Atomistic insights into formation mechanism of impact-induced augite glass from Chang'e-5 lunar regolith
Rattachement africain : cn. Niveau de preuve : code pays fourni par la source.
Le résumé fourni par la source
Impact is one of the most crucial geological processes on the lunar surface. As the main mafic mineral in lunar mare basalts, pyroxene can be transformed into an amorphous phase under the high-temperature and high-pressure conditions triggered by impact events. However, the formation mechanism of impact-induced pyroxene glass and its implications for the impact history of the lunar surface have yet to be elicited. In this study, we investigated the formation mechanism of augite glass from a Chang'e-5 breccia using the electron pair distribution function and molecular dynamics simulations. The results show that the augite transformed into dense melt under the high-temperature and high-pressure conditions induced by impact, with subsequent quenching leading to glass formation. Atomic structural analysis indicates that the augite dense melt solidified at a temperature of approximately 4100 K and a residual pressure of about 10 GPa. The mosaicization of this augite glass in the breccia clasts indicates that it had experienced a later impact event with a shock intensity of M-S2 after its formation. By establishing the link between the atomic structure of augite glass and its formation pressure-temperature conditions, this study provides a robust method for inverting impact parameters from natural lunar glass samples. It also offers a new perspective for deciphering the multi-stage impact history of the lunar surface and the evolutionary processes of lunar regolith, and holds universal reference value for studies of impact processes on the Moon and other terrestrial planets.
Ce résumé expose les affirmations des auteurs. BNTIC ne l’interprète pas comme une validation indépendante des résultats.
Le contrôle bibliographique ouvert
DOI retrouvé dans Crossref DOI retrouvé ; titre concordant.
- Titre Crossref
- Atomistic insights into formation mechanism of impact-induced augite glass from Chang'e-5 lunar regolith
- Date Crossref
- 01/11/2026
- Éditeur
- Elsevier BV
- Type
- journal-article
Ce recoupement confirme des métadonnées liées au DOI. Il ne confirme ni la méthode ni les conclusions de l’étude, et il ne compte pas comme une seconde source scientifique indépendante.
Où se fait cette recherche
-
Chinese Academy of Sciences pays non établi dans la noticeOrganisme public
-
Guangzhou Institute of Geochemistry Center for Advanced Planetary Science pays non établi dans la noticeStructure de recherche
-
Guangzhou Institute of Energy Conversion pays non établi dans la noticeStructure de recherche
-
University of Chinese Academy of Sciences pays non établi dans la noticeUniversité ou école supérieure
-
Guangdong Provincial Key Laboratory of Mineral Physics and Materials pays non établi dans la noticeStructure de recherche
-
State Key Laboratory of Deep Earth Processes and Resources pays non établi dans la noticeStructure de recherche
Chinese Academy of Sciences, Center for Advanced Planetary Science — Guangzhou Institute of Geochemistry et Guangzhou Institute of Energy Conversion, avec 3 autres affiliations.
Une affiliation ne permet pas de déduire la nationalité d’un auteur.