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how is the lunar soil formed and what is its value?
time:  2021-08-18 source: suzhou lanscientific co.,ltd.

how is the lunar soil formed and what is its value?

at 1:59 on december 17, the chang'e-5 returner carried a lunar sample back to earth and successfully landed in the planned area of siziwang banner in inner mongolia. china's first extraterrestrial celestial body sampling and return mission was successfully completed. this also marked the successful victory of the three-step ending battle of the chinese lunar exploration project of "circumnavigating, descending, and returning".

on december 19, the lunar sample of the chang'e-5 mission, weighing 1,731 grams, was officially handed over.

my country's first extraterrestrial celestial body sample storage, analysis and research work has kicked off, and the application and research of lunar samples and scientific data will be carried out.


how is the lunar soil formed?

the lunar soil currently owned by mankind comes from 9 lunar exploration missions. in the 6 missions of the apollo moon landing program, a total of 382 kg of lunar samples were collected and brought back from 6 different locations on the front of the moon, of which about 1/3 were lunar soil; the soviet union’s 3 lunar missions also recovered a sample of about 300 grams of lunar soil was used.

unlike the earth, which is full of air flow, the lunar soil is on the moon without air, and it mainly depends on physical weathering.

in the early days of the moon's formation, about 4.5 billion years ago, the surface of the moon was very hot, in a state of semi-solid molten magma.

then the lunar crust began to cool and solidify. during these billions of years, there have been constant collisions between large and small meteors and the moon. they move very fast. even small meteors with small mass can cause great damage. smash the surface of the moon into a "pit-and-pit" shape.

repeated impacts cause solid rocks to continue to break, cement, and mix. the huge temperature difference between day and night also accelerates the fragmentation of the moon's rock and minerals.

secondly, the formation of the lunar soil is also inseparable from the role of the solar wind.

without the protection of the magnetic field and atmosphere, the high-speed solar wind particles drive in directly, ion implantation, amorphization and material sputtering are carried out on the surface of the broken lunar mineral particles, and then they are deposited on the surface of the fine particles, thereby changing the lunar soil particles. structure and composition.

what are the main components of lunar soil?

since the moon has almost no atmosphere, the surface of the moon has been impacted by micrometeorites and injected by solar wind particles for a long time. the injection of solar wind particles makes the lunar soil rich in rare gas components.

the most precious of these is helium-3. helium-3 (3he) is an ideal material with large pollution-free reserves and high energy efficiency. if helium-3 nuclear fusion power generation is used as an alternative energy source, china will only need more than 10 tons of helium-3 each year, and the world will only need more than 100 tons can meet all energy needs.

the content of helium 3 in the lunar soil is relatively stable, and the total resource of helium 3 in the lunar soil can reach 1 million-5 million tons. the helium 3 that can be extracted from natural gas on the earth is very small, only 15-20 tons. it is estimated that helium-3 on the moon can at least meet the energy demand of human beings for 10,000 years, and it will be the focus of research by scientists from all over the world in the future.

in addition, the lunar soil also contains resources such as titanium and iron in the lunar sea basalt, krippite and rare earth elements, thorium, uranium and other resources (kreep (kreep) is one of the three highland rock types. it is named because it is rich in k (potassium), ree (rare earth elements) and p (phosphorus), as well as rich chromium, nickel, potassium, sodium, magnesium, silicon, copper and other metal mineral resources.

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