Zirconium silicates in a peralkaline granite:a record of the interplay of magmatic and hydrothermal processes (Ilímaussaq complex, Greenland)
Compositional and textural data are presented for zircon, secondary Zr-silicates, catapleiite and elpidite in a peralkaline granite from the Ilímaussaq complex, south Greenland. The zircon is essentially stoichiometric, with (Zr + Hf + Si) = 1.96–1.98 a.p.f.u. The secondary Zr-silicates show a wide...
Published in: | Acta Geologica Polonica |
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2022
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Online Access: | https://eprints.lancs.ac.uk/id/eprint/173203/ https://doi.org/10.24425/agp.2022.140427 |
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ftulancaster:oai:eprints.lancs.ac.uk:173203 2023-08-27T04:09:43+02:00 Zirconium silicates in a peralkaline granite:a record of the interplay of magmatic and hydrothermal processes (Ilímaussaq complex, Greenland) Cegiełka, M. Bagiński, B. Macdonald, R. Belkin, H.E. Kotowski, J. Upton, B.G.J. 2022-06-08 https://eprints.lancs.ac.uk/id/eprint/173203/ https://doi.org/10.24425/agp.2022.140427 unknown Cegiełka, M. and Bagiński, B. and Macdonald, R. and Belkin, H.E. and Kotowski, J. and Upton, B.G.J. (2022) Zirconium silicates in a peralkaline granite:a record of the interplay of magmatic and hydrothermal processes (Ilímaussaq complex, Greenland). Acta Geologica Polonica, 72 (2). pp. 235-245. Journal Article PeerReviewed 2022 ftulancaster https://doi.org/10.24425/agp.2022.140427 2023-08-03T22:41:45Z Compositional and textural data are presented for zircon, secondary Zr-silicates, catapleiite and elpidite in a peralkaline granite from the Ilímaussaq complex, south Greenland. The zircon is essentially stoichiometric, with (Zr + Hf + Si) = 1.96–1.98 a.p.f.u. The secondary Zr-silicates show a wide range of Zr/Si atomic ratios (0.13–0.79). The catapleiite varies from close to stoichiometric to a Na-depleted type showing cation deficiency (5.2–5.8 a.p.f.u.). Elpidite shows similar variations (7.2–9.0 a.p.f.u.). Textural relationships between the Zr phases are interpreted to show that magmatic zircon interacted with hydrous fluids exsolved from the magma to form the secondary Zr-silicates. Formation of catapleiite was late-magmatic, in equilibrium with a Na-Sibearing fluid. This was followed by the crystallization of elpidite, the fluid having a different Na/Si ratio. Both catapleiite and elpidite experienced Na-loss during late-stage hydrothermal alteration. Article in Journal/Newspaper Greenland Lancaster University: Lancaster Eprints Greenland Acta Geologica Polonica |
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Lancaster University: Lancaster Eprints |
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ftulancaster |
language |
unknown |
description |
Compositional and textural data are presented for zircon, secondary Zr-silicates, catapleiite and elpidite in a peralkaline granite from the Ilímaussaq complex, south Greenland. The zircon is essentially stoichiometric, with (Zr + Hf + Si) = 1.96–1.98 a.p.f.u. The secondary Zr-silicates show a wide range of Zr/Si atomic ratios (0.13–0.79). The catapleiite varies from close to stoichiometric to a Na-depleted type showing cation deficiency (5.2–5.8 a.p.f.u.). Elpidite shows similar variations (7.2–9.0 a.p.f.u.). Textural relationships between the Zr phases are interpreted to show that magmatic zircon interacted with hydrous fluids exsolved from the magma to form the secondary Zr-silicates. Formation of catapleiite was late-magmatic, in equilibrium with a Na-Sibearing fluid. This was followed by the crystallization of elpidite, the fluid having a different Na/Si ratio. Both catapleiite and elpidite experienced Na-loss during late-stage hydrothermal alteration. |
format |
Article in Journal/Newspaper |
author |
Cegiełka, M. Bagiński, B. Macdonald, R. Belkin, H.E. Kotowski, J. Upton, B.G.J. |
spellingShingle |
Cegiełka, M. Bagiński, B. Macdonald, R. Belkin, H.E. Kotowski, J. Upton, B.G.J. Zirconium silicates in a peralkaline granite:a record of the interplay of magmatic and hydrothermal processes (Ilímaussaq complex, Greenland) |
author_facet |
Cegiełka, M. Bagiński, B. Macdonald, R. Belkin, H.E. Kotowski, J. Upton, B.G.J. |
author_sort |
Cegiełka, M. |
title |
Zirconium silicates in a peralkaline granite:a record of the interplay of magmatic and hydrothermal processes (Ilímaussaq complex, Greenland) |
title_short |
Zirconium silicates in a peralkaline granite:a record of the interplay of magmatic and hydrothermal processes (Ilímaussaq complex, Greenland) |
title_full |
Zirconium silicates in a peralkaline granite:a record of the interplay of magmatic and hydrothermal processes (Ilímaussaq complex, Greenland) |
title_fullStr |
Zirconium silicates in a peralkaline granite:a record of the interplay of magmatic and hydrothermal processes (Ilímaussaq complex, Greenland) |
title_full_unstemmed |
Zirconium silicates in a peralkaline granite:a record of the interplay of magmatic and hydrothermal processes (Ilímaussaq complex, Greenland) |
title_sort |
zirconium silicates in a peralkaline granite:a record of the interplay of magmatic and hydrothermal processes (ilímaussaq complex, greenland) |
publishDate |
2022 |
url |
https://eprints.lancs.ac.uk/id/eprint/173203/ https://doi.org/10.24425/agp.2022.140427 |
geographic |
Greenland |
geographic_facet |
Greenland |
genre |
Greenland |
genre_facet |
Greenland |
op_relation |
Cegiełka, M. and Bagiński, B. and Macdonald, R. and Belkin, H.E. and Kotowski, J. and Upton, B.G.J. (2022) Zirconium silicates in a peralkaline granite:a record of the interplay of magmatic and hydrothermal processes (Ilímaussaq complex, Greenland). Acta Geologica Polonica, 72 (2). pp. 235-245. |
op_doi |
https://doi.org/10.24425/agp.2022.140427 |
container_title |
Acta Geologica Polonica |
_version_ |
1775351279393964032 |