Traveling through time and space & Doing timey wimy stuff.

As of Month of 7th July 2022, The CNSA –China National Space Administration CLEP- China Lunar Exploration Program  Belt and Road Initiative Lunar Mission……Chang’e-4 with Yutu two the Lunar rover still working exploring more than moved more than 1239.88  meters on the other side of the moon on the 103 Kilometers Diameter Von Karman Crater in which is least than two length by length fifty five Kilometers Hong Kong –Macau- Zhuhai Bridges …. Working Exploring the Crater on the other side of the Moon Chang’e Luna…. Chang’e-4 completed the 44th day of work, and the results revealed the cause of the abnormal area of ​​​​the Moon’s South Pole-Aiken ….composition travelling The “Yutu 2” lunar rover and lander of the Chang’e The total mileage of the lunar rover on the far side of the moon is 1239.88 meters

In which Chang’e-4 research results reveal the secrets of the Antarctic-Aiken Basin The cause of the abnormal area of ​​composition…..

The South Pole-Aiken Basin is the largest impact basin on the Moon, with a diameter of over 2,400 kilometers. The study of the South Pole-Aiken Basin is of great significance for revealing the origin of the lunar asymmetry, the impact process, the early evolution process and the composition of the deep material. Orbital remote sensing observations show that there is a compositional anomaly in the center of the Antarctic-Aiken Basin. The planetary science team of Shandong University analyzed and interpreted the in-situ visible and near-infrared spectral data of the Yutu-2 lunar rover and found that the lunar crust is the Antarctic-Aiken composition anomaly. The main material source provides important constraints for the future exploration of materials in the Antarctic-Aiken Basin and even the deep parts of the moon.

​The main material components on the lunar The material composition at the bottom of the South Pole-Aiken Basin is abnormal, and the content of mafic silicate minerals and iron is significantly higher than that in the peripheral area of ​​the basin (Figure 1).

Figure 1. The distribution of iron and pyroxene content inside and outside the Antarctic-Aiken Basin

Most of the previous studies on the material composition of the Antarctic-Aiken Basin only focused on mafic minerals. Due to the anomalous characteristics of mafic in this region, there has even been a debate about whether the lunar mantle is peridotite or pyroxene. Although according to the lunar magma ocean hypothesis, olivine and pyroxene are the main minerals of the lunar mantle, the plutonic magma intrusion after the formation of the lunar crust can also form rocks rich in olivine or pyroxene in the lunar crust, so olivine is enriched Or pyroxene does not serve as evidence of origin from the lunar mantle. So far, humans have not obtained samples from the Antarctic-Aiken Basin and returned to Earth, and their trace elements and isotopic characteristics cannot be known. Among the material composition information available through remote sensing or in situ detection, the plagioclase content also distinguishes crust-derived and mantle-derived rocks. key indicators.

Figure 2. Mineral composition and source reservoir of Chang’e-4 landing area

​The content of plagioclase in the material of the Antarctic-Aiken composition anomaly area sputtered by the Finsen
Numerical simulation studies believe that during the excavation process of the South Pole-Aiken impact, the lunar crust has been completely stripped, but in the subsequent transformation stage, the collapse of the instantaneous crater wall may cause the lunar crustal material to slip off the bottom of the basin. In addition, other basin impact events after the Antarctic-Aiken impact event also produced a backfilling effect on the bottom of the Antarctic-Aiken Basin, and the exposed lunar mantle material or impact melting products during the formation of the basin is likely to have been diluted by the lunar crust material. Mineralogical and geochemical unmixing analysis results show that the lunar soil on the surface of the anomalous area is composed of about 70% of the lunar crust material and about 30% of the material enriched in iron and incompatible elements.

The first author of this research is postdoctoral fellow Chen Jian of Shandong University, and the corresponding author is Professor Ling Zongcheng, head of the planetary science team of Shandong University and senior researcher of the Center for Excellence in Comparative Planetology, Chinese Academy of Sciences. It was published in The Astrophysical Journal Letters, an international astronomy journal …..

Images and visuals are from their Respectives source CLEP – China Lunar Exploration Project

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