsky¹

2012

J. Geosci.

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Section: Previous Workmentioning

confidence: 99%

The nature and genesis of greisen stocks at Krásno, Slavkovský les area - Western Bohemia, Czech Republic

Jarchovsky¹

2012

J. Geosci.

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“…At this open pit, the apical quartz and greisen part of a cupola of autometamorphosed Li-mica -topaz granite was mined for Sn and W ores during the years 1973-1976and 1984-1987(Beran & Sejkora 2006, Sejkora et al 2006a). Here, slavkovite was found near a weathered vein carrying tennantite and cuprite in its center.…”

Section: Occurrencementioning

confidence: 99%

SLAVKOVITE, Cu13(AsO4)6(AsO3OH)4{middle dot}23H2O, A NEW MINERAL SPECIES FROM HORNI SLAVKOV AND JACHYMOV, CZECH REPUBLIC: DESCRIPTION AND CRYSTAL-STRUCTURE DETERMINATION

Sejkora

Plášil

Ondruš³

et al. 2010

The Canadian Mineralogist

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Slavkovite, Cu 13 (AsO 4 ) 6 (AsO 3 OH) 4 •23H 2 O, is a newly discovered supergene mineral from the Geschieber vein, Svornost mine at the Jáchymov (St. Joachimsthal) ore district, Czech Republic, commonly associated with lavendulan, geminite, lindackerite and ondrušite. It forms coatings of pale green rosettes up to 1 mm across or individual spherical aggregates up to 5 mm across. Individual acicular to lath-like crystals are up to 1 mm long and 0.05 mm thick, and are colorless with a greenish tint. Slavkovite is pale green, translucent (aggregates) to colorless with a greenish tint, transparent (crystals). It has a white streak and a vitreous luster, and does not fluoresce under both short-and long-wave ultraviolet light. The cleavage on {011} is perfect, and on {010}, it is good. The Mohs hardness is ~3.5-4; slavkovite is very brittle, with an irregular fracture. Its measured density, 3.05(1) g/cm 3 , is identical to the calculated one. Slavkovite is biaxial positive; the indices of refraction are a' 1.591(2), b' 1.620(2), g' 1.701(2), and the 2V (calc.) is approximately 64°. It is moderately pleochroic (X light gray to colorless, Y very light greenish gray, Z light green). Slavkovite is triclinic, space group P1, a 6.408 (3), b 14.491(5), c 16.505(8) Å, a 102.87(3), b 101.32(5), g 97.13(3)°, V 1442(1) Å 3 , Z = 1, a:b:c = 0.4422:1:1.1390. The strongest eight lines in the X-ray powderdiffraction pattern [d in Å(I)(hkl)] are as follows: 15.70(3)(001), 11.98(100)(011), 6.992(3)(021, 020), 5.992(6)(022), 3.448(5) (040), 2.967(5)(035), 2.4069(4)(154), 2.4002(4)(115, 135, 046, 062). The chemical analyses made with an electron microprobe yielded FeO 0.12, CuO 39.93, Al 2 O 3 0.13, As 2 O 5 44.71, H 2 O 17.31, total 102.20 wt.%. The resulting empirical formula on the basis of 63(O, OH, H 2 O) anions is (Cu 12.96 Al 0.07 Fe 0.04 ) S13.07 (AsO 4 ) 6.11 (AsO 3 OH) 3.93 •22.83H 2 O. The ideal end-member formula, Cu 13 (AsO 4 ) 6 (AsO 3 OH) 4 •23 H 2 O, requires CuO 39.26, As 2 O 5 43.36, H 2 O 17.10, total 100.00 wt. %. The crystal structure of slavkovite has been solved by direct method and refined to a final R obs of 4.37% on the basis of 6613 observed reflections collected on a single-crystal diffractometer with MoKa X-radiation. The crystal structure is based upon sheets consisting of copper polyhedra linked by arsenate and hydrogen arsenate tetrahedra. The sheets are linked by bridging Cu6-F polyhedra. In §

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“…The Huber open pit, exposing the apical, greisenized part of autometamorphosed Li-mica-topaz granite cupola, was mined for Sn and W ores in the past. Detailed descriptions of geology and mineralogy of the whole Sn-W ore district Krásno near Horní Slavkov were published by Beran and Sejkora (2006) and Sejkora et al (2006a, c).…”

Section: Occurrence and Sample Descriptionmentioning

confidence: 99%

Plimerite from Krásno near Horní Slavkov ore district, Czech Republic

Sejkora¹,

Plášil²,

Filip³

2012

Jour. Geosci.

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The Zn-dominant analogue of rockbridgeite, recently described mineral plimerite, was found in samples from the Huber open pit, the Krásno near Horní Slavkov ore district, western Bohemia, Czech Republic. Plimerite occurs there in five morphologically different types, as black-green to black semi-spherical to spheroidal radiating aggregates (type 1), olive to grey-green aggregates formed by minute tabular crystals (type 2), dark green crystalline aggregates composed of tiny tabular crystals (type 3) and two types (4 and 5) of microscopic aggregates. All plimerite types were found in cavities of strongly altered original triplite accumulations; fluorapatite, isokite, kolbeckite, leucophosphite, beraunite, whitmoreite, kunatite and other rare phosphates were found in the association. Detailed mineralogical data are given for plimerite type 1. , Z = 4. The crystal structure was refined by the Rietveld method from the high-resolution synchrotron powder diffraction data to indices R p 13.57%, R wp 18.59 % and R Bragg 13.92 % for 140 observed reflections. The refined crystal structure of plimerite from Krásno is related with those of rockbridgeite and of plimerite from Australia; the main differences are connected with the site-occupancies, derived from the site-symmetries and bond-valence parameters. Based on the crystal structure refinement, the formula for plimerite from Krásno is (Zn 1.20 Fe 0.80 ) Σ2.00 Fe (PO 4 ) 3 (OH) 5 . nH 2 O (where n is probably < 1), Z = 4.

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The Krásno Sn-W ore district near Horní Slavkov: Mining history, geological and mineralogical characteristics

Cited by 15 publications

References 6 publications

The nature and genesis of greisen stocks at Krásno, Slavkovský les area - Western Bohemia, Czech Republic

The nature and genesis of greisen stocks at Krásno, Slavkovský les area - Western Bohemia, Czech Republic

SLAVKOVITE, Cu13(AsO4)6(AsO3OH)4{middle dot}23H2O, A NEW MINERAL SPECIES FROM HORNI SLAVKOV AND JACHYMOV, CZECH REPUBLIC: DESCRIPTION AND CRYSTAL-STRUCTURE DETERMINATION

Plimerite from Krásno near Horní Slavkov ore district, Czech Republic

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