Phosphate-bearing minerals in the advanced argillic alteration zones of high-sulphidation type ore deposits in the Carpatho-Pannonian region

Bajnóczi Bernadett and Seresné Hartai Éva and Nagy Géza: Phosphate-bearing minerals in the advanced argillic alteration zones of high-sulphidation type ore deposits in the Carpatho-Pannonian region. In: Acta mineralogica-petrographica, (45) 1. pp. 81-92. (2004)

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Abstract

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.

Item Type: Article
Journal or Publication Title: Acta mineralogica-petrographica
Date: 2004
Volume: 45
Number: 1
ISSN: 0365-8066
Page Range: pp. 81-92
Language: English
Publisher: Department of Mineralogy, Geochemistry and Petrology, University of Szeged
Place of Publication: Szeged
Related URLs: http://acta.bibl.u-szeged.hu/39426/
Uncontrolled Keywords: Földtan, Kőzettan, Ásványtan
Additional Information: Bibliogr.: p. 91-92. ; ill. ; összefoglalás angol nyelven
Subjects: 01. Natural sciences
01. Natural sciences > 01.05. Earth and related environmental sciences
Date Deposited: 2016. Oct. 17. 09:24
Last Modified: 2022. Aug. 23. 10:15
URI: http://acta.bibl.u-szeged.hu/id/eprint/25118

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