Tuhualite in a peralkaline rhyolite ignimbrite from Pantelleria, Italy

Bagiński, Bogusław and MacDonald, Raymond and White, John C. and Jezak, Lidia (2018) Tuhualite in a peralkaline rhyolite ignimbrite from Pantelleria, Italy. European Journal of Mineralogy, 30 (2). pp. 367-373. ISSN 0935-1221

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Abstract

An occurrence of the rare mineral tuhualite (NaFe3+Fe2+Si6O15) is reported in a peralkaline rhyolitic ignimbrite from the island of Pantelleria, Italy. The mineral formed during devitrification of glassy fiamme and varies in form from anhedral plates to perfectly euhedral in open vesicles. There is significant replacement of Fe2+ by Mn (≤0.37 atoms per formula unit (apfu)) and Zn (≤0.11 apfu), and of Na by K (≤0.13 apfu). The tuhualite possibly formed at temperatures <580 °C at fO2>FMQ in the presence of a hydrous fluid.

Item Type:
Journal Article
Journal or Publication Title:
European Journal of Mineralogy
Uncontrolled Keywords:
/dk/atira/pure/subjectarea/asjc/1900/1906
Subjects:
ID Code:
130780
Deposited By:
Deposited On:
25 Jan 2019 09:50
Refereed?:
Yes
Published?:
Published
Last Modified:
26 May 2020 07:34