Lai Jialong, Xu Yi, Bugiolacchi Roberto, Meng Xu, Xiao Long, Xie Minggang, Liu Bin, Di Kaichang, Zhang Xiaoping, Zhou Bin, Shen Shaoxiang, Xu Luyuan
State Key Laboratory of Lunar and Planetary Sciences, Macau University of Science and Technology, Macau, China.
School of Science, Jiangxi University of Science and Technology, Ganzhou, China.
Nat Commun. 2020 Jul 9;11(1):3426. doi: 10.1038/s41467-020-17262-w.
The unequal distribution of volcanic products between the Earth-facing lunar side and the farside is the result of a complex thermal history. To help unravel the dichotomy, for the first time a lunar landing mission (Chang'e-4, CE-4) has targeted the Moon's farside landing on the floor of Von Kármán crater (VK) inside the South Pole-Aitken (SPA). We present the first deep subsurface stratigraphic structure based on data collected by the ground-penetrating radar (GPR) onboard the Yutu-2 rover during the initial nine months exploration phase. The radargram reveals several strata interfaces beneath the surveying path: buried ejecta is overlaid by at least four layers of distinct lava flows that probably occurred during the Imbrium Epoch, with thicknesses ranging from 12 m up to about 100 m, providing direct evidence of multiple lava-infilling events that occurred within the VK crater. The average loss tangent of mare basalts is estimated at 0.0040-0.0061.
月球面向地球一侧和背面之间火山产物分布不均是复杂热历史的结果。为了帮助解开这种二分法，首次有月球着陆任务（嫦娥四号，CE - 4）瞄准了月球背面，在南极艾特肯盆地（SPA）内的冯·卡门撞击坑（VK）底部着陆。我们基于玉兔二号月球车在最初九个月探索阶段收集的探地雷达（GPR）数据，展示了首个深部地下地层结构。雷达图像揭示了测量路径下方的几个地层界面：埋藏的喷出物被至少四层不同的熔岩流覆盖，这些熔岩流可能发生在雨海纪，厚度从12米到约100米不等，为VK撞击坑内发生的多次熔岩填充事件提供了直接证据。月海玄武岩的平均损耗角正切估计为0.0040 - 0.0061。
