Szczegóły publikacji
Opis bibliograficzny
Inclusion study of hourglass amethyst from Boudi (Morocco) by Raman microspectroscopy and microthermometric measurements / Magdalena DUMAŃSKA-SŁOWIK, Tomasz TOBOŁA, Katarzyna Jarmołowicz-Szulc, Beata NAGLIK, Joanna Dyląg, Jacek Szczerba // Spectrochimica Acta. Part A, Molecular and Biomolecular Spectroscopy ; ISSN 1386-1425. — 2017 — vol. 187, s. 156–162. — Bibliogr. s. 162, Abstr. — Publikacja dostępna online od: 2017-07-02
Autorzy (6)
- AGHDumańska-Słowik Magdalena
- AGHToboła Tomasz
- Jarmołowicz-Szulc Katarzyna
- AGHNaglik Beata
- AGHDyląg Joanna
- Szczerba Jacek
Słowa kluczowe
Dane bibliometryczne
| ID BaDAP | 110485 |
|---|---|
| Data dodania do BaDAP | 2017-12-22 |
| Tekst źródłowy | URL |
| DOI | 10.1016/j.saa.2017.06.053 |
| Rok publikacji | 2017 |
| Typ publikacji | artykuł w czasopiśmie |
| Otwarty dostęp |  |
| Czasopismo/seria | Spectrochimica Acta, Part A, Molecular and Biomolecular Spectroscopy |
Abstract
Amethyst from Boudi with characteristic hourglass colour zoning hosts numerous pseudo-secondary fluid and mineral inclusions. Measured values of temperature homogenization (T-h) for selected fluid inclusion assemblages (FIA) in colourless and violet regions of the crystal range from 154 to 330 degrees C. The higher temperatures values are characteristic for violet zones than colourless regions of the crystal. The brine content and concentration vary from 5.71 to 13.94 wt% NaCl eq. Raman spectra of selected fluid inclusions revealed they are mainly composed of H2O (3500-3000 cm(-1)) and subordinately CO2 both gaseous and liquid (1386 cm(-1) and 1281 cm(-1)). Mineral inclusions are mainly represented by hematite with marker bands at 1321, 413, 293 and 227 cm(-1), subordinately quartz. Amethyst crystallized from medium- to low-temperature silica fluids (191-445 degrees C, 64-131 MPa) containing some amounts of CO2 and Fe at hydrothermal stage of post magmatic activity in Boudi (Morocco). Its possible depth of formation was calculated to be ca. 2.8-5.7 km.
