Home » Xinhua All Media+|The latest research results of the Chang’e 5 lunar samples are released, refreshing the traditional understanding of the evolution of the moon | Moon | Chang’e 5 | Scientific research_Sina Technology_Sina

Xinhua All Media+|The latest research results of the Chang’e 5 lunar samples are released, refreshing the traditional understanding of the evolution of the moon | Moon | Chang’e 5 | Scientific research_Sina Technology_Sina

by admin


Original Title: Xinhua All Media+|The latest research results of the Chang’e 5 lunar samples released, refreshing the traditional understanding of the evolution of the moon

Xinhua News Agency, Beijing, October 19 (Reporters Zhang Quan and Dong Ruifeng) Magma activity still existed on the moon until 2 billion years ago. The lunar mantle source area of ​​late magma activity is not rich in radioactive heat generating elements, and it is very dry… On the 19th, the Chinese Academy of Sciences released the latest research results of the Chang’e-5 lunar scientific research samples. A number of breakthroughs have given a new understanding of the evolution of the moon.

The duration and geochemical characteristics of lunar basalt magma are the “keys” for understanding the thermal-chemical evolution of the moon. Previous studies have confirmed that magma activity on the moon lasted at least approximately 2.8 to 3 billion years ago. However, there has been controversy in the scientific community about the exact time when the lunar magma activity ceased.

The study found that the lunar sample of Chang’e-5 is a new type of lunar basalt, which is different from the lunar samples returned from the sampling missions of the United States and the Soviet Union. Researchers analyzed more than 50 uranium-rich minerals in the basalt cuttings of the Chang’e-5 lunar sample, and determined that the basalt formation age was 20.30±0.04 billion years, indicating that there was still magma activity on the moon until 2 billion years ago, which is more than the limit of previous lunar samples. Magma activity has been extended for about 800 million years.

See also  PRESS INVITATION - Capsud.net - Rich and complete information on DR Congo

The cause of the most late magmatic activity on the moon has always been an unsolved mystery. There are currently two possible explanations in the scientific community: the lunar mantle source is rich in radioactive elements to provide a heat source, or the moon mantle is rich in water to lower its melting point.

The latest study found that the lunar mantle source area of ​​the basalt from the lunar sample of Chang’e 5 is not enriched with “Krip material.” Since the “Krip material” is rich in radioactive heat-generating elements, this result proves that the radioactive heat-generating elements of the lunar mantle are not the main reason for the formation of the basalt of the Chang’e-5 lunar sample.

Regarding whether the magma source area is rich in water, the scientific research team measured the water content and hydrogen isotopic composition in the basalt of the Chang’e 5 lunar sample, and found that the water content in the lunar mantle source area was only 1 to 5 micrograms/g, which means that the lunar mantle Very “dry”. This discovery also excludes the hypothesis that the lunar mantle is rich in water and has a low melting point, leading to an abnormally prolonged duration of magma activity in this area.

“This series of results raises new scientific questions for the study of the lunar thermal evolution history. The reason for the slow cooling of the moon is not clear. It requires a new theoretical framework and evolution model, and proposes a new direction for future lunar exploration and research. “Said Li Xianhua, academician of the Chinese Academy of Sciences and researcher of the Institute of Geology and Geophysics of the Chinese Academy of Sciences.

See also  Francis, the pope emeritus and the "already signed" resignation: what's true in the resignation rumors?

This series of research is led by the Institute of Geology and Geophysics of the Chinese Academy of Sciences and the National Astronomical Observatory, and jointly carried out by a number of research institutions. The related results have resulted in 4 papers, one published in the National Science Review, and three published in the international academic journal Nature. Articles.


.

You may also like

Leave a Comment

This site uses Akismet to reduce spam. Learn how your comment data is processed.

This website uses cookies to improve your experience. We'll assume you're ok with this, but you can opt-out if you wish. Accept Read More

Privacy & Cookies Policy