 | | Journal (article/letter/editorial) | | Sokolovská uhelná a.s., Jednoty 1628, CZ-35645 Sokolov, Czech Republic ABSTRACT Ochreous precipitates deposited...lignite seam exposed in an abandoned mine in the Czech Republic show marked variations in color and mineralogy...minerals were formed. INTRODUCTION Pyrite and marcasite are common ancillary minerals in lignites, coals...associated rocks. Their proportions can vary widely. When pyrite and marcasite are exposed to the ambient atmosphere...ochreous Fe3+-bearing precipitates. Pyrite and marcasite associated with lignites and coals commonly exist |  | Osborne, O. D., Pring, A., Popelka-Filcoff, R. S., Bennett, J. W., Stopic, A., Glascock, M. D., Lenehan, C. E. (2012) Comparison of the relative comparator and k0 neutron activation analysis techniques for the determination of trace-element concentrations in pyrite. Mineralogical Magazine, 76 (5) 1229-1245 doi:10.1180/minmag.2012.076.5.04 | Journal (article/letter/editorial) | | hydrogen peroxide; the reaction rate was found to vary by O. D. OSBORNE ET AL. almost an order of magnitude...scale. The trace element distribution in pyrite may vary across the same grain; porous or fractured areas...Nikolaevskiy mine, Dal’negorsk, Russia Lomnice, Czech Republic Siglo XX mine, Llallagua, Bolivia Quiruvilca... J.D. (1984) Rates of reaction of pyrite and marcasite with ferric iron at pH 2. Geochimica et Cosmochimica...element analysis of pyrite from the Xiaoqinling gold district, China: implications for ore genesis. Ore Geology |  | | Journal (issue) | | method of extracting the rocks will, of course, vary from-location to location and will depend to some...fascinating minerals like calcite, nodules of pyrite or marcasite. The best way to assess whether a particular deposit...which are laid down in recognisable strata - cl1is region is characterised by irregula·r outcrops of crystalline...pillars tl1at support the cavern roof. The Lake District and the northern Pennines arc other prime sites...high ash Below: Gold mining in the Serra Pelada region of Para State. Note the enormous amount of tree |  | | Book (volume) | | minerals from the National Museum in Prague, Czech Republic; the number of mineral species presented in...cm1 is called the fingerprint region. Usually IR spectrum in this region contains very complicated series...overlapping bands. The importance of the fingerprint region is that each mineral species produces a different...500 to 800 cm1 can be considered as “fingerprint region” sensitive to the composition and the topological...see Fig. 1.9), but generally IR spectrum in this region is characteristic of all these minerals. In IR |  | | Book | | and Bay of Fundy, Nova Scotia, Canada; Glasgow region, Scotland, and England, U.K; Italy; U.S.S.R; and...Hill Quarries, near Parramatta, in the Sydney district (Chalmers, 1968). It also forms colorless, transparent...in Tertiary basalt at Mount Bell, in the Moina district (Chalmers, 1968). Analcime is found along the... Nearby cavities contain ferrierite, pyrite, marcasite, quartz, siderite, sphalerite, chalcopyrite, pyrrhotite...analcime in amygdaloidal basalt at Morcinov, near Lomnice nad Popelkou. ANALCIME /53 Analcime and phillipsite | | | Book | | and Bay of Fundy, Nova Scotia, Canada; Glasgow region, Scotland, and England, U.K; Italy; U.S.S.R; and...Hill Quarries, near Parramatta, in the Sydney district (Chalmers, 1968). It also forms colorless, transparent...in Tertiary basalt at Mount Bell, in the Moina district (Chalmers, 1968). Analcime is found along the... Nearby cavities contain ferrierite, pyrite, marcasite, quartz, siderite, sphalerite, chalcopyrite, pyrrhotite...analcime in amygdaloidal basalt at Morcinov, near Lomnice nad Popelkou. ANALCIME /53 Analcime and phillipsite |
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Lomnice, Sokolov District, Karlovy Vary Region, Czech Republic