嫦娥五号返回月壤微观形貌特征及其对太空风化的指示意义

顾铱; 孙继尧; 肖倩; 李毅恒; 王心怡; 曹克楠; 刘亦婷; 何琦; 杨浩; 陈倩; 杨金昆; 宋文磊; 宗克清; 张文; 巫翔; 胡兆初; 肖龙; 佘振兵; 汪在聪

doi:10.3799/dqkx.2022.432

嫦娥五号返回月壤微观形貌特征及其对太空风化的指示意义

doi: 10.3799/dqkx.2022.432

顾铱^1, ,,
孙继尧¹,
肖倩¹,
李毅恒¹,
王心怡¹,
曹克楠¹,
刘亦婷¹,
何琦¹,
杨浩²,
陈倩³,
杨金昆³,
宋文磊³,
宗克清^{1, 4},
张文⁴,
巫翔^{1, 4},
胡兆初⁴,
肖龙^{1, 4},
佘振兵^{1, 2, ,},
汪在聪^{1, 4, ,}

1.
中国地质大学地球科学学院, 湖北武汉 430074
2.
中国地质大学生物地质与环境地质国家重点实验室, 湖北武汉 430078
3.
西北大学地质学系大陆动力学国家重点实验室, 陕西西安 710069
4.
中国地质大学地质过程与矿产资源国家重点实验室, 湖北武汉 430074

基金项目:

国家航天局民用航天技术预研究项目 D020205

中国地质大学生物地质与环境地质国家重点实验室 GBL12101

详细信息

作者简介:
顾铱（2002—），女，本科生，地质学专业.ORCID：0000-0001-7644-3949. E-mail：631348354@qq.com

通讯作者:
佘振兵，E-mail：zbsher@cug.edu.cn

汪在聪，E-mail：zaicongwang@cug.edu.cn

中图分类号: P1
计量
- 文章访问数: 362
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- 被引次数: 0
出版历程
- 收稿日期: 2022-09-30
- 网络出版日期: 2022-12-07
- 刊出日期: 2022-11-25

Morphology of Lunar Soil Returned by Chang'E-5 Mission and Implications for Space Weathering

Gu Yi^{1
,
,},
Sun Jiyao¹,
Xiao Qian¹,
Li Yiheng¹,
Wang Xinyi¹,
Cao Kenan¹,
Liu Yiting¹,
He Qi¹,
Yang Hao²,
Chen Qian³,
Yang Jinkun³,
Song Wenlei³,
Zong Keqing^{1, 4},
Zhang Wen⁴,
Wu Xiang^{1, 4},
Hu Zhaochu⁴,
Xiao Long^{1, 4},
She Zhenbing^{1, 2
, ,},
Wang Zaicong^{1, 4
, ,}

1.
School of Earth Sciences, China University of Geosciences, Wuhan 430074, China
2.
State Key Laboratory of Biogeology and Environmental Geology, China University of Geosciences, Wuhan 430078, China
3.
State Key Laboratory of Continental Dynamics, Department of Geology, Northwest University, Xi'an 710069, China
4.
State Key Laboratory of Geological Processes and Mineral Resources, China University of Geosciences, Wuhan 430074, China

摘要

摘要: 研究识别嫦娥五号返回月壤样品颗粒的类型、含量、形貌、结构和成分特征，可为嫦娥五号着陆区月壤的成因与月球表面演化过程提供关键科学依据.利用扫描电镜-能谱仪、矿物自动定量分析系统和显微激光拉曼光谱仪对嫦娥五号表取月壤样品CE5C0400（YJFM00403）进行了系统研究，发现月壤颗粒组成多样，包括斜长石、单斜辉石和橄榄石等矿物、玄武岩碎屑、黏结物和玻璃球.颗粒表面和内部微观结构复杂，呈现各种破碎、表面附着堆积、微撞击坑、溅射物等形式的微米-纳米级的形貌特征.嫦娥五号月壤的微形貌特征记录了以微陨石撞击为主导的复杂太空风化过程：一方面反复的撞击作用使月壤颗粒破碎、粒度变细，另一方面撞击引发的局部熔融又使颗粒发生胶结，同时伴随含铁矿物分解形成微-纳米级单质铁颗粒.上述过程反复进行，导致月壤颗粒大小和物相组成复杂多变.
- 嫦娥五号 /
- 月海玄武岩 /
- 玻璃球 /
- 黏结物 /
- 微撞击坑 /
- 微陨石
Abstract: Morphologic, structural and compositional characteristics of the lunar soil returned by Chang'E-5 provide invaluable insights into the origin of the lunar soil and the evolution history of the Moon' s surface. Using scanning electron microscopy-energy dispersive spectrometer and micro-Raman spectrometer, the scooped lunar soil sample CE5C0400 (YJFM00403) was systematically investigated. The lunar soil consists of a variety of particles, including single minerals such as plagioclase, clinopyroxene and olivine, basaltic clasts, agglutinates and glass beads. The surface features and microstructures of the particles are characterized by diverse, micrometer to nanometer scale morphological features in the form of fragmentation, surface attachment and microcratered and sputtered structures. The morphological features of Chang'E-5 lunar soil have recorded a wealth of information about the complex processes of space weathering dominated by micrometeorite impacts. Repeated impacts led to the fragmentation and fining of lunar soil particles, whereas impact-induced local melting welded the particles, accompanied by the formation of micrometer to submicrometer metal spheres through decomposition of iron-bearing minerals. Repeated cycles of these complex processes thus have resulted in significant changes in the particle sizes and mineral components of the lunar soil.
- Chang'E Five /
- mare basalt /
- glass beads /
- agglutinates /
- microcraters /
- micrometeorite

HTML全文

图 1 嫦娥五号月壤主要单矿物颗粒形貌及成分

a.月壤颗粒的暗场反射光图片，黄色为辉石，白色为斜长石；b~d.不同单矿物颗粒的光学照片（b，d.暗场反射光，c.明场反射光）；e~g.辉石（e.箭头示解理，插图中三角形示裂纹）、斜长石（f.箭头示解理，插图中三角形示双晶纹）和橄榄石（g）的二次电子图像；h.主要矿物的EDS谱线；i.主要矿物的拉曼光谱线. 图b~c中+号表示拉曼分析点位，e~g中的+号表示EDS分析点位

Fig. 1. Morphology and composition of single-mineral particles from the CE-5 lunar soil

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图 2 嫦娥五号角砾岩及典型玄武岩岩屑

a.角砾岩，呈明显的碎屑结构，箭头示黏结物颗粒中的气泡；b~h.玄武岩岩屑及其矿物组成：b.微晶结构；c.次辉绿结构；d.斑状结构；e.橄榄石硅酸盐液态不混溶结构；f.玄武岩颗粒的TIMA面扫图像；g~h.长条状‒针状磷酸盐区域拉曼面扫图像（g）和拉曼光谱线（h）.Ilm.钛铁矿；Ol.橄榄石；Fa.富铁橄榄石；Cpx.单斜辉石；Pl.斜长石；Ph.磷酸盐；Tro.陨硫铁；K-Si Glass.富硅钾质玻璃.图c和e引自He et al.（2022），有修改

Fig. 2. Breccia and typical basaltic clasts from the CE-5 sample

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图 3 嫦娥五号玄武岩岩屑的物相组成及其比例

Fig. 3. Mineral constituents and proportions of basaltic clasts from the CE-5 soil

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图 4 嫦娥五号月壤中黏结物的结构和成分特征

a~c. 单个黏结物颗粒，显示极不规则的外形和大量的气孔结构；d~f.黏结物颗粒表面局部放大，显示密集分布且大小不一的气孔；d~e.棒状颗粒局部被玻璃覆盖（e，箭头所示）以及玻璃表面的皱纹状微结构（f，箭头所示）；g.早期黏结物（G1）破碎后被晚期玻璃质（G2）局部覆盖胶结（箭头示二者界线）；h.含大量不规则纳米级颗粒的黏结物，其中心为疑似微陨石坑（箭头所示）；i.内部含骸晶（箭头及方框所示）的黏结物，右下角插图为骸晶局部放大；j~k.黏结物内部的气孔和球状亚微米‒纳米金属颗粒（箭头所示）；l.代表性黏结物（k）的TIMA矿物分布图. a~h.未抛光颗粒的二次电子图像；i~k.抛光树脂靶的背散射电子图像

Fig. 4. Microstructure and compositional features of agglutinates of the CE-5 lunar soil

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图 5 嫦娥五号样品不同粒径和形态的玻璃

a~j. 玻璃球：a~b.球形玻璃球；c.椭球形玻璃球；d~g.复合形态玻璃球，包括似纺锤状（d）、花瓶状（e）、双球状（f）和平顶状（g）；h.抛光靶中的玻璃球显示均一内部结构；i~k.半破碎的玻璃球（i）及其凹坑边缘液滴状附着物（j.箭头所示）和内部次级凹坑中的纳米颗粒集合体（k）；l.玻璃碎片；除h为背散射电子图像外，其余均为二次电子图像

Fig. 5. Various glasses in the CE-5 lunar soil

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图 6 嫦娥五号月壤颗粒表面的破碎结构

a.沿解理面发育的层状破裂（箭头示锐角状破碎结构）；b~c.颗粒表面的阶梯状破裂（b）及其局部放大（c）；d~e.颗粒表面的“裙状”纹理（d）及其局部放大（e）；f.弧形纹理结构；g. 齿状破碎结构；h~i. 发育气孔破碎结构的颗粒（h）及其局部放大（i）. 图片均为二次电子图像

Fig. 6. Broken surfaces of the CE-5 lunar soil particles

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图 7 月壤颗粒特殊附着结构

a~b.表面发育爬虫状（箭头所示）和链条状附着物（三角形所示）的颗粒；c. 穹隆状、颗粒状和链条状（三角形所示）附着物；d~e. 黏结物表面附着的纳米级颗粒；f. 黏结物表面的链条状纳米级铁质丘和较大的单质铁颗粒（阿波罗10084月壤样品，据Heiken et al., 1991修改）. 图片均为二次电子图像

Fig. 7. Attachment structures from lunar soil

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图 8 微撞击坑及相关结构

a~b.微米级近垂直撞击坑（箭头所示）及其溅射物；c.纳米级近垂直撞击坑；d.大小不等的倾斜角度撞击坑群；e.图d中方框内现象放大；f.近平行撞击划痕.图片均为二次电子图像

Fig. 8. Microcraters and related structures

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图 9 嫦娥五号月壤经历后期复杂改造过程的模式图

插图（1~5）示意各种太空风化产物，其中（1）和（3）分别据Li et al.（2022）和Gu et al.（2022）修改，（2）、（4）和（5）为本文资料

Fig. 9. Cartoon showing the complex reworking history of the Chang'E-5 lunar soil

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