New samples from the moon help to learn more about its history

A new study has found that the iron- and calcium-rich surface of lunar basalts

Scientists found this out in a study by analyzing soil samples brought back as part of the Chang'E-5 (CE-5) mission in 2020.

A group of scientists published their findings in the journalNature Communications. In the study, they used the methods of spectroscopic and X-ray diffraction analysis. The goal is to determine the mineral composition of lunar soil samples delivered by CE-5.

Spectral interpretation of the mineral composition of marine basalts at the late stages, presented by Chang'E.Photo: NAOC

Basically, they turned out to be pyroxenes.The discovery surprised scientists. Earlier studies based on remote sensing showed a high content of olivine. This is another common volcanic mineral composite from the basalt category.

Compared to other samples collectedduring previous missions, the overall composition of pyroxene in CE-5 samples is relatively rich in iron and calcium. To find out, the scientists used an electron microprobe.

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