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Petrogenetic implications of Ba-sanidine in the Lionato Tuff (Colli Albani Volcanic District, Central Italy)

Published online by Cambridge University Press:  05 July 2018

Mario Gaeta
Mario Gaeta*
Affiliation:
Dipartimento di Scienze della Terra, Università degli Studi di Roma, ‘La Sapienza’, Piazzale A. Moro 5, 1-00185 Rome, Italy
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Abstract

A vitric fiamme containing BaO-bearing sanidine (BaO = 11 wt.%) was sampled (via di Fioranello, Rome) in the pyroclastic products of the Lower Flow Unit (LFU) belonging to the Villa Senni Eruption Unit in the Colli Albani Volcanic District (Roman Comagmatic Province, Central Italy). The fiamme of the LFU is essentially made up of glass, in which scarce phenocrysts of BaO-bearing sanidine, leucite and Al2O3-bearing Ca-clinopyroxene occur. In this paper the various parameters controlling barium partitioning between alkali feldspar and LFU liquid, are discussed.

Keywords

Ba-sanidineK-foiditesAlban HillsCentral Italy
Type
Research Article
Information
Mineralogical Magazine , Volume 62 , Issue 5 , October 1998 , pp. 697 - 701
Copyright
Copyright © The Mineralogical Society of Great Britain and Ireland 1998

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