Szczegóły publikacji
Opis bibliograficzny
Phenakite and bertrandite: products of post-magmatic alteration of beryl in granitic pegmatites (Tatric Superunit, Western Carpathians, Slovakia) / Pavel Uher, Daniel Ozdín, Peter Bačík, Martin Števko, Martin Ondrejka, Olena Rybnikova, Štěpán Chládek, Jana Fridrichová, Jaroslav PRŠEK, Ľubica Puškelová // Mineralogical Magazine ; ISSN 0026-461X. — 2022 — vol. 86 iss. 5, s. 715–729. — Bibliogr. s. 727–729, Abstr. — Publikacja dostępna online od: 2022-08-18
Autorzy (10)
- Uher Pavel
- Ozdín Daniel
- Bačík Peter
- Števko Martin
- Ondejka Martin
- Rybnikova Olena
- Chládek Štěpán
- Fridrichová Jana
- AGHPršek Jaroslav
- Puškelová Ľubica
Słowa kluczowe
Dane bibliometryczne
| ID BaDAP | 143404 |
|---|---|
| Data dodania do BaDAP | 2022-11-05 |
| Tekst źródłowy | URL |
| DOI | 10.1180/mgm.2022.99 |
| Rok publikacji | 2022 |
| Typ publikacji | artykuł w czasopiśmie |
| Otwarty dostęp |  |
| Czasopismo/seria | Mineralogical Magazine |
Abstract
The beryllium silicate minerals phenakite and bertrandite have been identified in granitic pegmatite dykes of the beryl-columbite subtype of Variscan age (~340−355 Ma), associated with S- to I-type granitic rocks of the Tatric Superunit, Western Carpathians (Slovakia). The two beryllium silicates and associated minerals were characterised by electron microprobe analysis, back-scattered electron petrography and cathodoluminescence imagery, X-ray diffraction and micro-Raman techniques. Phenakite and bertrandite form euhedral-to-anhedral crystals and aggregates in irregular domains and veinlets replacing primary magmatic beryl. A detailed textural study revealed a close genetic association of phenakite and bertrandite with secondary fine-grained quartz, K-feldspar and muscovite. Locally, clay phyllosilicate minerals, (with compositions similar to those of Fe-dominant hydrobiotite, beidellite, nontronite and saponite) occur as the youngest minerals. During the post-magmatic (hydrothermal) stage of the pegmatites, infiltration of aqueous K-bearing fluids at T ≈ 200–400°C resulted in the breakdown of magmatic beryl to secondary assemblages containing phenakite and bertrandite.