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Metamorphic vanadian-chromian silicate mineralization in carbon-rich amphibole schists from the Malé Karpaty Mountains, Western Carpathians, Slovakia

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Published/Copyright: April 1, 2015
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American Mineralogist
From the journal American Mineralogist Volume 93 Issue 1

Abstract

Mineralization, involving vanadian-chromian silicates, has been studied in Lower Paleozoic, carbon-rich amphibole schists with pyrite and pyrrhotite near Pezinok, southwest Slovakia. A detailed electron microprobe study has revealed the presence of V,Cr-rich garnet, clinozoisite, and muscovite, associated with amphiboles (magnesiohornblende, tremolite, actinolite, and edenite), diopside, and albite. The garnet contains 5-19 wt% V2O3, 5-11 wt% Cr2O3, and 2-13 wt% Al2O3 (16-64 mol% goldmanite, 19-36 mol% uvarovite, and 9-59 mol% grossular end-members). The garnet is unzoned or shows V-rich cores and Al-rich rims, or irregular coarse oscillatory zoning with V, Cr, and Al, locally involving Ca and Mn as well. The V,Cr-rich clinozoisite to mukhinite and “chromian clinozoisite” contains 2-9.5 wt% V2O3 and 1.5-11 wt% Cr2O3; the muscovite contains 2.5-8 wt% V2O3 and 0-7 wt% Cr2O3. The mineralization originated from primarily V-, Cr-, and C-rich mafic pyroclastic rocks, affected by volcano-exhalative processes. These rocks were weakly metamorphosed during early Hercynian regional metamorphism (M1), followed by late-Hercynian contact metamorphism (M2) with crystallization of V,Cr-rich silicates, diopside, amphiboles, phlogopite, titanite, albite, quartz, carbonate, pyrite, and pyrrhotite. The youngest Alpine(?) retrograde metamorphic event (M3) is connected with production of V,Cr-poor muscovite, clinochlore, clinozoisite, pumpellyite-(Mg), prehnite, quartz, and carbonates, under prehnite-pumpellite facies conditions.

Keywords : V and Cr mineralization; amphibole schists; contact metamorphism; goldmanite; uvarovite; mukhinite; Western Carpathians; Slovakia
Received: 2006-10-5
Accepted: 2007-9-4
Published Online: 2015-4-1
Published in Print: 2008-1-1

© 2015 by Walter de Gruyter Berlin/Boston

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  1. Footemineite, the Mn-analog of atencioite, from the Foote mine, Kings Mountain, Cleveland County, North Carolina, U.S.A., and its relationship with other roscherite-group minerals
  2. Element mobility and scale of mass transport in the formation of quartz veins during regional metamorphism of the Waits River Formation, east-central Vermont
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  4. Chemical and physical transfers in an ultramafic rock weathering profile: Part 2. Dissolution vs. accumulation of platinum group minerals
  5. Comparative Raman spectroscopic study on ilmenite-type MgSiO3 (akimotoite), MgGeO3, and MgTiO3 (geikielite) at high temperatures and high pressures
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  11. Single-crystal X-ray and Raman investigation on melanophlogite from Varano Marchesi (Parma, Italy)
  12. Direnzoite, [NaK6MgCa2(Al13Si47O120)·36H2O], a new zeolite from Massif Central (France): Description and crystal structure
  13. On twinning and microstructures in calcite and dolomite
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  15. Crystal-size distribution and composition of garnets in eclogites from the Dabie orogen, central China
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  22. Electron backscatter diffraction analysis of zircon: A systematic assessment of match unit characteristics and pattern indexing optimization
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  24. Synthesis and characterization of low-OH– fluor-chlorapatite: A single-crystal XRD and NMR spectroscopic study
  25. Pressure dependence of the hydrogen-bond geometry in topaz-OD from neutron powder diffraction
  26. Environments around Al, Si, and Ca in aluminate and aluminosilicate melts by X-ray absorption spectroscopy at high temperature
  27. The origin of S4+ detected in silicate glasses by XANES
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https://doi.org/10.2138/am.2008.2470
Keywords for this article
V and Cr mineralization; amphibole schists; contact metamorphism; goldmanite; uvarovite; mukhinite; Western Carpathians; Slovakia

Articles in the same Issue

  1. Footemineite, the Mn-analog of atencioite, from the Foote mine, Kings Mountain, Cleveland County, North Carolina, U.S.A., and its relationship with other roscherite-group minerals
  2. Element mobility and scale of mass transport in the formation of quartz veins during regional metamorphism of the Waits River Formation, east-central Vermont
  3. Chemical and physical transfers in an ultramafic rock weathering profile: Part 1. Supergene dissolution of Pt-bearing chromite
  4. Chemical and physical transfers in an ultramafic rock weathering profile: Part 2. Dissolution vs. accumulation of platinum group minerals
  5. Comparative Raman spectroscopic study on ilmenite-type MgSiO3 (akimotoite), MgGeO3, and MgTiO3 (geikielite) at high temperatures and high pressures
  6. A low-pressure–high-temperature technique for the piston-cylinder
  7. Pressure-induced structural deformation and elastic behavior of wairakite
  8. Metamorphic vanadian-chromian silicate mineralization in carbon-rich amphibole schists from the Malé Karpaty Mountains, Western Carpathians, Slovakia
  9. High-temperature deformation of volcanic materials in the presence of water
  10. Menezesite, the first natural heteropolyniobate, from Cajati, São Paulo, Brazil: Description and crystal structure
  11. Single-crystal X-ray and Raman investigation on melanophlogite from Varano Marchesi (Parma, Italy)
  12. Direnzoite, [NaK6MgCa2(Al13Si47O120)·36H2O], a new zeolite from Massif Central (France): Description and crystal structure
  13. On twinning and microstructures in calcite and dolomite
  14. Density functional calculations of the electronic structure and optical properties of aluminosilicate polymorphs (Al2SiO5)
  15. Crystal-size distribution and composition of garnets in eclogites from the Dabie orogen, central China
  16. Cation order/disorder behavior and crystal chemistry of pyrope-grossular garnets: An 17O 3QMAS and 27Al MAS NMR spectroscopic study
  17. Analytical transmission electron microscopy study of a natural MORB sample assemblage transformed at high pressure and high temperature
  18. Barioperovskite, BaTiO3, a new mineral from the Benitoite Mine, California
  19. The nature of unusual luminescence in natural calcite CaCO3
  20. Carbonate in igneous and metamorphic fluorapatite: Two type A and two type B substitutions
  21. The crystal structure of diopside at pressure to 10 GPa
  22. Electron backscatter diffraction analysis of zircon: A systematic assessment of match unit characteristics and pattern indexing optimization
  23. Compressibility trends of the clinopyroxenes, and in-situ high-pressure single-crystal X-ray diffraction study of jadeite
  24. Synthesis and characterization of low-OH– fluor-chlorapatite: A single-crystal XRD and NMR spectroscopic study
  25. Pressure dependence of the hydrogen-bond geometry in topaz-OD from neutron powder diffraction
  26. Environments around Al, Si, and Ca in aluminate and aluminosilicate melts by X-ray absorption spectroscopy at high temperature
  27. The origin of S4+ detected in silicate glasses by XANES
  28. Effects of ionizing radiation on the hollandite structure-type: Ba0.85Cs0.26Al1.35Fe0.77Ti5.90O16
  29. Letter. Toward a thermal model for the Skaergaard liquidus
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