Chinese scientists have achieved new progress in the history of the Chang'e -5 landing area of volcanic activity

my country Chang'e -5 lunar probe landed in the northeast of the Lunar Storm in December 2020, and then sampled the moon surface substance near the landing point and successfully brought the moon sample back to the earth. The reason why the Northeast region of the Storm Cripu Ge is selected as the landing area of ​​Chang'e 5 is mainly because it is considered one of the youngest basalt units on the surface of the moon and rich in uranium, 钍, potassium and other raw fever. element. Previous simulation research believes that the rich heating elements rich in storm Kripu are the main reasons for maintaining the moon volcanic activity. Therefore, research on the thickness and eruption rate of the Chang'e -5 landing area will further enhance people's understanding of the history of the lunar volcanic activity and internal thermal evolution.

Recently, researchers from the Sun Event and Space Weather Key Laboratory of the National Space Science Center of the Chinese Academy of Sciences and researchers from the Shanghai Academy of Sciences Shanghai Observatory, Peking University, Shandong University (Weihai) (Weihai) researchers to estimate the basalt thickness of the Chang'e -5 landing area. Researchers determine the distribution characteristics of titanium content in the collision pits in Chang'e 5, and combine the results of the annual results of the annual annual results of the moon table impact pits and the radioactive homogenous annual results of the Chang'e 5 Xuanwuyan sample. The formation of the regional basalt unit is the order. The research team uses the multi -source remote sensing data such as optical, terrain, spectrum, and gravity. Based on the depth of penetration and penetrating the impact pit, the terrain evolution process of partial flooding pits, and the effective density spectrum describing the degree of gravity and terrain. The thickness of the Chang'e 5 landing area.

The research results show that the Chang'e -5 landing area has experienced at least four volcanic magma eruptions, with median thickness of 230 meters, 70 meters, 4 meters, and 36 meters, respectively. From the perspective of the spatial distribution trend of Xuanwu Rock thickness, research found that as the distance between the two Yuexi two Yuexis of RIMA and MAIRAN gradually increased, the thickness of Xuanwu Rock decreased, which indicates that the volcanic exit of the two Yuexi Moon Creek Rima and Mairan is the Chang'e No. 5 landing area. The eruption source of Xuanwu Rock. Furthermore, combined with the results and age estimation results of the Xuanwu Rock Unit, the eruption rate of the Chang'e -5 landing area of ​​the Chang'e -5 landing area was studied. About 2 quantities) enhanced.

Studies believe that the positive storm of the moon is rich in raw fever elements in Yang Kripu, which is the main reason why the late moon volcanic activity is still active. However, the latest sample research results show that the basalt of the Chang'e -5 landing area is not the Krig Patsuma. This study proposes a possibility that the raw thermal elements in the Crip Land body of the storm do provide heat sources for the melting area of ​​the moon curtain, but the magma may not have time in the process of rising from the moon curtain to the moon surface. The Crep component in the Crepan Grade was fully mixed with the storm, which led to the fact that the Chang'e 5 Xuanwu Rock Sample was not measured to be measured. In addition, the thickness of the monthly shell of Chang'e -5 landing area is about 25%smaller than the average moon shell, and the early neighboring rain sea basin impact may form a large -scale cracking structure in the moon shell. These factors are beneficial to the moon curtain. The magma erupted to the moon table. The maintenance mechanism of the late moon volcanic activities has always been a hot issue in the scientific research of the moon, and the further excavation research on Chang'e 5 Xuanwu Rock Sample is expected to provide new constraints for the existing moon thermal chemistry and dynamic models, so as to explain the moon The duration and eruption scale of volcanic activities provide strong evidence. (CCTV reporter Shuaijunquan)

Source: CCTV News Client

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