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HomeUncategorizedThe analysis of a Martian meteorite that fell on Earth in 1815...

The analysis of a Martian meteorite that fell on Earth in 1815 casts doubt on the validity of the theory of planet formation


The recent study was It is based on the analysis of the Chassigny meteorite, whose composition is considered unusual, since, unlike other Martian rocks, it contains materials representative of the interior of the planet.

A new Study of an ancient meteorite has provided unexpected new details about how Earth and Mars acquired volatile elements, such as hydrogen, carbon, oxygen, nitrogen and noble gases, at the time of their creation.

Until now, it was assumed that rocky planets first accumulate these elements of the nebula around a young star. As the planet is at that moment a ball of molten rock, these gases dissolve in the ocean of magma and then degassed back into the atmosphere. Subsequently, the chondritic meteorites that collide with the newborn planet provide more volatile materials, explainsSandrine Péron, from the University of California at Davis, USA, the main author.

The study, which was published last week in the journal Science, is based on the analysis of the Chassigny meteorite, which fell in the northeastern France in 1815 and is considered unusual because, unlike other Martian rocks that had been exposed to the atmosphere of Mars, supposedly, contains materials representative of the interior of the planet , clarifies a statement.

The red planet is of special interest, since it was formed relatively quickly, since it solidified in about 4 million years after the birth of the solar system, while the Earth took between 50 and 100 million years.

By making extremely careful measurements of minute amounts of krypton isotopes in the Chassigny samples —which allow us to distinguish between gases of solar and meteoric origin— the researchers were able to deduce where the elements of the rock.

Surprisingly, the isotopes of krypton correspond to those from the meteorites, not from the solar nebula. This means that meteorites delivered volatile elements to Mars while it was in formation, much earlier than previously thought, contradicting conventional theory. Also, scientists concluded that Mars could not have formed exclusively by outgassing of the mantle.

“The Martian interior composition for krypton is almost purely chondritic, but the atmosphere is solar”, explains Péron. “It’s very different,” he adds.

The study “also raises some interesting questions about the origin and composition of the early atmosphere of Mars,” says Sujoy Mukhopadhyay. , the co-author of the investigation.


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