Iodine speciation in basaltic melts at depth
The speciation of iodine in basalts has been investigated by combining in situ X-ray diffraction at high pressures and temperatures up to 4.9 GPa and 1600 °C, and Raman spectroscopy on recovered high pressure glasses at ambient conditions. Both methods point to iodine being oxidized in basalts, whet...
Saved in:
| Main Authors: | , , , , , , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
Académie des sciences
2024-12-01
|
| Series: | Comptes Rendus. Géoscience |
| Subjects: | |
| Online Access: | https://comptes-rendus.academie-sciences.fr/geoscience/articles/10.5802/crgeos.279/ |
| Tags: |
Add Tag
No Tags, Be the first to tag this record!
|
| _version_ | 1825206313149267968 |
|---|---|
| author | Sanloup, Chrystèle Leroy, Clémence Cochain, Benjamin Grützner, Tobias Chen, Qi Kono, Yoshio Shen, Guoyin |
| author_facet | Sanloup, Chrystèle Leroy, Clémence Cochain, Benjamin Grützner, Tobias Chen, Qi Kono, Yoshio Shen, Guoyin |
| author_sort | Sanloup, Chrystèle |
| collection | DOAJ |
| description | The speciation of iodine in basalts has been investigated by combining in situ X-ray diffraction at high pressures and temperatures up to 4.9 GPa and 1600 °C, and Raman spectroscopy on recovered high pressure glasses at ambient conditions. Both methods point to iodine being oxidized in basalts, whether molten or quenched as glasses. Observed interatomic distances and Raman vibrational modes are consistent with iodine being dissolved as complex iodate groups alike polyiodates or periodates, not as $\mathrm{IO}_3^-$ groups. Iodine speciation in basalts therefore seems to reflect a trend amongst halogens, with lighter chlorine bonding to network modifying cations, and bromine changing affinity from network modifying cations to oxygen anions under pressure. In the absence of a fluid aqueous phase, iodine could thus reach the Earth’s surface in basaltic magmas as an oxide, not as a reduced species. |
| format | Article |
| id | doaj-art-8299f9d5e13248c39e90795cfcbb862a |
| institution | Kabale University |
| issn | 1778-7025 |
| language | English |
| publishDate | 2024-12-01 |
| publisher | Académie des sciences |
| record_format | Article |
| series | Comptes Rendus. Géoscience |
| spelling | doaj-art-8299f9d5e13248c39e90795cfcbb862a2025-02-07T10:41:28ZengAcadémie des sciencesComptes Rendus. Géoscience1778-70252024-12-01356S1233310.5802/crgeos.27910.5802/crgeos.279Iodine speciation in basaltic melts at depthSanloup, Chrystèle0https://orcid.org/0000-0003-2412-6073Leroy, Clémence1Cochain, Benjamin2Grützner, Tobias3https://orcid.org/0000-0003-1876-3367 Chen, Qi4Kono, Yoshio5https://orcid.org/0000-0001-5916-7524Shen, Guoyin6https://orcid.org/0000-0001-5146-1147Institut Universitaire de France (IUF), Paris, France; Institut de minéralogie, physique des matériaux et cosmochimie, Sorbonne Université, CNRS, 4 Place Jussieu, FranceInstitut de minéralogie, physique des matériaux et cosmochimie, Sorbonne Université, CNRS, 4 Place Jussieu, FranceInstitut de minéralogie, physique des matériaux et cosmochimie, Sorbonne Université, CNRS, 4 Place Jussieu, Paris, FranceInstitut für Geowissenschaften, Goethe-Universität Frankfurt, GermanyDepartment of Earth Science & Environmental Change, University of Illinois at Urbana Champaign, Urbana, IL, USADepartment of Physics and Astronomy, Kwansei Gakuin University, Sanda, JapanHPCAT, X-ray Science Division, Argonne National Laboratory, Argonne, USAThe speciation of iodine in basalts has been investigated by combining in situ X-ray diffraction at high pressures and temperatures up to 4.9 GPa and 1600 °C, and Raman spectroscopy on recovered high pressure glasses at ambient conditions. Both methods point to iodine being oxidized in basalts, whether molten or quenched as glasses. Observed interatomic distances and Raman vibrational modes are consistent with iodine being dissolved as complex iodate groups alike polyiodates or periodates, not as $\mathrm{IO}_3^-$ groups. Iodine speciation in basalts therefore seems to reflect a trend amongst halogens, with lighter chlorine bonding to network modifying cations, and bromine changing affinity from network modifying cations to oxygen anions under pressure. In the absence of a fluid aqueous phase, iodine could thus reach the Earth’s surface in basaltic magmas as an oxide, not as a reduced species.https://comptes-rendus.academie-sciences.fr/geoscience/articles/10.5802/crgeos.279/IodineBasaltHigh pressure |
| spellingShingle | Sanloup, Chrystèle Leroy, Clémence Cochain, Benjamin Grützner, Tobias Chen, Qi Kono, Yoshio Shen, Guoyin Iodine speciation in basaltic melts at depth Comptes Rendus. Géoscience Iodine Basalt High pressure |
| title | Iodine speciation in basaltic melts at depth |
| title_full | Iodine speciation in basaltic melts at depth |
| title_fullStr | Iodine speciation in basaltic melts at depth |
| title_full_unstemmed | Iodine speciation in basaltic melts at depth |
| title_short | Iodine speciation in basaltic melts at depth |
| title_sort | iodine speciation in basaltic melts at depth |
| topic | Iodine Basalt High pressure |
| url | https://comptes-rendus.academie-sciences.fr/geoscience/articles/10.5802/crgeos.279/ |
| work_keys_str_mv | AT sanloupchrystele iodinespeciationinbasalticmeltsatdepth AT leroyclemence iodinespeciationinbasalticmeltsatdepth AT cochainbenjamin iodinespeciationinbasalticmeltsatdepth AT grutznertobias iodinespeciationinbasalticmeltsatdepth AT chenqi iodinespeciationinbasalticmeltsatdepth AT konoyoshio iodinespeciationinbasalticmeltsatdepth AT shenguoyin iodinespeciationinbasalticmeltsatdepth |