S,F,Cl-rich Mineral Assemblages from Burned Spoil Heaps in the Rosice-Oslavany Coalfield, Czech Republic

Geophysical Studies of Pyrometamorphic and Hydrothermal Rocks of the Nabi Musa Mottled Zone, Vicinity of the Dead Sea Transform, Israel

“…Phosphides were also found in burning coal spoil-heaps of Chelyabinsk, Russia ( Chesnokov and Shcherbakova, 1991); Fe-P alloys and pure metals have been reported in slags of incinerator residue of a municipal solid waste (Traber et al, 2002). Magnesioferrite and srebrodolskite have been recently reported in burnt spoil-heaps of Rosice-Oslavany coalfield, Czech Republic (Hršelová et al, 2013). The mineral phase similar to barioferrite has been observed in buchite from Želénky, North Bohemian Brown Coal Basin, Czech Republic (Žáček et al, 2005).…”

Pyrolysis of Technogenic-Redeposited Coal-Bearing Rocks of Spoil Heaps

“…Pyrolysis and the following pyrogenesis transform the coal-bearing strata of spoil heaps completely, creating new types of rock and both organic and inorganic compounds. Many researchers dedicated their studies to this topic and opened a new page in the study of mineralogy of techno genesis and pyrometamorphism [7][8][9][10][11][12][13][14]. However, the study of the pyrolysis of natural organic products is still a weak link in the knowledge of epigenetic changes occurring in the sedimentary complex of spoil heaps.…”

Field identification of minerals at burning coal dumps using miniature Raman spectrometers

“…Moreover, the mineral composition is subject to changes over the lifetime of a burning dump . Various oxides and silicates may occur in active burning zones as the result of thermal alteration at temperatures exceeding 1000 °C . Numerous volatile compounds including H 2 O, N 2 , CO 2 , CO, NH 3 , H 2 S, SO 2 , HCN, H 2 , as well as As, F, Cl, methane, and other hydrocarbons are released by the thermal decomposition of the coal mass, sulfides, and sedimentary rocks .…”

“…[10] Various oxides and silicates may occur in active burning zones as the result of thermal alteration at temperatures exceeding 1000°C. [11,12] Numerous volatile compounds including H 2 O, N 2 , CO 2 , CO, NH 3 , H 2 S, SO 2 , HCN, H 2 , as well as As, F, Cl, methane, and other hydrocarbons are released by the thermal decomposition of the coal mass, sulfides, and sedimentary rocks. [9,[13][14][15][16][17] At the surface, some minerals directly crystallize from the gases via a complex chain of reactions at temperatures ranging from 50 to 500°C.…”