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「新手礼遇」开盒即得惊喜奖励
详细信息
- 软件大小:668.97MB
- 最后更新:2026-08-07 20:40:12
- 最新版本:V1.6.15
- 文件格式:apk
- 应用分类:1111
- 使用语言:中文
- 联网要求:需要联网
- 系统要求:12.92以上
应用介绍
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三,adddddd,aaa
四,aaa,aaaaaaaa
五,adddddd,1111
六,adddddd,aaaaaaaa
七,aaa
【联系我们】
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中新社武汉8月7日电 (记者 马芙蓉)记者7日从中国地质大学(武汉)获悉,该校地球与行星科学学院肖龙教授团队联合香港大学、澳门科技大学等高校学者,重建了嫦娥五号着陆区月壤完整演化历史,为后续月球探测与资源开发提供直接支撑。
相关成果于近日发表于国际期刊《空间科学与技术(英文)》(Space: Science & Technology)。
此项研究中,团队构建了嫦娥五号着陆点表层至65厘米深度的月壤成熟度剖面,结合月壤成熟度分层特征、暴露年龄实测数据以及雷达探测的分层结构信息,重建了嫦娥五号着陆区月壤完整演化历史。
据肖龙介绍,约20.3亿年前,月球上一次大规模玄武岩岩浆喷发,形成坚硬、完整的玄武岩基岩,成为后来月壤的物质源头。而后,在约20亿年前—2.4亿年前,太阳系内的小型天体撞击事件持续不断,大量小型陨石、微陨石持续轰击,让这些基岩破碎,形成颗粒度小但厚度可观的初始月壤层。
肖龙说,随着撞击频率逐步降低,月表地貌格局逐渐稳定,陨石撞击减弱,转化为太阳风、宇宙射线和微陨石(微米粒径)为主的对月壤表层的改造阶段。经过分层演化,最终形成嫦娥五号采样时探测到的三层结构:顶部0厘米至3厘米、受到较充分混合改造的成熟度相对较高的月壤层;中部3厘米至23厘米、仅经历原位改造的成熟度中等的月壤层;底部23厘米至65厘米、几乎未受扰动的、成熟度极低的原始月壤层。
研究团队发现,不同深度月壤的成熟度差异,不是简单由月表风化作用随着深度增加递减导致,而是在撞击沉积、空间风化作用双重叠加下,经历了“顶部太空风化主导、中部原位传导改造、下部封闭保存”的不同演化过程。这一发现修正了此前业内“月壤成熟度随深度增加线性递减”的认知。
“研究数据也为后续月球探测任务提供了关键工程设计参数。”肖龙说,研究证实,在嫦娥五号着陆区,能够将月壤彻底翻搅并带来新鲜碎屑的撞击作用,其影响深度仅局限在23厘米以内,是获取近期微陨石和太阳风等作用的最佳样品。未来采样任务中,若目标是获取最原始月壤样品,研究过去的地质和太空环境历史,将采样深度设定在23厘米以下,或可规避太空风化干扰,获取最有科学价值的样品。(完)
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