Authors:
Bernadett BajnócziLaboratory for Geochemical Research, Hungarian Academy of Sciences, Budapest, Hungary H-1112 Budapest, Budaörsi út 45, Hungary

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Ferenc MolnárDepartment of Mineralogy, Eötvös L. University, Budapest, Hungary H-1117 Budapest, Pázmány P. sétány 1/c, Hungary

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Katsuhiko MaedaDepartment of Earth Resources Engineering, Kyushu University, Fukuoka, Japan 6-10-1 Hakozaki, Higashi-ku, Fukuoka 812-8581, Japan

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Et al.Department of Earth Resources Engineering, Kyushu University, Fukuoka, Japan 6-10-1 Hakozaki, Higashi-ku, Fukuoka 812-8581, Japan

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Alunites from the low sulfidation-type epithermal systems of the Tokaj and the high sulfidation-type epithermal systems of the Velence Mountains were compared in terms of mineralogical and genetic aspects Na-enriched (1.14 to 2.35% Na2O) tabular alunites from the advanced argillic alteration zones of the Velence Mountains appear in the cavities formed from leached phenocrysts of andesitic rocks. These magmatic-hydrothermal alunites display compositional zoning due to variation in Na and K content and contain Ca-rich phosphate-sulfates with REE elements in their cores (i.e., woodhouseite series). The source of P is probably magmatic apatite that dissolved during intensive leaching of the host rock by acidic magmatic-hydrothermal fluids. Alunites in the steam-heated alteration zones of the Tokaj Mountains appear in the cavities formed from leached pumice fragments of rhyolite tuff units or in fractures in altered rhyolite domes. Rhombohedral and platy alunites have minor Na content (0.02 to 0.61%Na2O) and display compositional zoning due to the variation in Ba content. However, comb alunites contain more Na (1.55 to 1.82% Na2O) and compositional zoning can be attributed to variation of Na and K content. Alunites from the Velence Mountains have much higher d34S values (24.2 to 25.3‰) compared to alunites from the Tokaj Mountains (4.7 to 8.6‰). The d18O values for the sulfate site in the alunite structure are between 10.6 and 13.6‰ in both areas. High d34S values can be attributed to S isotope fractionation during the high temperature magmatic-hydrothermal formation of alunite from the Velence Mountains, which did not occur during formation of low-temperature steam-heated alunites from the Tokaj Mountains.

  • Li, G., D. R. Peacor, E. J. Essene, D. R. Brosnahan, R. E. Beane 1992: Walthierite, Ba0,5o0,5Al3(SO4)2(OH)6 and huangite, Ca0,5o0,5Al3(SO4)2(OH)6, two new minerals of the alunite group from the Coquimbo region, Chile. American Mineralogist, 77, pp. 1275-1284.

    'Walthierite, Ba0,5o0,5Al3(SO4)2(OH)6 and huangite, Ca0,5o0,5Al3(SO4)2(OH)6, two new minerals of the alunite group from the Coquimbo region, Chile ' () 77 American Mineralogist : 1275 -1284 .

    • Search Google Scholar
  • Aoki, M., E. C. Comsti, F. B. Lazo, Y. Matsuhisa 1993: Advanced argillic alteration and geochemistry of alunite in an evolving hydrothermal system at Baguio, Northern Luzon, Philippines. Resource Geology, 43/3, pp. 155-164.

    'Advanced argillic alteration and geochemistry of alunite in an evolving hydrothermal system at Baguio, Northern Luzon, Philippines ' () 43 Resource Geology : 155 -164 .

    • Search Google Scholar
  • Arribas, A., Jr, C. G. Cunningham, J. J. Rytuba, R. O. Rye, W. C. Kelly, M. H. Podwysocki, E. H. Arribas, A., Jr, C. G. Cunningham, J. J. Rytuba, R. O. Rye, W. C. Kelly, M. H. Podwysocki, E. H. McKee, R. M. Tosdal 1995: Geology, geochronology, fluid inclusions and stable isotope geochemistry of the Rodalquilar gold alunite deposit, Spain. Economic Geology, pp. 795-822.

  • McKee, R. M. Tosdal 1995: Geology, geochronology, fluid inclusions and stable isotope geochemistry of the Rodalquilar gold alunite deposit, Spain. Economic Geology, 90, pp. 795-822.

    'Geology, geochronology, fluid inclusions and stable isotope geochemistry of the Rodalquilar gold alunite deposit, Spain ' () 90 Economic Geology : 795 -822 .

    • Search Google Scholar
  • Hedenquist, J. W., A. Arribas, Jr. 1999: Epithermal gold deposits. - In: Molnár, F., J. Lexa, J. W. Hedenquist (Eds): Epithermal mineralization of the Western Carpathians. - Society of Economic Geologists Guidebook, 31, pp. 13-63.

    Epithermal gold deposits , ().

  • Hedenquist, J. W., A. Arribas, Jr., T. J. Reynolds 1998: Evolution of an intrusion-centered hydrothermal system: Far Southeast-Lepanto porphyry and epithermal Cu-Au deposit, Philippines. - Economic Geology, 93/4, pp. 373-404.

    'Evolution of an intrusion-centered hydrothermal system: Far Southeast-Lepanto porphyry and epithermal Cu-Au deposit, Philippines ' () 93 Economic Geology : 373 -404 .

    • Search Google Scholar
  • Bajnuczi, B., F. Molnár, K. Maeda, E. Izawa 2000: Shallow level low-sulfidation type epithermal systems in the Regéc caldera, Central Tokaj Mts., NE-Hungary. - Geologica Carpathica, 51/4, pp. 217-227.

    'Shallow level low-sulfidation type epithermal systems in the Regéc caldera, Central Tokaj Mts., NE-Hungary ' () 51 Geologica Carpathica : 217 -227 .

    • Search Google Scholar
  • Clayton, R. N., T. K. Mayeda 1963: The use of bromine pentafluoride in the extraction of oxygen from oxides and silicates for isotope analysis. Geochimica et Cosmochimica Acta, 27, pp. 43-52.

    'The use of bromine pentafluoride in the extraction of oxygen from oxides and silicates for isotope analysis ' () 27 Geochimica et Cosmochimica Acta : 43 -52 .

    • Search Google Scholar
  • Dill, H. G., H.-R. Bosse, J. Kassbohm 2000: Mineralogical and chemical studies of volcanic-related argillaceous industrial minerals of the central American Cordillera (Western El Salvador). Economic Geology, 95, pp. 517-538.

    'Mineralogical and chemical studies of volcanic-related argillaceous industrial minerals of the central American Cordillera (Western El Salvador) ' () 95 Economic Geology : 517 -538 .

    • Search Google Scholar
  • Dobosi, K. 1978: Mineralogical-crystalchemical studies on Al-sulfate minerals from Hungary. - Unpublished M. Sc. Thesis, Department of Mineralogy, Etvs L. University, 146 p. (in Hungarian)

  • Gieré, R. 1996: Formation of rare earth minerals in hydrothermal systems. - In: Jones, A. P., F. Wall, C. T. Williams (Eds): Rare earth minerals. Chemistry, origin and ore deposits. Chapman & Hall, London, pp. 105-150.

    Formation of rare earth minerals in hydrothermal systems , () 105 -150 .

  • Giesemann, A., H-J. Jäger, A. L. Normann, H. R. Krouse, W. A. Brand 1994: Online sulfur-isotope determination using an elemental analyzer coupled to a mass spectrometer. - Analytical Chemistry, 66/18, pp. 2816-2819.

    'Online sulfur-isotope determination using an elemental analyzer coupled to a mass spectrometer ' () 66 Analytical Chemistry : 2816 -2819 .

    • Search Google Scholar
  • Hedenquist, J. W., Y. Matsuhisa, E. Izawa, N. C. White, W. F. Giggenbach, M. Aoki 1994: Geology, geochemistry, and origin of high-sulfidation Cu-Au mineralization in the Nansatsu District, Japan. - Economic Geology, 89/1, pp. 1-30.

    'Geology, geochemistry, and origin of high-sulfidation Cu-Au mineralization in the Nansatsu District, Japan ' () Economic Geology : 1 -30 .

    • Search Google Scholar
  • Hemley, J. J., P. B. Hostetler, A. J. Gude, W. T. Mountjoy 1969: Some stability relations of alunite. Economic Geology, 64, pp. 599-612.

    'Some stability relations of alunite ' () 64 Economic Geology : 599 -612 .

  • Itaya, T., A. Arribas, T. Okada 1996: Argon release systematics of hypogene and supergene alunite based on progressive heating experiments from 100 to 1000°C. - Geochimica et Cosmochimica Acta, 60/22, pp. 4525-4535.

  • Meyer, C. A., J. J. Hemley 1967: Wall rock alteration. - In: Barnes, H. L. (Ed): Geochemistry of hydrothermal ore deposits. Holt, Rinehart and Winston, New York, pp. 166-235.

    Wall rock alteration , () 166 -235 .

  • Molnár, F. 1988: Genetical pecularities of the mercury indications near Sárospatak (Tokaj Mts., NEHungary) on the basis of fluid inclusion studies. Acta Mineralogica-Petrographica Szeged, 29, pp. 57-68.

    'Genetical pecularities of the mercury indications near Sárospatak (Tokaj Mts., NEHungary) on the basis of fluid inclusion studies ' () 29 Acta Mineralogica-Petrographica Szeged : 57 -68 .

    • Search Google Scholar
  • Molnár, F. 1993: Genesis of ore deposits and indications of the Tokaj Mountains on the basis of fluid inclusion studies. - Unpublished Ph. D. Thesis, Department of Mineralogy, Etvs L. University, Budapest, 177 p.

  • Molnár, F. 1996: Fluid inclusion characteristics of Variscan and Alpine metallogeny of the Velence Mts., W-Hungary. - In: Popov, P. (Ed): Plate tectonic aspects of the Alpine metallogeny in the Carpatho-Balkan region. - Proceedings of the Annual Meeting, Sofia, 1996. UNESCO-IGCP Project No. 356., vol. 2, pp. 29-44.

  • Rye, R. O., P. M. Bethke, M. D. Wasserman 1992: The stable isotope geochemistry of acid sulfate alteration. - Economic Geology, 87/2, pp. 225-262.

    'The stable isotope geochemistry of acid sulfate alteration ' () 87 Economic Geology : 225 -262 .

    • Search Google Scholar
  • Serna, C. J., C. P. Cortina, J. V. G. Ramos 1986: Infrared and Raman study of alunite-jarosite compounds. - Spetrochimica Acta, 42A/6, pp. 729-734.

    'Infrared and Raman study of alunite-jarosite compounds ' () 42A Spetrochimica Acta : 729 -734 .

    • Search Google Scholar
  • Stoffregen, R. E., C. N. Alpers 1987: Woodhouseite and svanbergite in hydrothermal ore deposits: products of apatite destruction during advanced argillic alteration. - Canadian Mineralogist, 25/2, pp. 201-211.

    'Woodhouseite and svanbergite in hydrothermal ore deposits: products of apatite destruction during advanced argillic alteration ' () 25 Canadian Mineralogist : 201 -211 .

    • Search Google Scholar
  • Molnár, F., Z. Pécskay 2000: A Tokaji-hegység kálium-dásulásait létrehozu folyamatok genetikája (Genesis of potassium enrichment in the Tokaj Mountains). - Fldtani Kutatás, 37/3, pp. 5-13.

    'A Tokaji-hegység kálium-dásulásait létrehozu folyamatok genetikája (Genesis of potassium enrichment in the Tokaj Mountains) ' () 37 Fldtani Kutatás : 5 -13 .

    • Search Google Scholar
  • Molnár, F., T. Zelenka, E. Mátyás, Z. Pécskay, B. Bajnuczi, J. Kiss, I. Horváth 1999: Epithermal mineralization of the Tokaj Mountains, Northeast Hungary: Shallow levels of low-sulfidation type systems. - In: Molnár, F., J. Lexa, J. W. Hedenquist (Eds): Epithermal mineralization of the Western Carpathians. - Society of Economic Geologists Guidebook, 31, pp. 109-153.

    Epithermal mineralization of the Tokaj Mountains, Northeast Hungary: Shallow levels of low-sulfidation type systems , () 109 -153 .

    • Search Google Scholar
  • Velinov, I. A., M. V. Gorova, H. N. Neykov 1991: Svanbergite and woodhouseite from the Asarel porphyry-copper deposit (Bulgaria). Comptes rendus de l'Academie bulgare des Sciences, 44/2, pp. 45-48.

    'Svanbergite and woodhouseite from the Asarel porphyry-copper deposit (Bulgaria) ' () 44 Comptes rendus de l'Academie bulgare des Sciences : 45 -48 .

    • Search Google Scholar
  • Vendl A. (1931): A nadapi alunit (Alunite from Nadap). - Mathematikai és Természetudományi…rtesítý, 31, pp. 95-101.

    'A nadapi alunit (Alunite from Nadap) ' () 31 Mathematikai és Természetudományi…rtesítý : 95 .

    • Search Google Scholar
  • Wasserman, M. D., R. O. Rye, P. M. Bethke, A. Arribas, Jr. 1992: Methods for separation and total isotope analysis of alunite. - USGS Open-file Report, 92-9, pp. 1-20.

    'Methods for separation and total isotope analysis of alunite ' () 92 USGS Open-file Report : 1 -20 .

    • Search Google Scholar
  • Wise, W. S. 1975: Solid solution between the alunite, woodhouseite and crandallite minerals series. Neues Jahrbuch für Mineralogie Monatschefte, 12, pp. 540-545.

    'Solid solution between the alunite, woodhouseite and crandallite minerals series ' () 12 Neues Jahrbuch für Mineralogie Monatschefte : 540 -545 .

    • Search Google Scholar
  • Stoffregen, R. E., G. L. Cygan 1990: An experimental study of Na-K exchange between alunite and aqueous sulfate solutions. American Mineralogist, 75, pp. 209-220.

    'An experimental study of Na-K exchange between alunite and aqueous sulfate solutions ' () 75 American Mineralogist : 209 -220 .

    • Search Google Scholar
  • Ueda, A., H. Sakai 1983: Simultaneous determinations of the concentration and isotope ratio of sulfate- and sulfide-sulfur and carbonate-carbon in geological samples. Geochemical Journal, 17, pp. 185-196.

    'Simultaneous determinations of the concentration and isotope ratio of sulfate- and sulfide-sulfur and carbonate-carbon in geological samples ' () 17 Geochemical Journal : 185 -196 .

    • Search Google Scholar
  • Van der Marel, H. W., H. Beutelspacher 1976: Atlas of infrared spectroscopy of clay minerals and their admixtures. Elsevier, Amsterdam-Oxford-New York, 396 p.

    Atlas of infrared spectroscopy of clay minerals and their admixtures , () 396 .

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Acta Geologica Hungarica
Language English
Size  
Year of
Foundation
1952
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Programme
changed title
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Founder Magyar Tudományos Akadémia  
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H-1051 Budapest, Hungary, Széchenyi István tér 9.
Publisher Akadémiai Kiadó
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H-1117 Budapest, Hungary 1516 Budapest, PO Box 245.
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Chief Executive Officer, Akadémiai Kiadó
ISSN 0236-5278 (Print)
ISSN 1588-2594 (Online)

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