Ba-Fe titanates in peralkaline granite of the Ilímaussaq Complex, South Greenland

A peralkaline granite of the Ilímaussaq Complex, South Greenland, contains the rare mineral henrymeyerite [(Ba0.92Na0.05Ca0.03)1.0(Ti6.87Fe2+1.04Nb0.03)7.9O16], a low-Fe Ba titanate [(Ba0.74Ca0.02Na0.05)0.8 (Ti4.9oFe2+0.15 Nb0.04)5.1O11], and an unidentified Ba titanosilicate. Both titanates show th...

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Bibliographic Details
Main Authors: Cegiełka, Małgorzata, Bagiński, Bogusław, Macdonald, Ray, Marciniak-Maliszewska, Beata, Stachowicz, Marcin
Format: Article in Journal/Newspaper
Language:English
Published: Faculty of Geology University of Warsaw 2022
Subjects:
Ilímaussaq peralkaline granite
Henrymeyerite
Low-Fe Ba Titanate
Greenland
Online Access:https://gq.pgi.gov.pl/agp/article/view/33308
Description
Summary:A peralkaline granite of the Ilímaussaq Complex, South Greenland, contains the rare mineral henrymeyerite [(Ba0.92Na0.05Ca0.03)1.0(Ti6.87Fe2+1.04Nb0.03)7.9O16], a low-Fe Ba titanate [(Ba0.74Ca0.02Na0.05)0.8 (Ti4.9oFe2+0.15 Nb0.04)5.1O11], and an unidentified Ba titanosilicate. Both titanates show the coupled substitution 2Na+ + Si4+ → Ba2+ + Ti4+. The minerals are present as tiny crystals fringing ilmenite inclusions in an amphibole crystal and are thought to have formed during the hydrothermal stage of the granite’s evolution.

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