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New advances in lunar soil research offer scientific evidence to unravel mystery of moon’s 'two faces'_我的网站

A |           　　本报8月25日讯 今天，中国民主同盟济南市第十三次代表大会完成各项议程并闭幕，中共济南市委常委、统战部部长张勇强出席会议并讲话。     　　会议听取并审议民盟济南市第十四届委员会工作报告。

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    Lunar soil Photo: IC
Chinese scientists have made new progress in the study of lunar soil samples returned by the Chang'e-6 mission, providing fresh evidence to the striking differences between the moon's near and far sides, which have long puzzled scientists.
Because the moon is tidally locked to Earth, its rotation period matches its orbital period, meaning the same side always faces Earth. The moon's near side features vast dark basaltic plains known as lunar maria, while its far side is dominated by bright highlands with far fewer maria, creating a striking contrast between the two sides. Why does the moon have such "two faces"?
Scientists studying the moon's early formation and evolution have long used the lunar magma ocean model as a basic framework. Under the model, the chemical and isotopic characteristics of different types of lunar magma can be explained by the mixing of different components in varying proportions after the magma ocean cooled, Guangming Daily reported on Saturday. 
However, previous lunar samples were collected only from the moon's near side, while significant differences exist between the near and far sides in their topography, composition and internal structure.
Against this backdrop, the research team from Institute of Geology from Chinese Academy of Geologist Sciences studied feldspathic impact-melt rocks in lunar soil samples returned by the Chang'e-6 mission. Using China's first independently developed ion probe system, researchers conducted a comprehensive analysis to test the lunar magma ocean model and examine how large impacts reshaped reservoirs in the lunar crust and mantle.
Through high-precision analyses, the team identified key clues to the moon's evolutionary history, suggesting that the stark differences between its near and far sides may be linked to the ancient giant impact that formed the South Pole-Aitken Basin.
The study found that the massive impact continued to profoundly reshape the lunar crust and upper mantle after the lunar magma ocean had solidified, fundamentally altering the material composition of parts of the moon's far side.
The findings add to the traditional lunar magma ocean model, suggesting that the formation and preservation of the moon's crustal and mantle reservoirs may have varied significantly from region to region and cannot be fully explained by a single, uniform model of primordial magma-ocean differentiation.
The research provides new scientific evidence for understanding the differences between the moon's near and far sides, while offering fresh insights into the moon's complex evolutionary history, according to Guangming Daily. 
Global Times
。审议通过民盟济南市第十三次代表大会决议。

C |      　　大会号召，民盟全市各级组织、广大盟员要更加紧密地团结在以习近平同志为核心的中共中央周围，坚定拥护“两个确立”、坚决做到“两个维护”，继承和发扬“奔走国是、关注民生”的优良传统，筑牢合作初心，勇担参政党使命，不断强化自身建设，提升履职效能，为建设“强新优富美高”新时代社会主义现代化强省会作出新的更大贡献。     　　会议选举产生了民盟济南市第十五届委员会领导班子，孟令军当选主任委员，李兴实、张爱波、王振东、刘明翠、邵莉、侯丽琨当选副主任委员，任命李少杰为秘书长。     　　张勇强在闭幕会上代表中共济南市委讲话，希望新一届民盟市委会团结带领全体盟员，赓续优良传统，勇担时代使命，坚定携手奋进的政治方向。守正创新推进自身建设，为济南民盟健康发展夯实根基。认真履职尽责，围绕现代化产业体系建设、黄河流域生态保护和高质量发展、城市更新等重点领域，交出精彩的履职答卷，在新征程上展现新气象、作出新贡献。

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Published on:18:32:47