Water solubility in trachytic and pantelleritic melts: an experimental study
Solubility experiments were performed on a trachyte and a pantellerite from Pantelleria. The trachyte has $\mathrm{SiO}_{2}=65.2$ wt%, $\mathrm{Al}_{2}\mathrm{O}_{3}=15.2$ wt% and a peralkaline index $(\mathrm{P.I.} = \mathrm{molar}[(\mathrm{Na}_{2}\mathrm{O}+ \mathrm{K}_{2}\mathrm{O})/\mathrm{Al}_{...
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| Format: | Article |
| Language: | English |
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Académie des sciences
2021-09-01
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| Series: | Comptes Rendus. Géoscience |
| Subjects: | |
| Online Access: | https://comptes-rendus.academie-sciences.fr/geoscience/articles/10.5802/crgeos.75/ |
| _version_ | 1797651322940424192 |
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| author | Romano, Pierangelo Di Carlo, Ida Andújar, Joan Rotolo, Silvio G. |
| author_facet | Romano, Pierangelo Di Carlo, Ida Andújar, Joan Rotolo, Silvio G. |
| author_sort | Romano, Pierangelo |
| collection | DOAJ |
| description | Solubility experiments were performed on a trachyte and a pantellerite from Pantelleria. The trachyte has $\mathrm{SiO}_{2}=65.2$ wt%, $\mathrm{Al}_{2}\mathrm{O}_{3}=15.2$ wt% and a peralkaline index $(\mathrm{P.I.} = \mathrm{molar}[(\mathrm{Na}_{2}\mathrm{O}+ \mathrm{K}_{2}\mathrm{O})/\mathrm{Al}_{2}\mathrm{O}_{3}]) \sim 1$ while the pantellerite has $\mathrm{SiO}_{2}=72.2$ wt%, $\mathrm{Al}_{2}\mathrm{O}_{3}=11$ wt% and a $\mathrm{P.I.}=1.3$. Solubility experiments were performed in the pressure range of 50–300 MPa at ${T}=950~\text{°C}$ for the trachyte and 50–200 MPa at ${T}=850~\text{°C}$ for the pantellerite. The water content of experimental glasses was determined by Karl Fischer titration, elemental analyser and FT–IR spectroscopy. Water content appears similar in both compositions for analogous pressure conditions, varying from ${\sim }2.5$ wt% at 50 MPa to ${\sim }5.8$ at 200 MPa. Comparison of the experimental data with the thermodynamic models shows that the empirical model of Moore et al. [1998] better matches the experimental data for both compositions, while the thermodynamic models of Papale et al. [2006] and Ghiorso and Gualda [2015] tend to overestimate melt water content, probably due to the paucity of peralkaline melt compositions used for calibration. One inference of these new solubility data is on MI-derived depth of felsic reservoirs at Pantelleria which deepens from 2.4 to 3.5 km. |
| first_indexed | 2024-03-11T16:14:20Z |
| format | Article |
| id | doaj.art-8dea7035e13d415184cdc012eb2ebaad |
| institution | Directory Open Access Journal |
| issn | 1778-7025 |
| language | English |
| last_indexed | 2024-03-11T16:14:20Z |
| publishDate | 2021-09-01 |
| publisher | Académie des sciences |
| record_format | Article |
| series | Comptes Rendus. Géoscience |
| spelling | doaj.art-8dea7035e13d415184cdc012eb2ebaad2023-10-24T14:24:21ZengAcadémie des sciencesComptes Rendus. Géoscience1778-70252021-09-01353S231533110.5802/crgeos.7510.5802/crgeos.75Water solubility in trachytic and pantelleritic melts: an experimental studyRomano, Pierangelo0https://orcid.org/0000-0002-4223-2120Di Carlo, Ida1Andújar, Joan2Rotolo, Silvio G.3Dipartimento di Scienze della Terra e del Mare (DiSTeM), Università degli Studi di Palermo, Via Archirafi 22, 90123 Palermo, Italy; Istituto Nazionale di Geofisca e Vulcanologia, sezione di Palermo, Via Ugo la Malfa 153, 90146 Palermo, ItalyInstitut des Sciences de la Terre d’Orléans (ISTO) UMR 7327, Université d’Orléans – CNRS – BRGM, Campus Géosciences, 1A rue de la Férollerie, 45071 Orleans Cedex 2, FranceInstitut des Sciences de la Terre d’Orléans (ISTO) UMR 7327, Université d’Orléans – CNRS – BRGM, Campus Géosciences, 1A rue de la Férollerie, 45071 Orleans Cedex 2, FranceDipartimento di Scienze della Terra e del Mare (DiSTeM), Università degli Studi di Palermo, Via Archirafi 22, 90123 Palermo, Italy; Istituto Nazionale di Geofisca e Vulcanologia, sezione di Palermo, Via Ugo la Malfa 153, 90146 Palermo, ItalySolubility experiments were performed on a trachyte and a pantellerite from Pantelleria. The trachyte has $\mathrm{SiO}_{2}=65.2$ wt%, $\mathrm{Al}_{2}\mathrm{O}_{3}=15.2$ wt% and a peralkaline index $(\mathrm{P.I.} = \mathrm{molar}[(\mathrm{Na}_{2}\mathrm{O}+ \mathrm{K}_{2}\mathrm{O})/\mathrm{Al}_{2}\mathrm{O}_{3}]) \sim 1$ while the pantellerite has $\mathrm{SiO}_{2}=72.2$ wt%, $\mathrm{Al}_{2}\mathrm{O}_{3}=11$ wt% and a $\mathrm{P.I.}=1.3$. Solubility experiments were performed in the pressure range of 50–300 MPa at ${T}=950~\text{°C}$ for the trachyte and 50–200 MPa at ${T}=850~\text{°C}$ for the pantellerite. The water content of experimental glasses was determined by Karl Fischer titration, elemental analyser and FT–IR spectroscopy. Water content appears similar in both compositions for analogous pressure conditions, varying from ${\sim }2.5$ wt% at 50 MPa to ${\sim }5.8$ at 200 MPa. Comparison of the experimental data with the thermodynamic models shows that the empirical model of Moore et al. [1998] better matches the experimental data for both compositions, while the thermodynamic models of Papale et al. [2006] and Ghiorso and Gualda [2015] tend to overestimate melt water content, probably due to the paucity of peralkaline melt compositions used for calibration. One inference of these new solubility data is on MI-derived depth of felsic reservoirs at Pantelleria which deepens from 2.4 to 3.5 km.https://comptes-rendus.academie-sciences.fr/geoscience/articles/10.5802/crgeos.75/Alkaline magmasTrachytePantelleriteWater solubilityExperimentsAlkaline magmas |
| spellingShingle | Romano, Pierangelo Di Carlo, Ida Andújar, Joan Rotolo, Silvio G. Water solubility in trachytic and pantelleritic melts: an experimental study Comptes Rendus. Géoscience Alkaline magmas Trachyte Pantellerite Water solubility Experiments Alkaline magmas |
| title | Water solubility in trachytic and pantelleritic melts: an experimental study |
| title_full | Water solubility in trachytic and pantelleritic melts: an experimental study |
| title_fullStr | Water solubility in trachytic and pantelleritic melts: an experimental study |
| title_full_unstemmed | Water solubility in trachytic and pantelleritic melts: an experimental study |
| title_short | Water solubility in trachytic and pantelleritic melts: an experimental study |
| title_sort | water solubility in trachytic and pantelleritic melts an experimental study |
| topic | Alkaline magmas Trachyte Pantellerite Water solubility Experiments Alkaline magmas |
| url | https://comptes-rendus.academie-sciences.fr/geoscience/articles/10.5802/crgeos.75/ |
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