• journal_title：The Canadian Mineralogist
• Contributor：Pavla Hršelová ; Jan Cempírek ; Stanislav Houzar ; Jiří Sejkora
• Publisher：Mineralogical Association of Canada
• Date：2013-02-01
• Format：text/html
• Language：en
• Identifier：10.3749/canmin.51.1.171
• journal_abbrev：Can Mineral
• issn：0008-4476
• volume：51
• issue：1
• firstpage：171
• section：Article

Rare oxide-sulfosilicate-sulfate mineral assemblages have been identified in burned material from two spoil heaps (Kukla mine, Oslavany, and Ferdinand mine, Zastávka) in the Rosice-Oslavany coalfield, Czech Republic. The assemblages are deficient in Si and Al, and contain high amounts of fluorine and chlorine; major minerals are gypsum, anhydrite, fluorellestadite, periclase, brucite, and portlandite. Accessory minerals include magnesioferrite, Mn-rich srebrodolskite, and rare kumtyubeite, Fe,Cl-rich brearleyite/mayenite, wadalite, fluorite, cuspidine, rondorfite, and an unnamed mineral with composition Ca₄(Mn,Fe)₂O₇. The assemblages are pyrometamorphic products of a dolomite-anhydrite-gypsum protolith, at T_min > 800 °C. The most probable source of halogens was organic matter.