Szczegóły publikacji
Opis bibliograficzny
Origin and occurrence of gem-quality, skarn-hosted barite from Jebel Ouichane near Nador in Morocco / Magdalena DUMAŃSKA-SŁOWIK, Beata Naglik, Tomasz TOBOŁA, Tomasz POWOLNY, Miłosz Huber, Stanislava Milovska, Natalia Dobosz, Kamil Guzik, Aleksandra Wesełucha-Birczyńska // Scientific Reports [Dokument elektroniczny]. — Czasopismo elektroniczne ; ISSN 2045-2322. — 2021 — vol. 11 art. no. 10307, s. 1–16. — Wymagania systemowe: Adobe Reader. — Bibliogr. s. 14–16. — Publikacja dostępna online od: 2021-05-13
Autorzy (9)
- AGHDumańska-Słowik Magdalena
- Naglik Beata
- AGHToboła Tomasz
- AGHPowolny Tomasz
- Huber Miłosz
- Milovska Stanislava
- AGHDobosz Natalia
- Guzik Kamil
- Wesełucha-Birczyńska Aleksandra
Dane bibliometryczne
| ID BaDAP | 134407 |
|---|---|
| Data dodania do BaDAP | 2021-06-01 |
| Tekst źródłowy | URL |
| DOI | 10.1038/s41598-021-89692-5 |
| Rok publikacji | 2021 |
| Typ publikacji | artykuł w czasopiśmie |
| Otwarty dostęp |  |
| Creative Commons | |
| Czasopismo/seria | Scientific Reports |
Abstract
Light-blue barite from Jebel Ouichane in Morocco forms blade-like tabular crystals (up to ca. 10 cm) with superb transparency and lustre and represents one of the most spectacular gem-quality worldwide. The barite is hosted by iron-ore-bearing skarns, developed within Jurassic-Cretaceous limestones, and occurs in close spatial association with calcite. The crystals have their cores enriched in Sr and contain abundant monophase (liquid) fluid inclusions of primary and pseudosecondary origin. The barite probably precipitated slowly at a relatively low supersaturation and under the control of a surface reaction precipitation mechanism. However, there were some episodes during its formation with a fast growth rate and the coupled dissolution and recrystallization processes. A combination of fluid inclusion data and stable δ18O value for barite (+ 6.71‰ VSMOW) suggests that low-salinity barite-forming solutions resulted from the mixing of strongly-diluted meteoric waters (enriched in light oxygen isotope) with magmatic-hydrothermal fluids under low-temperature conditions (< 100 °C). Meanwhile, the mineralizing fluids must have been enriched in Ba, Sr, Ca, Mg, and other elements derived from the alteration of carbonate and silicate minerals in sedimentary and igneous rocks. The coupling between sulphur and oxygen isotope data (+ 16.39‰ VCDT and + 6.71‰ VSMOW, respectively) further suggests that barite crystallized in steam-heated environment, where SO42- derived from magmatic-hydrothermal SO2 reacted with sulphates that originate from the oxidation of H2S under near-surface conditions.
