Chevkinite-group minerals in selected intrusions of the Mazury Complex, North-Eastern Poland

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Marco E. Ciriotti
Messaggi: 29292
Iscritto il: ven 25 giu, 2004 11:31
Località: via San Pietro, 55 I-10073 Devesi/Cirié TO - Italy
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Chevkinite-group minerals in selected intrusions of the Mazury Complex, North-Eastern Poland

Messaggio da Marco E. Ciriotti » ven 21 gen, 2022 10:56

Referenza:
▪ Domańska-Siuda, J., Nejbert, K., Bagiński, B., Macdonald, R., Kotowski, J., Stachowicz, M. (2022): Chevkinite-group minerals in selected intrusions of the Mazury Complex, North-Eastern Poland: insights into the formation of a titanite-like phase by hydrothermal alteration. Mineralogy and Petrology, 116, (in press).

Abstract:
Chevkinite-group minerals forming large and common (up to 0.03 vol%) accessory phases in monzodiorites and granodiorites from the Mesoproterozoic anorthosite-mangerite-charnockite-granite (AMCG) suite intrusions, Mazury Complex, north-eastern Poland, range from pristine magmatic types to hydrothermally altered varieties. The unaltered phase is perrierite-(Ce), with the uncommon feature of having Al dominant in the C site. Hydrothermal alteration of the perrierite-(Ce) followed two main trends: one shows depletion in Ca, Fe, Si, Al and Mg, and increasing Ti contents; the other shows increases in Si, Ti and Ca and decreases in light rare-earth elements (LREE), Y and Mg, at about constant Fe content. The second trend resulted in the formation of a phase compositionally similar to titanite. Result of chemical analyses show that the transition from perrierite-(Ce) to the titanite-like phase is sharp; an electron back-scatter diffraction (EBSD) study shows the titanite- like material to be amorphous. The hydrothermal alteration of a chevkinite-group mineral to titanite has commonly been reported in natural sequences but this is the first record of the identification of a titanite-like phase made on the basis of a structural analysis.
Marco E. Ciriotti

«Things are interesting only in so far as they relate themselves to other things»

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Marco E. Ciriotti
Messaggi: 29292
Iscritto il: ven 25 giu, 2004 11:31
Località: via San Pietro, 55 I-10073 Devesi/Cirié TO - Italy
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Re: Chevkinite-group minerals in selected intrusions of the Mazury Complex, North-Eastern Poland

Messaggio da Marco E. Ciriotti » dom 20 mar, 2022 13:13

Pubblicazione avvenuta.

Referenza:
▪ Domańska-Siuda, J., Nejbert, K., Bagiński, B., Macdonald, R., Kotowski, J., Stachowicz, M. (2022): Chevkinite-group minerals in selected intrusions of the Mazury Complex, North-Eastern Poland: insights into the formation of a titanite-like phase by hydrothermal alteration. Mineralogy and Petrology, 116, 105–119.
Marco E. Ciriotti

«Things are interesting only in so far as they relate themselves to other things»

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