| Reference Type | Journal (article/letter/editorial) |
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| Title | Zircon out, Elpidite in: Deformation-Driven Zirconosilicate Evolution in Peralkaline Granites: A Case Study of the Papanduva Pluton (Brazil) |
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| Journal | Minerals |
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| Authors | Grangeiro, Larissa P. | Author |
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| Vilalva, Frederico C. J. | Author |
| Vlach, Silvio R. F. | Author |
| Oliveira, Armando L. S. de | Author |
| Year | 2025 | Volume | < 15 > |
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| Issue | < 7 > |
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| URL | |
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| DOI | doi:10.3390/min15070667Search in ResearchGate |
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| Generate Citation Formats |
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| Classification | Not set | LoC | Not set |
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| Mindat Ref. ID | 18582344 | Long-form Identifier | mindat:1:5:18582344:3 |
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| GUID | 0 |
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| Full Reference | Grangeiro, Larissa P.; Vilalva, Frederico C. J.; Vlach, Silvio R. F.; Oliveira, Armando L. S. de (2025) Zircon out, Elpidite in: Deformation-Driven Zirconosilicate Evolution in Peralkaline Granites: A Case Study of the Papanduva Pluton (Brazil). Minerals, 15 (7). doi:10.3390/min15070667 |
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| Plain Text | Grangeiro, Larissa P.; Vilalva, Frederico C. J.; Vlach, Silvio R. F.; Oliveira, Armando L. S. de (2025) Zircon out, Elpidite in: Deformation-Driven Zirconosilicate Evolution in Peralkaline Granites: A Case Study of the Papanduva Pluton (Brazil). Minerals, 15 (7). doi:10.3390/min15070667 |
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| In | Link this record to the correct parent record (if possible) |
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| Abstract/Notes | The peralkaline granites of the Papanduva Pluton (South Brazil) display a remarkable facies dichotomy, with zircon dominant in massive facies and diverse zirconosilicates (Zr-Si) in foliated facies. This study employs petrography and mineral chemistry (major and trace elements) to elucidate the textural diversity and compositional evolution of these minerals. Three discrete zirconosilicate groups were identified: Na-rich elpidite ( euhedral, vein-like, and granular varieties), Na-poor (Na,K)Zr-Si-I, and silica-rich (Na,K)Zr-Si-II. Contrary to the expected crystallization sequences, trace element data reveal that REE enrichment correlates with deformation intensity rather than paragenetic order, with vein-like aggregates along deformation features showing the highest REE concentrations. Statistical analysis demonstrates significant correlations between REE contents and alkali exchange patterns. We propose a three-stage evolutionary model involving magmatic crystallization, deformation-enhanced fluid interaction, and late-stage recrystallization, with a progressive evolution from Na-dominated to K-dominated conditions. This study provides new insights into closed-system fluid evolution in agpaitic environments and highlights deformation as a primary control on element mobility in peralkaline granitic systems. |
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