New Occurrence of Seifertite and Stishovite in Chang’E‐5 Regolith
Abstract High‐pressure minerals in impact ejecta quantify shock conditions and provide clues for provenance analysis. The sampling site of Chang’E‐5 may contain distal ejecta, which is critical for constraining the impact events and interpreting the constitution of the target geological units. Here,...
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| Main Authors: | , , , , , |
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| Format: | Article |
| Language: | English |
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Wiley
2022-06-01
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| Series: | Geophysical Research Letters |
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| Online Access: | https://doi.org/10.1029/2022GL098722 |
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| _version_ | 1832591206029197312 |
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| author | Runlian Pang Jing Yang Wei Du Aicheng Zhang Shirong Liu Rui Li |
| author_facet | Runlian Pang Jing Yang Wei Du Aicheng Zhang Shirong Liu Rui Li |
| author_sort | Runlian Pang |
| collection | DOAJ |
| description | Abstract High‐pressure minerals in impact ejecta quantify shock conditions and provide clues for provenance analysis. The sampling site of Chang’E‐5 may contain distal ejecta, which is critical for constraining the impact events and interpreting the constitution of the target geological units. Here, we report a silica fragment consisting of seifertite, stishovite, α‐cristobalite‐like phase, and silica glass in Chang’E‐5 regolith. Both seifertite and stishovite formed via solid‐state transformation mechanism, in which seifertite formed by transition from α‐cristobalite upon pressure loading whereas stishovite may form from seifertite when postshock temperature was significant during pressure release. The coexistence of seifertite and stishovite suggests that their host rock has experienced a peak shock pressure of 11–40 GPa and records different stages of the impact process. Crater size calculation revealed that the host rock of stishovite and seifertite could have been transported from distant craters, confirming the retention of distal ejecta in Chang’E‐5 landing site. |
| format | Article |
| id | doaj-art-008b1517defc4bbfb9158c2b8e739b5f |
| institution | Kabale University |
| issn | 0094-8276 1944-8007 |
| language | English |
| publishDate | 2022-06-01 |
| publisher | Wiley |
| record_format | Article |
| series | Geophysical Research Letters |
| spelling | doaj-art-008b1517defc4bbfb9158c2b8e739b5f2025-01-22T14:38:16ZengWileyGeophysical Research Letters0094-82761944-80072022-06-014912n/an/a10.1029/2022GL098722New Occurrence of Seifertite and Stishovite in Chang’E‐5 RegolithRunlian Pang0Jing Yang1Wei Du2Aicheng Zhang3Shirong Liu4Rui Li5State Key Laboratory of Ore Deposit Geochemistry Institute of Geochemistry Chinese Academy of Sciences Guiyang ChinaCenter for Lunar and Planetary Sciences Institute of Geochemistry Chinese Academy of Sciences Guiyang ChinaState Key Laboratory of Ore Deposit Geochemistry Institute of Geochemistry Chinese Academy of Sciences Guiyang ChinaCenter for Excellence in Comparative Planetology Chinese Academy of Sciences Hefei ChinaState Key Laboratory of Environmental Geochemistry Institute of Geochemistry Chinese Academy of Sciences Guiyang ChinaCenter for Lunar and Planetary Sciences Institute of Geochemistry Chinese Academy of Sciences Guiyang ChinaAbstract High‐pressure minerals in impact ejecta quantify shock conditions and provide clues for provenance analysis. The sampling site of Chang’E‐5 may contain distal ejecta, which is critical for constraining the impact events and interpreting the constitution of the target geological units. Here, we report a silica fragment consisting of seifertite, stishovite, α‐cristobalite‐like phase, and silica glass in Chang’E‐5 regolith. Both seifertite and stishovite formed via solid‐state transformation mechanism, in which seifertite formed by transition from α‐cristobalite upon pressure loading whereas stishovite may form from seifertite when postshock temperature was significant during pressure release. The coexistence of seifertite and stishovite suggests that their host rock has experienced a peak shock pressure of 11–40 GPa and records different stages of the impact process. Crater size calculation revealed that the host rock of stishovite and seifertite could have been transported from distant craters, confirming the retention of distal ejecta in Chang’E‐5 landing site.https://doi.org/10.1029/2022GL098722Chang'E‐5lunar sampleimpact ejectaseifertitestishovite |
| spellingShingle | Runlian Pang Jing Yang Wei Du Aicheng Zhang Shirong Liu Rui Li New Occurrence of Seifertite and Stishovite in Chang’E‐5 Regolith Geophysical Research Letters Chang'E‐5 lunar sample impact ejecta seifertite stishovite |
| title | New Occurrence of Seifertite and Stishovite in Chang’E‐5 Regolith |
| title_full | New Occurrence of Seifertite and Stishovite in Chang’E‐5 Regolith |
| title_fullStr | New Occurrence of Seifertite and Stishovite in Chang’E‐5 Regolith |
| title_full_unstemmed | New Occurrence of Seifertite and Stishovite in Chang’E‐5 Regolith |
| title_short | New Occurrence of Seifertite and Stishovite in Chang’E‐5 Regolith |
| title_sort | new occurrence of seifertite and stishovite in chang e 5 regolith |
| topic | Chang'E‐5 lunar sample impact ejecta seifertite stishovite |
| url | https://doi.org/10.1029/2022GL098722 |
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