球粒陨石
风化土
天体生物学
碳质球粒陨石
撞击坑
小行星
地质学
陨石
太空风化
人口
普通球粒陨石
矿物学
地球化学
物理
人口学
社会学
作者
Yazhou Yang,Shuai Li,Meng‐Hua Zhu,Yang Liu,Bo Wu,Jun Du,Wenzhe Fa,Rui Xu,Zhiping He,Chi Wang,Bin Xue,Jianfeng Yang,Yongliao Zou
出处
期刊:Nature Astronomy
[Nature Portfolio]
日期:2021-11-25
卷期号:6 (2): 207-213
被引量:12
标识
DOI:10.1038/s41550-021-01530-w
摘要
The Moon has experienced an intense bombardment history since its formation1. Fragments of the impactor can remain on the lunar surface2,3,4 and can provide evidence of the evolution of the impactor composition and impact population in the Earth–Moon system3,4,5. However, the retained impactor fragments previously identified in the Apollo samples have been well mixed into bulk lunar regolith due to the subsequent impact gardening, and their properties cannot be easily isolated3,6,7. Here we report observations of a two-metre-sized crater that formed less than one million years ago obtained by the Yutu-2 rover of Chang’e-4. Hyperspectral images in the visible and near-infrared range (0.45–0.945 μm) with a spatial resolution less than 1 mm per pixel highlight the presence of glassy material with high concentration (47%) of carbonaceous chondrites. We identify this material as remnants of the original impactor that was not entirely vaporized by the impact. Although carbonaceous chondrite fragments have been found in Apollo samples8,9, no carbonaceous chondrite remnant had been directly observed on the lunar surface by remote sensing exploration. We suggest that carbonaceous chondrite-like bodies may still provide one of the sources of water to the present Moon.
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