Szczegóły publikacji
Opis bibliograficzny
Altered zircon from Ontario, Canada – an investigation from microscale to nanoscale / Fabian Tramm, Richard Wirth, Bartosz Budzyń, Grzegorz RZEPA, Gabriela A. KOZUB-BUDZYŃ, Jiří Sláma, Piotr JELEŃ, Vladimir Roddatis, Anja Schreiber, Milan Novák // Lithos ; ISSN 0024-4937 . — 2026 — vol. 522–523 art. no. 108375, s. 1–21. — Bibliogr. s. 20–21, Abstr. — Publikacja dostępna online od: 2025-12-10
Autorzy (10)
- Tramm Fabian
- Wirth Richard
- Budzyń Bartosz
- AGHRzepa Grzegorz
- AGHKozub-Budzyń Gabriela A.
- Sláma Jiří
- AGHJeleń Piotr
- Roddatis Vladimir
- Schreiber Anja
- Novák Milan
Słowa kluczowe
Dane bibliometryczne
| ID BaDAP | 165596 |
|---|---|
| Data dodania do BaDAP | 2026-02-03 |
| Tekst źródłowy | URL |
| DOI | 10.1016/j.lithos.2025.108375 |
| Rok publikacji | 2026 |
| Typ publikacji | artykuł w czasopiśmie |
| Otwarty dostęp |  |
| Czasopismo/seria | Lithos |
Abstract
Heavily altered zircon grains from a pegmatite from Ontario (Bancroft, Canada) were investigated using multiple microanalytical methods (EPMA, LA-ICPMS, Raman microspectroscopy), together with TEM and electron energy loss spectroscopy (EELS). The microscale study involved compositional and geochronological analyses, structural estimation, which was followed by investigation of selected textural domains at the nanoscale. The zircon grains display four distinct textural domains, which are: dom1 – primary, oscillatory zoned zircon; dom2 – zircon containing a fine network of cracks and faint oscillatory zoning; dom3 – secondary zircon, which follows former zoning or forms “finger-like” textures; and dom4 – heterogeneous, patchy zoned and microporous zircon containing numerous microinclusions. Compositional signatures indicate an igneous origin of dom1 and dom2, supported by concordant ages of ca. 1064 Ma. The dom3 and dom4 indicate hydrothermal origin, based on textural features caused by fluid-induced alteration that occurred in the Triassic as constrained by lower intercepts (240 ± 48 Ma and 197 ± 120 Ma) of discordant age data. At the nanoscale, primary zircon in dom1 displays an overall amorphous texture with finely distributed nanocrystals due to complete metamictization. Zircon in dom2 demonstrates a homogeneous crystalline structure, but with a moderate degree of radiation-damage. The secondary zircon of the dom3 finger-like textures is the result of multiple fluid-induced alteration mechanisms with fluids that followed primary zoning or fractures as pathways. The patchy zoned zircon in dom4 shows sharp nanoscale transitions with accumulation of U in bright patches, and accumulation of metallic Pb in dark patches, resulting in disturbed U and Pb signatures. The combination of microanalytical methods together with TEM enabled the reconstruction of the recorded history in the altered zircon grains. The presented nanotextures provide new insights important in the investigations of altered zircons from pegmatite and other metasomatically overprinted environments.
