本项研究成果相关示意图。中国科学院地质与地球物理研究所 供图 研究团队在实验室分析数据，进行交流。中国科学院地质与地球物理研究所 供图 北京1月13日电，月球早期的大型撞击事件是否及如何影响月球深部？月幔中等挥发性元素为何丢 失？作为地球的天然卫星和距离最近的天体，月球上这些悬而未决的谜题一直备受关注。 研究团队在实验室分析数据。中国科学院地质与地球物理研究所 供图 论文第一作者和通讯作者田恒次研究员表示，在本项研究中，研究团队对毫克级嫦娥六号玄武岩单 颗粒进行了高精度钾同位素分析，结果显示，与来自月球正面的阿波罗样品相比，嫦娥六号玄武岩具有 更高的钾-41/钾-39比值。 为追溯这一异常信号的根源，研究团队逐一检查了宇宙射线照射、岩浆过程等多种可能因素，最终 确认是撞击事件改变了月幔的钾同位素组成，造成钾的亏损与同位素升高。在撞击产生的瞬时高温高压 过程中，较轻的同位素(如钾-39)往往优先逃逸，导致残余物质中同位素比值升高。 田恒次指出，挥发性元素的丢失很可能会使背面的岩石更难熔，从而减少火山活动，这为理解月球 正背面不对称的地质演化历史提供了关键线索。 据研究团队介绍，小行星撞击是月球自形成以来最主要的 ...

本项研究 成果相关示意图。中国科学院地质与地球物理研究所 供图 中新网北京1月13日电 (记者 孙自法)月球早期的大型撞击事件是否及如何影响月球深部？月幔中等挥发 性元素为何丢失？作为地球的天然卫星和距离最近的天体，月球上这些悬而未决的谜题一直备受关注。 来自中国科学院地质与地球物理研究所的最新消息称，该所田恒次研究员团队最近通过对嫦娥六号采自 月球背面月壤样品的高精度钾同位素分析，首次发现月球南极-艾特肯盆地撞击事件导致月幔中等挥发 性元素丢失，这为理解大型撞击对月球演化的影响，以及破解月球二分性的成因等，提供了关键信息。 嫦娥六号月壤研究这项重要进展的成果论文，北京时间1月13日凌晨在国际学术期刊《美国国家科学院 院刊》上线发表。 论文第一作者和通讯作者田恒次研究员表示，在本项研究中，研究团队对毫克级嫦娥六号玄武岩单颗粒 进行了高精度钾同位素分析，结果显示，与来自月球正面的阿波罗样品相比，嫦娥六号玄武岩具有更高 的钾-41/钾-39比值。 田恒次指出，挥发性元素的丢失很可能会使背面的岩石更难熔，从而减少火山活动，这为理解月球正背 面不对称的地质演化历史提供了关键线索。 研究团队 在实验室分析数据，进行交流 ...

特别提示 微信机制调整，点击顶部"仪器信息网" → 右上方"…" → 设为 ★ 星标，否则很可能无法看到我们的推送。 基于 嫦娥六号月壤样品 ，中国科学院地质与地球物理研究所祁生文研究员团队系统揭示了月球背面月壤表现出较高黏性特征的物理机制，从 颗粒力学层面 完整阐释了嫦娥六号月壤"为什么这么黏"的科学谜题。相关研究成果已在线发表于国际学术期刊《自然·天文》。 科研团队对嫦娥六号返回样品进行了1微米的 高空间分辨CT扫描 ，通过对超过29万个月壤颗粒的尺寸与形态进行精确厘定，并同月球正面 嫦娥五号和阿波罗月壤对比，发现嫦娥六号月壤D60值最小，仅为48.4微米，颗粒更细，形态更复杂，整体球度显著偏低。祁生文研究员指 出："这一现象颇为反常。 通常颗粒越细，形状越接近球形；而嫦娥六号月壤虽细，形态却更复杂 。 "研究人员认为，这可能与样品中富含 易破碎的长石矿物（约占32.6%），以及月球背面经历更强太空风化作用有关。嫦娥六号月壤又细又粗糙的颗粒特性，提升了摩擦力、范德 华力与静电力的贡献，产生更高的休止角，造就了其更高黏性特征。 点击文末"阅读原文"查看详情 ↓ ↓ 加入行业讨论群 ↓ ↓ 该研究首次从颗粒力 ...

Core Insights - The article emphasizes the importance of enhancing independent innovation capabilities to seize the high ground in technological development and continuously generate new productive forces [1] Group 1: Lunar Exploration and Research - The Chang'e 6 mission successfully collected lunar soil samples from the Moon's far side, providing critical insights into the long-debated issue of lunar dichotomy, which refers to the significant differences between the Moon's near and far sides in terms of morphology, composition, and geological activity [2][3] - The research team discovered that the volcanic lava in the landing area of Chang'e 6 formed approximately 2.83 billion years ago, indicating that the far side of the Moon also experienced volcanic activity less than 3 billion years ago, which may be a key factor in understanding lunar dichotomy [3] - The team identified key information regarding the Moon's early impact history and determined the formation time of the Apollo Basin, providing crucial evidence for the late heavy bombardment of the Moon [3] Group 2: Future Research Directions - The research team plans to continue studying newly acquired lunar soil samples to address key questions regarding the differences between the Moon's near and far sides, aiming for further breakthroughs in understanding lunar evolution [4] - The team is committed to leveraging existing technological advancements to deepen lunar sample research, contributing to planetary science and deep space exploration [4] Group 3: Challenges in Lunar Soil Research - Lunar soil samples are extremely limited and precious, with Chang'e 6 returning only 1935.3 grams of lunar soil, which poses challenges for distribution among research institutions [6][7] - The unique lunar environment necessitates the development of optimized research methods for analyzing lunar soil samples, which requires high precision in instruments and significant technical expertise [6][7]

Core Insights - The article emphasizes the importance of enhancing independent innovation capabilities to seize the high ground in technological development and continuously generate new productive forces [1] Group 1: Research Achievements - The first batch of research results from the Chang'e 6 lunar sample was published in the journal "Science" on November 15, 2024, revealing that the volcanic lava in the landing area formed 2.83 billion years ago, indicating young magma activity on the moon's far side [2] - Key findings include insights into the moon's early impact history and the formation time of the Apollo Basin, providing critical evidence for understanding the late heavy bombardment of the moon [2] - The discovery of carbonaceous spherules in the lunar soil, which are rich in water and organic matter, offers new clues for exploring the sources of water on the moon's surface [2] Group 2: Future Research Directions - The team plans to continue research on the differences between the moon's near and far sides, leveraging existing technological advancements to deepen lunar sample studies [3] - The goal is to achieve further breakthroughs in understanding the moon's evolutionary history, contributing to planetary science and deep space exploration [3] Group 3: Challenges in Lunar Research - Lunar soil samples are extremely limited and precious, with Chang'e 6 returning only 1935.3 grams, and distribution among research institutions is strictly controlled [4] - Analyzing lunar samples requires optimized research methods due to the unique lunar environment, which poses high demands on instrument precision and technical accumulation [4] - A multidisciplinary team of over 30 researchers has been established to tackle these challenges and has already achieved significant results in the first batch of sample studies [4][5]

Core Insights - The research team identified impact residues from carbonaceous chondrites in lunar soil samples collected by the Chang'e 6 mission, enhancing understanding of planetary formation and evolution [1] Group 1: Research Findings - The study established a systematic method for identifying extraterrestrial samples containing meteoritic materials [1] - The identified fragments are believed to be products of carbonaceous chondrite parent bodies impacting the lunar surface, resulting in rapid cooling and crystallization after melting [1] Group 2: Implications - This research updates the understanding of material migration mechanisms within the inner solar system [1] - It provides new directions for future studies on the distribution and evolution of lunar water resources [1]

Core Insights - Chinese scientists have identified impact residues from CI carbonaceous chondrites in the 2-gram lunar soil samples from the Chang'e 6 mission, suggesting that previously detected water with positive oxygen isotopic characteristics in lunar samples may originate from these meteorite impacts [1][2] - The research was published in the Proceedings of the National Academy of Sciences (PNAS) on October 21, 2023, highlighting the significance of meteorites as messengers of the solar system and their role in studying planetary formation and evolution [1] Group 1 - The research team, led by Academician Xu Yigang from the Guangzhou Institute of Geochemistry, established a systematic method for identifying extraterrestrial meteorite materials in lunar samples [1] - CI carbonaceous chondrites, which are rich in water and organic materials essential for life, primarily originate from asteroids located in the outer solar system [1] - The findings indicate that materials from the outer solar system can migrate inward, providing important insights into the sources of water on the lunar surface [1][2]

Core Insights - The research from the Chang'e 6 lunar soil samples provides crucial clues about the origin of water on the Moon and confirms that asteroid fragments can travel from the outer solar system to the inner solar system [1][2] Group 1: Research Findings - A team led by Academician Xu Yigang and Researcher Lin Mang from the Guangzhou Institute of Geochemistry successfully identified impact remnants of CI-type carbonaceous chondrites in the Chang'e 6 lunar soil samples [2] - The study established a new method for effectively identifying extraterrestrial samples containing meteorite materials [2] - CI-type chondrites, which are rich in water and organic materials, are primarily found in the outer solar system, and their presence on the Moon is significantly higher than on Earth, suggesting that the contribution of carbonaceous chondrites to the Earth-Moon system may have been severely underestimated [2] Group 2: Implications - This discovery not only confirms the migration of materials from the outer solar system to the inner solar system but also updates the understanding of the mechanisms of material movement within the solar system [2] - The findings provide new directions for future research on the distribution and evolution of water resources on the Moon, indicating that previously detected water features in lunar samples may originate from impacts by these types of meteorites [2]

Core Insights - The research from China's Chang'e 6 lunar samples provides crucial clues about the origin of water on the Moon and the ability of outer solar system materials to travel to the inner solar system [1][2] Group 1: Research Findings - The team led by Academician Xu Yigang and Researcher Lin Mang from the Guangzhou Institute of Geochemistry successfully identified impact remnants of CI carbonaceous chondrites in the Chang'e 6 lunar samples [2] - The identified fragments are products formed from the melting and rapid cooling of the parent body of these chondrites after impacting the lunar surface [2] - A new method for effectively identifying extraterrestrial samples containing meteoritic materials was established [2] Group 2: Implications of Findings - CI chondrites, which are rich in water and organic materials, are primarily found in the outer solar system, and their presence on the Moon is significantly higher than on Earth [2] - This suggests that the contribution of carbonaceous chondrites to the Earth-Moon system may have been severely underestimated [2] - The findings confirm that materials from the outer solar system can migrate inward, providing new directions for future research on lunar water resources and their evolution [2]

Core Insights - Chinese scientists have identified impact residues from CI carbonaceous chondrites in lunar samples collected by Chang'e 6, suggesting that water detected in lunar samples may originate from these meteorite impacts [1][2] - The research was published in the Proceedings of the National Academy of Sciences (PNAS) on October 21, 2023, highlighting the significance of lunar samples as a natural archive for studying extraterrestrial materials [1] Group 1 - The study reveals that CI carbonaceous chondrites, which are rare on Earth, contribute to the understanding of planetary formation and evolution due to their preservation on the Moon [1] - The research team, led by Academician Xu Yigang from the Guangzhou Institute of Geochemistry, established a systematic method for identifying extraterrestrial materials in lunar samples [1] - The findings indicate that the remnants of CI chondrites are products of their parent bodies impacting the Moon's surface, melting, and then rapidly crystallizing [1] Group 2 - The discovery suggests that materials from the outer solar system can migrate to the inner solar system, providing insights into the sources of water on the Moon's surface [2] - This research opens new avenues for future studies on the distribution and evolution of lunar water resources [2]