{"title":"在嫦娥五号样品中分别观测到辐照和撞击对月球金属铁形成的影响","authors":"Laiquan Shen, Rui Zhao, Chao Chang, Jihao Yu, Dongdong Xiao, Haiyang Bai, Zhigang Zou, Mengfei Yang, Weihua Wang","doi":"10.1038/s41550-024-02300-0","DOIUrl":null,"url":null,"abstract":"Nanophase iron particles (npFe0) are generated on the surface of airless bodies by space weathering and can alter surficial optical properties substantially. However, the details of their formation pathways are still unclear. Here we use impact glasses returned from the Moon by Chang’e-5 to distinguish the relative contributions of solar wind irradiation and (micro)meteorites impacts to the production of different-sized npFe0. We show that solar wind irradiation can solely produce small npFe0, via implantation of solar wind ions into the topmost grain surfaces. On the other hand, (micro)meteorite impacts produce directly large npFe0 in melts, through impact-triggered disproportionation reaction or thermal decomposition. These nanoparticles are also capable to further coalesce into micrometre-sized Fe0 particles during impacts. These findings can help in predicting the space-weathering behaviour of regions exposed to different space environments. A lunar glass bead can preserve nanophase iron (npFe0) of varying sizes via multiple mechanisms. The formation of small and large npFe0 with distinct weathering effects is independently governed by solar wind irradiation and micrometeorite impacts.","PeriodicalId":18778,"journal":{"name":"Nature Astronomy","volume":null,"pages":null},"PeriodicalIF":12.9000,"publicationDate":"2024-06-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":"{\"title\":\"Separate effects of irradiation and impacts on lunar metallic iron formation observed in Chang’e-5 samples\",\"authors\":\"Laiquan Shen, Rui Zhao, Chao Chang, Jihao Yu, Dongdong Xiao, Haiyang Bai, Zhigang Zou, Mengfei Yang, Weihua Wang\",\"doi\":\"10.1038/s41550-024-02300-0\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"Nanophase iron particles (npFe0) are generated on the surface of airless bodies by space weathering and can alter surficial optical properties substantially. However, the details of their formation pathways are still unclear. Here we use impact glasses returned from the Moon by Chang’e-5 to distinguish the relative contributions of solar wind irradiation and (micro)meteorites impacts to the production of different-sized npFe0. We show that solar wind irradiation can solely produce small npFe0, via implantation of solar wind ions into the topmost grain surfaces. On the other hand, (micro)meteorite impacts produce directly large npFe0 in melts, through impact-triggered disproportionation reaction or thermal decomposition. These nanoparticles are also capable to further coalesce into micrometre-sized Fe0 particles during impacts. These findings can help in predicting the space-weathering behaviour of regions exposed to different space environments. A lunar glass bead can preserve nanophase iron (npFe0) of varying sizes via multiple mechanisms. The formation of small and large npFe0 with distinct weathering effects is independently governed by solar wind irradiation and micrometeorite impacts.\",\"PeriodicalId\":18778,\"journal\":{\"name\":\"Nature Astronomy\",\"volume\":null,\"pages\":null},\"PeriodicalIF\":12.9000,\"publicationDate\":\"2024-06-20\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"\",\"citationCount\":\"0\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"Nature Astronomy\",\"FirstCategoryId\":\"101\",\"ListUrlMain\":\"https://www.nature.com/articles/s41550-024-02300-0\",\"RegionNum\":1,\"RegionCategory\":\"物理与天体物理\",\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"\",\"PubModel\":\"\",\"JCR\":\"Q1\",\"JCRName\":\"ASTRONOMY & ASTROPHYSICS\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"Nature Astronomy","FirstCategoryId":"101","ListUrlMain":"https://www.nature.com/articles/s41550-024-02300-0","RegionNum":1,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q1","JCRName":"ASTRONOMY & ASTROPHYSICS","Score":null,"Total":0}
Separate effects of irradiation and impacts on lunar metallic iron formation observed in Chang’e-5 samples
Nanophase iron particles (npFe0) are generated on the surface of airless bodies by space weathering and can alter surficial optical properties substantially. However, the details of their formation pathways are still unclear. Here we use impact glasses returned from the Moon by Chang’e-5 to distinguish the relative contributions of solar wind irradiation and (micro)meteorites impacts to the production of different-sized npFe0. We show that solar wind irradiation can solely produce small npFe0, via implantation of solar wind ions into the topmost grain surfaces. On the other hand, (micro)meteorite impacts produce directly large npFe0 in melts, through impact-triggered disproportionation reaction or thermal decomposition. These nanoparticles are also capable to further coalesce into micrometre-sized Fe0 particles during impacts. These findings can help in predicting the space-weathering behaviour of regions exposed to different space environments. A lunar glass bead can preserve nanophase iron (npFe0) of varying sizes via multiple mechanisms. The formation of small and large npFe0 with distinct weathering effects is independently governed by solar wind irradiation and micrometeorite impacts.
Nature AstronomyPhysics and Astronomy-Astronomy and Astrophysics
CiteScore
19.50
自引率
2.80%
发文量
252
期刊介绍:
Nature Astronomy, the oldest science, has played a significant role in the history of Nature. Throughout the years, pioneering discoveries such as the first quasar, exoplanet, and understanding of spiral nebulae have been reported in the journal. With the introduction of Nature Astronomy, the field now receives expanded coverage, welcoming research in astronomy, astrophysics, and planetary science. The primary objective is to encourage closer collaboration among researchers in these related areas.
Similar to other journals under the Nature brand, Nature Astronomy boasts a devoted team of professional editors, ensuring fairness and rigorous peer-review processes. The journal maintains high standards in copy-editing and production, ensuring timely publication and editorial independence.
In addition to original research, Nature Astronomy publishes a wide range of content, including Comments, Reviews, News and Views, Features, and Correspondence. This diverse collection covers various disciplines within astronomy and includes contributions from a diverse range of voices.