Phosphate-bearing minerals in the advanced argillic alteration zones of high-sulphidation type ore deposits in the Carpatho-Pannonian region
Ca-dominant, Al-phosphate-sulphate (APS) minerals with minor Ba. Sr, K, Na and REE contents were found in hydrothermal alunite or separately in advanced argillic alteration zones associated with high-sulphidation type epithermal systems in Hungary (Velence Mountains) and Slovakia (Podpolom deposit,...
Elmentve itt :
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| Dokumentumtípus: | Cikk |
| Megjelent: |
Department of Mineralogy, Geochemistry and Petrology, University of Szeged
Szeged
2004
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| Sorozat: | Acta mineralogica-petrographica
45 No. 1 |
| Kulcsszavak: | Földtan, Kőzettan, Ásványtan |
| Tárgyszavak: | |
| Online Access: | http://acta.bibl.u-szeged.hu/25118 |
| Tartalmi kivonat: | Ca-dominant, Al-phosphate-sulphate (APS) minerals with minor Ba. Sr, K, Na and REE contents were found in hydrothermal alunite or separately in advanced argillic alteration zones associated with high-sulphidation type epithermal systems in Hungary (Velence Mountains) and Slovakia (Podpolom deposit, KlokoC). Electron microprobe analyses show that these APS minerals are woodhouseite with S04 2 " and P04 3 " molar ratio varying between 1:3 and 2:1. The occurrence of APS minerals in close association with alunite and other hydrothermal minerals indicates a hypogene origin for these phases. Extensive leaching of magmatic minerals (apatite, feldspar) in the host rock by strongly acidic magmatic-hydrothermal fluids induced the formation of phosphate-bearing minerals. Changing physico-chemical characteristics of the hydrothermal fluids with time resulted in zoning and multiphase formation of these alunite-type minerals, with a common late phase dominated by pure sulphate (alunite). This is the first detailed documentation of hydrothermal APS minerals in alteration systems of the Carpatho-Pannonian region. |
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| Terjedelem/Fizikai jellemzők: | 81-92 |
| ISSN: | 0365-8066 |