Szczegóły publikacji
Opis bibliograficzny
Cancrinite from nepheline syenite (mariupolite) of the Oktiabrski massif, SE Ukraine, and its growth history / Magdalena DUMAŃSKA-SŁOWIK, Adam PIECZKA, Wiesław HEFLIK, Magdalena Sikorska // Spectrochimica Acta. Part A, Molecular and Biomolecular Spectroscopy ; ISSN 1386-1425. — 2016 — vol. 157, s. 211–219. — Bibliogr. s. 219, Abstr. — Publikacja dostępna online od: 2016-01-07
Autorzy (4)
- AGHDumańska-Słowik Magdalena
- AGHPieczka Adam
- AGHHeflik Wiesław
- Sikorska Magdalena
Słowa kluczowe
Dane bibliometryczne
| ID BaDAP | 99994 |
|---|---|
| Data dodania do BaDAP | 2016-09-19 |
| Tekst źródłowy | URL |
| DOI | 10.1016/j.saa.2016.01.007 |
| Rok publikacji | 2016 |
| Typ publikacji | artykuł w czasopiśmie |
| Otwarty dostęp |  |
| Czasopismo/seria | Spectrochimica Acta, Part A, Molecular and Biomolecular Spectroscopy |
Abstract
Secondary cancrinite, (Na5.88K<0.01)Sigma(5.88)(Ca-0.62 Fe0.01Mn0.01Zn<0.01 Mg<(0.01))Sigma(0.64)[Si6.44Al O-5.56(24)](CO3)(0.67) (OH)(0.26)(F-<0.01,Cl-<0.01)center dot 2.04H(2)O), was found as accessory component of mariupolite (albite-aegirine nepheline syenite) from the Oktiabrski massif in the Donbass (SE Ukraine). It probably crystallized from a subsolidus reaction involving nepheline (and sodalite?) and calcite dissolved in the aqueous-carbonic fluid at the maximum temperature of 930 degrees C, decreasing to hydrothermal conditions. It is depleted in sodium, calcium and carbon, what results in the occurrence of vacant positions at both cationic and anionic sites. Ca-deficient cancrinite crystallized from the same hydrothermal Si-undersaturated fluids enriched in the ions such as Na+, Ca2+, Cl-, F-, HCO3-, which formed calcite, sodalite, natrolite and fluorite. It has dark-red CL colours with patchy zoning, what indicates the variable/diverse fluid composition during its formation. In the CL spectrum of cancrinite only one broad emission band at 410 nm is observed, which can be attributed to 0* center (the recombination of a free electron with an O- hole center). The formation of secondary CO3-rich species, i.e. cancrinite and calcite in mariupolite suggests that redox conditions in the Oktiabrski massif were oxidizing at the postmagmatic stage.
