Valence/Spin States of Iron in Peridotite Glass to Megabar Pressure Implications for Dense Iron‐Rich Silicate Melt at the Bottom of the Mantle
Abstract We have conducted high‐pressure electrical conductivity and Mössbauer spectroscopic measurements of peridotite glass as an analog of silicate melts. We observed the shoulder feature in the Mössbauer spectra above 60 GPa due to the emergence of the new Fe2+ component, which could be associat...
Saved in:
| Main Authors: | , , , , , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
Wiley
2025-04-01
|
| Series: | Geophysical Research Letters |
| Subjects: | |
| Online Access: | https://doi.org/10.1029/2024GL113106 |
| Tags: |
Add Tag
No Tags, Be the first to tag this record!
|
| _version_ | 1850136926050320384 |
|---|---|
| author | Izumi Mashino Takashi Yoshino Takaya Mitsui Kosuke Fujiwara Sayako Inoué Takeshi Sakai |
| author_facet | Izumi Mashino Takashi Yoshino Takaya Mitsui Kosuke Fujiwara Sayako Inoué Takeshi Sakai |
| author_sort | Izumi Mashino |
| collection | DOAJ |
| description | Abstract We have conducted high‐pressure electrical conductivity and Mössbauer spectroscopic measurements of peridotite glass as an analog of silicate melts. We observed the shoulder feature in the Mössbauer spectra above 60 GPa due to the emergence of the new Fe2+ component, which could be associated with the change of the iron partitioning coefficient between solid and melt observed in previous melting experiments. The change in the trend of the electrical conductivity profile has been observed at around ∼83 GPa, suggesting the increase of the relative abundance of the new component. The pressure dependence of hyperfine parameters indicates the spin transitions of both Fe2+ and Fe3+ occur above 100 GPa, which is likely related to the structural change of the glass. Our results suggest that the spin state changes of iron lead to further densification of the silicate melts at the bottom of the mantle. |
| format | Article |
| id | doaj-art-ca82dffa9eb6485d9ee63ed2402c99cd |
| institution | OA Journals |
| issn | 0094-8276 1944-8007 |
| language | English |
| publishDate | 2025-04-01 |
| publisher | Wiley |
| record_format | Article |
| series | Geophysical Research Letters |
| spelling | doaj-art-ca82dffa9eb6485d9ee63ed2402c99cd2025-08-20T02:30:59ZengWileyGeophysical Research Letters0094-82761944-80072025-04-01527n/an/a10.1029/2024GL113106Valence/Spin States of Iron in Peridotite Glass to Megabar Pressure Implications for Dense Iron‐Rich Silicate Melt at the Bottom of the MantleIzumi Mashino0Takashi Yoshino1Takaya Mitsui2Kosuke Fujiwara3Sayako Inoué4Takeshi Sakai5Institute for Planetary Materials Okayama University Misasa JapanInstitute for Planetary Materials Okayama University Misasa JapanSynchrotron Radiation Research Center Kansai Institute for Photon Science National Institutes for Quantum Science and Technology Sayo JapanSynchrotron Radiation Research Center Kansai Institute for Photon Science National Institutes for Quantum Science and Technology Sayo JapanGeodynamics Research Center Ehime University Matsuyama JapanGeodynamics Research Center Ehime University Matsuyama JapanAbstract We have conducted high‐pressure electrical conductivity and Mössbauer spectroscopic measurements of peridotite glass as an analog of silicate melts. We observed the shoulder feature in the Mössbauer spectra above 60 GPa due to the emergence of the new Fe2+ component, which could be associated with the change of the iron partitioning coefficient between solid and melt observed in previous melting experiments. The change in the trend of the electrical conductivity profile has been observed at around ∼83 GPa, suggesting the increase of the relative abundance of the new component. The pressure dependence of hyperfine parameters indicates the spin transitions of both Fe2+ and Fe3+ occur above 100 GPa, which is likely related to the structural change of the glass. Our results suggest that the spin state changes of iron lead to further densification of the silicate melts at the bottom of the mantle.https://doi.org/10.1029/2024GL113106peridotite glasshigh pressureelectrical conductivityMössbauer spectroscopy |
| spellingShingle | Izumi Mashino Takashi Yoshino Takaya Mitsui Kosuke Fujiwara Sayako Inoué Takeshi Sakai Valence/Spin States of Iron in Peridotite Glass to Megabar Pressure Implications for Dense Iron‐Rich Silicate Melt at the Bottom of the Mantle Geophysical Research Letters peridotite glass high pressure electrical conductivity Mössbauer spectroscopy |
| title | Valence/Spin States of Iron in Peridotite Glass to Megabar Pressure Implications for Dense Iron‐Rich Silicate Melt at the Bottom of the Mantle |
| title_full | Valence/Spin States of Iron in Peridotite Glass to Megabar Pressure Implications for Dense Iron‐Rich Silicate Melt at the Bottom of the Mantle |
| title_fullStr | Valence/Spin States of Iron in Peridotite Glass to Megabar Pressure Implications for Dense Iron‐Rich Silicate Melt at the Bottom of the Mantle |
| title_full_unstemmed | Valence/Spin States of Iron in Peridotite Glass to Megabar Pressure Implications for Dense Iron‐Rich Silicate Melt at the Bottom of the Mantle |
| title_short | Valence/Spin States of Iron in Peridotite Glass to Megabar Pressure Implications for Dense Iron‐Rich Silicate Melt at the Bottom of the Mantle |
| title_sort | valence spin states of iron in peridotite glass to megabar pressure implications for dense iron rich silicate melt at the bottom of the mantle |
| topic | peridotite glass high pressure electrical conductivity Mössbauer spectroscopy |
| url | https://doi.org/10.1029/2024GL113106 |
| work_keys_str_mv | AT izumimashino valencespinstatesofironinperidotiteglasstomegabarpressureimplicationsfordenseironrichsilicatemeltatthebottomofthemantle AT takashiyoshino valencespinstatesofironinperidotiteglasstomegabarpressureimplicationsfordenseironrichsilicatemeltatthebottomofthemantle AT takayamitsui valencespinstatesofironinperidotiteglasstomegabarpressureimplicationsfordenseironrichsilicatemeltatthebottomofthemantle AT kosukefujiwara valencespinstatesofironinperidotiteglasstomegabarpressureimplicationsfordenseironrichsilicatemeltatthebottomofthemantle AT sayakoinoue valencespinstatesofironinperidotiteglasstomegabarpressureimplicationsfordenseironrichsilicatemeltatthebottomofthemantle AT takeshisakai valencespinstatesofironinperidotiteglasstomegabarpressureimplicationsfordenseironrichsilicatemeltatthebottomofthemantle |