Petr Sulovský

2009

• V. Zacek, R. Skoda, and P. Sulovsky, “U-Th-rich zircon, thorite and allanite-(Ce) as main carriers of
  radioactivity in the highly radioactive ultrapotassic melasyenite
  porphyry from the Sumava Mts., Moldanubian Zone, Czech Republic,” JOURNAL OF GEOSCIENCES, vol. 54, iss. 4, pp. 343-354, 2009.
  [Bibtex]

  @article ISI:000207803200003,
  Author = Zacek, Vladimir and Skoda, Radek and Sulovsky, Petr,
  Title = U-Th-rich zircon, thorite and allanite-(Ce) as main carriers of
     radioactivity in the highly radioactive ultrapotassic melasyenite
     porphyry from the Sumava Mts., Moldanubian Zone, Czech Republic,
  Journal = JOURNAL OF GEOSCIENCES,
  Year = 2009,
  Volume = 54,
  Number = 4,
  Pages = 343-354,
  Abstract = A melasyenite porphyry from the vicinity of Kasperske Hory (the Sumava
     Mts., Moldanubian Zone) shows a high natural radioactivity (K = 4.4-6.1
     wt. \%, eU = 15-24 ppm, eTh = 38-49 ppm). The most important carriers of
     U and Th are zircon, thorite, allanite-(Ce) and scarce monazite. Most of
     the zircon and thorite grains are altered by post-magmatic processes due
     to which especially zircon shows a large degree of chemical variability.
     Primary magmatic zircon is nearly stoichiometric, poor in ThO(2) (up to
     0.13 wt. \%) and UO(2) (up to 0.42 wt. \%). It often encloses strongly
     altered U- and Th-rich cores. These cores show a conspicuous zoning in
     the BSE. The bright zones are enriched in UO(2) (0.66-1.36 wt. \%) and
     ThO(2) (0.21-0.94 wt. \%) whereas the darker zones are highly enriched
     in CaO (up to 5.19 wt. \%), with UO(2) contents ranging between 0.95 and
     2.15 wt. \% and the ThO(2) between 0.99 and 1.67 wt. \%. The first
     percolation point of zircon was estimated at 0.4 D([dpa]). Thorite is
     also strongly altered, being depleted in Y,REE and Si in its more
     hydrated parts. A further consequence are strongly varying UO(2)
     contents (1.79-27.60 wt. \%) and locally enriched ZrO(2) (up to 10.92
     wt. \%), P(2)O(5) (0.22-6.39 wt. \%) and Y, REE (0.73-12.81 wt. \% of
     REE(2)O(3) and Y(2)O(3) combined). Elevated amounts of Fe, Ca, Pb, As,
     Al, S, and Ti were detected in the most hydrated parts. Allanite-(Ce) is
     weakly zoned with 0.20-1.22 wt. \% ThO(2) and up to 0.11 wt. \% UO(2).
     Scarce monazite-(Ce) has the ThO(2) contents (13.57-15.85 wt. \%)
     strongly prevailing over UO(2) (1.51-1.91 wt. \%).,
  DOI = 10.3190/jgeosci.053,
  ISSN = 1802-6222,
  Unique-ID = ISI:000207803200003,
  

• Z. Dolnicek, B. Fojt, W. Prochaska, J. Kucera, and P. Sulovsky, “Origin of the Zalesi U-Ni-Co-As-Ag/Bi deposit, Bohemian Massif, Czech
  Republic: fluid inclusion and stable isotope constraints,” MINERALIUM DEPOSITA, vol. 44, iss. 1, pp. 81-97, 2009.
  [Bibtex]

  @article ISI:000261692000006,
  Author = Dolnicek, Zdenek and Fojt, Bohuslav and Prochaska, Walter and Kucera,
     Jan and Sulovsky, Petr,
  Title = Origin of the Zalesi U-Ni-Co-As-Ag/Bi deposit, Bohemian Massif, Czech
     Republic: fluid inclusion and stable isotope constraints,
  Journal = MINERALIUM DEPOSITA,
  Year = 2009,
  Volume = 44,
  Number = 1,
  Pages = 81-97,
  Month = JAN,
  Abstract = The Zalesi vein-type deposit is hosted by Early Paleozoic high-grade
     metamorphic rocks on the northern margin of the Bohemian Massif. The
     mineralization is composed of three main stages: uraninite, arsenide,
     and sulfide. The mineral assemblages formed at low temperatures (80 to
     130A degrees C, locally even lower) and low pressures (< 100 bars). The
     salinity of the aqueous hydrothermal fluids (0 to 27 wt.\% salts) and
     their chemical composition vary significantly. Early fluids of the
     oldest uraninite stage contain a small admixture of a clathrate-forming
     gas, possibly CO(2). Salinity correlates with oxygen isotope signature
     of the fluid and suggests mixing of brines [delta (18)O around +2aEuro
     degrees relative to standard mean ocean water (SMOW)] with meteoric
     waters (delta (18)O around -4aEuro degrees SMOW). The fluid is
     characterized by highly variable halogen ratios (molar Br/Cl = 0.8 A-
     10(-3) to 5.3 A- 10(-3); molar I/Cl = 5.7 A- 10(-6) to 891 A- 10(-6))
     indicating a dominantly external origin for the brines, i.e., from
     evaporated seawater, which mixed with iodine-enriched halite dissolution
     brine. The cationic composition of these fluids indicates extensive
     interaction of the initial brines with their country rocks, likely
     associated with leaching of sulfur, carbon, and metals. The brines
     possibly originated from Permian-Triassic evaporites in the neighboring
     Polish Basin, infiltrated into the basement during post-Variscan
     extension and were finally expelled along faults giving rise to the
     vein-type mineralization. Cenozoic reactivation by low-salinity,
     low-delta (18)O (around -10aEuro degrees SMOW) fluids of mainly meteoric
     origin resulted in partial replacement of primary uraninite by
     coffinite-like mineral aggregates.,
  DOI = 10.1007/s00126-008-0202-6,
  ISSN = 0026-4598,
  Unique-ID = ISI:000261692000006,
  

2008

• S. Vrana and P. Sulovsky, "Polymetamorphic sapphirine rocks of the Irumide age in Lower Luangwa
  Valley, Zambia," NEUES JAHRBUCH FUR MINERALOGIE-ABHANDLUNGEN, vol. 184, iss. 3, pp. 315-328, 2008.
  [Bibtex]

  @article ISI:000254777700007,
  Author = Vrana, Stanislav and Sulovsky, Petr,
  Title = Polymetamorphic sapphirine rocks of the Irumide age in Lower Luangwa
     Valley, Zambia,
  Journal = NEUES JAHRBUCH FUR MINERALOGIE-ABHANDLUNGEN,
  Year = 2008,
  Volume = 184,
  Number = 3,
  Pages = 315-328,
  Month = MAR,
  Abstract = Mg-Al-rich rocks of the Southern Irumide Belt in Zambia contain mineral
     assemblages consisting of sapphirine-enstatiteminor spinet and later
     retrogressive anthophyllite-chlorite. The whole-rock compositions have
     high mg\#0.88 and 0.89 and indicate a sedimentary or volcanosedimentary
     protolith. The monazite-dominated pattern of normalized REE abundances
     is steep, with high LaN/YbN values of 96.1 and 67.4 and a negative Eu
     anomaly (Eu/Eu* = 0.58). The occurrence is an example of sapphirine
     formed near the low-temperature limit of its stability field.
     Sapphirine-enstatite geothermometry indicates (minimal) equilibration
     temperatures of 680-780 degrees C. This estimate is in agreement with
     relatively low Al2O3 contents in enstatite near 4.4 wt. \%. Chemical
     dating of monazite gave an Irumide age of metamorphic crystallization of
     1044 +/- 16 Ma. A minor fraction of monazite shows a superimposed
     partial recrystallization at similar to 520 Ma, during the Pan-African
     event. This younger recrystallization probably correlates with partial
     retrogression of enstatite and sapphirine to the assemblage
     anthophyllite-chlorite. Comparison with available data indicates that
     the studied sapphirine rocks, except their lower SiO2 content, are
     compositionally related to other magnesian-aluminous rocks such as
     kyanite-cordierite-anthophyllite/gedrite rocks, which also occur in the
     Palaeoproterozoic Muva Supergroup, or kyanite-quartz-talc schists in the
     Rufunsa Metavolcanic Formation.,
  DOI = 10.1127/0077-7757/2008/0101,
  ISSN = 0077-7757,
  Unique-ID = ISI:000254777700007,