嫦娥六号着陆点米至百米尺度陨石坑和厘米级岩石的特征

IF 4 1区 地球科学 Q1 GEOCHEMISTRY & GEOPHYSICS
Chenxu Zhao, Zhaoqin Liu, Kaichang Di, Sheng Gou, Zongyu Yue, Wenzhe Fa, Jia Wang, Guolin Hu, Ziqing Cheng, Biao Wang, Wenhui Wan, Man Peng, Bin Xie, Yuke Kou
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引用次数: 0

摘要

北京时间2024年6月2日,中国的嫦娥六号(CE-6)探测器成功降落在南极-艾特肯盆地内的阿波罗盆地,并带回了人类历史上第一个月球背面样本。下降相机在下降和着陆过程中拍摄了数百张高分辨率图像。利用这些图像生成高分辨率数字正射影像图(DOM)和数字地形模型(DTM)。我们根据生成的分辨率分别为0.03 m/像素(Map-1)和0.3 m/像素(Map-2)的dom和dtm,创建了米到百米的陨石坑和厘米大小的岩石目录。分析了陨石坑和岩石的分布和形态特征,包括完整直径、空间密度、陨石坑类型、深径比和岩石丰度。通过识别和测量同心陨石坑,我们估计在Map-2区域的中位风化层厚度为1.85 m。相对较薄的月球风化层导致大多数陨石坑在形成过程中到达高强度基底,这是CE-6新陨石坑深度/直径比(0.116)低于其他着陆点(例如CE-5着陆点为0.15)的主要原因。岩石粒度分析显示,CE-6着陆点岩石丰度为0.179%,接近CE-4着陆点的0.21%。基于喷射物厚度模型和扩散函数,我们发现一个相对较新的直径4.7 m的陨石坑的喷射物可能存在于采样位置的最上层。本研究生成的数据集可在https://doi.org/10.5281/zenodo.14920942上公开获取。
本文章由计算机程序翻译,如有差异,请以英文原文为准。

Characterization of Meter-to Hectometer-Scale Craters and Centimeter-Sized Rocks in the Chang'e-6 Landing Site Measured From Descent Imagery

Characterization of Meter-to Hectometer-Scale Craters and Centimeter-Sized Rocks in the Chang'e-6 Landing Site Measured From Descent Imagery

China's Chang'e-6 (CE-6) probe successfully landed in the Apollo Basin within the South Pole-Aitken Basin on 2 June 2024 (Beijing Time), and returned the first lunar farside samples in human history. The descent camera captured hundreds of high-resolution images during the descending and landing. High-resolution digital orthophoto map (DOM) and digital terrain model (DTM) were generated from these images. We created catalogs of meter-to-hectometer craters and centimeter-sized rocks from the generated DOMs and DTMs of 0.03 m/pixel (Map-1) and 0.3 m/pixel (Map-2) resolutions. The distribution and morphological characteristics of craters and rocks were analyzed, including completeness diameter, spatial density, crater type, depth/diameter ratio, and rock abundance. By recognizing and measuring concentric craters, we estimated a median regolith thickness of 1.85 m in the Map-2 area. The relatively thin lunar regolith resulted in most craters reaching the high-strength substrate during the cratering process, which is the primary reason for the lower depth/diameter ratio (0.116) of the fresh CE-6 crater compared with other landing areas (e.g., 0.15 at CE-5 landing site). Size analysis of the rocks revealed that the CE-6 landing site has a rock abundance of 0.179%, which is close to the value (0.21%) of the CE-4 landing site. Based on the ejecta thickness model and diffusion function, we found that the ejecta from a relatively fresh 4.7 m diameter crater is likely to be present in the uppermost layer of the sampling location. The data set generated in this study is publicly available at https://doi.org/10.5281/zenodo.14920942.

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来源期刊
Journal of Geophysical Research: Planets
Journal of Geophysical Research: Planets Earth and Planetary Sciences-Earth and Planetary Sciences (miscellaneous)
CiteScore
8.00
自引率
27.10%
发文量
254
期刊介绍: The Journal of Geophysical Research Planets is dedicated to the publication of new and original research in the broad field of planetary science. Manuscripts concerning planetary geology, geophysics, geochemistry, atmospheres, and dynamics are appropriate for the journal when they increase knowledge about the processes that affect Solar System objects. Manuscripts concerning other planetary systems, exoplanets or Earth are welcome when presented in a comparative planetology perspective. Studies in the field of astrobiology will be considered when they have immediate consequences for the interpretation of planetary data. JGR: Planets does not publish manuscripts that deal with future missions and instrumentation, nor those that are primarily of an engineering interest. Instrument, calibration or data processing papers may be appropriate for the journal, but only when accompanied by scientific analysis and interpretation that increases understanding of the studied object. A manuscript that describes a new method or technique would be acceptable for JGR: Planets if it contained new and relevant scientific results obtained using the method. Review articles are generally not appropriate for JGR: Planets, but they may be considered if they form an integral part of a special issue.
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