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Interstitial magmatic scapolite in glass-bearing crystalline nodules from the Kula Volcanic Province, Western Turkey

Published online by Cambridge University Press:  05 July 2018

G. C. Smith*
Affiliation:
Department of Earth Sciences, Downing Street, Cambridge CB2 3EQ, UK
M. B. Holness
Affiliation:
Department of Earth Sciences, Downing Street, Cambridge CB2 3EQ, UK
J. M. Bunbury
Affiliation:
Department of Earth Sciences, Downing Street, Cambridge CB2 3EQ, UK
*

Abstract

Scapolite oikocrysts, up to 3 cm in diameter, occur in cognate, cumulate nodules from the 2 Ma rift-related, alkali-basaltic Kula Volcanic Province in Western Turkey. Three scapolite-bearing nodules were found within deposits originating from two adjacent cones. They contain primocrysts of clinopyroxene, biotite, apatite and titanite, together with interstitial kaersutite, biotite, plagioclase and scapolite. Kula scapolites fall mid-way between the meionite (Ca4[Al6Si6O24]CO3) and marialite (Na4[Al3Si9O24]Cl) end-members (∼Me4571). We believe this to be the first report of interstitial magmatic scapolite.

Type
Research Article
Copyright
Copyright © The Mineralogical Society of Great Britain and Ireland 2008

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