Mineralogical and geochemical studies of acid-sulfate alteration in the Shahrzad area, east of Esfahan, Central Iran
In the Cenozoic magmatic belt of Central Iran, the Eocene volcanics and pyroclastics from the Shahrzad area underwent extensive hydrothermal alteration. Major alteration zones show inclusions of propylite, quartz sericite, advanced argillic and silicified zones. Shahrzad alunites are mainly porcelaneous and their compositions show a solid solution between alunite and jarosite. In alteration zones, the mineral assemblage is characterized by alunite-jarosite + quartz + sericite + alkali feldspars + chlorite ± turquoise ± barite ± iron oxides. There are numerous alunite and jarosite occurrences, mainly as veinlets, in parts of the advanced argillic zone. Alunite δ18O and δD values range from −1.76 to 8.81 ‰ and from −52.86 to −129.26 ‰ respectively. Field observations, mineralogical evidence and results from light element stable isotope data (δ18O, δD and δ34S) indicate that the Shahrzad alunitization is of supergene origin.
No Reference information available - sign in for access.
No Citation information available - sign in for access.
No Supplementary Data.
Document Type: Research Article
Publication date: 2010-05-01
More about this publication?
- Neues Jahrbuch für Geologie und Paläontologie continuously publishes current original contributions from all fields of geology, ever since its foundation in 1807. All published contributions are in the English language.
- Editorial Board
- Information for Authors
- Subscribe to this Title
- Ingenta Connect is not responsible for the content or availability of external websites