Friday , November 27 2020

Earth's oldest rock found in the moon – The New Indian Express



to PTI

Scientists say Apollo 14 astronauts have discovered what is the oldest rock on Earth in a moon specimen returned from the moon.

An international team related to the US Lunar Exploration and Exploration Center (CLSE) has found evidence that rocks have been fired from Earth by asteroids or comets that have a large impact.

This shock was thrown into space through the earth's primitive atmosphere and collided with the moon's surface. The Earth 's surface collided with the Earth about three billion times more than the Earth.

This rock was blended into one sample with another lunar surface material, according to a study published in the Journal of the Earth and Planetary Science Journal.

The team developed a technique to place impactor debris on the Moon's Legist, causing David A Kring, a senior CLSE researcher, to challenge the Earth to place the sculpture on the moon.

The researchers found two grams of rock fragments of quartz, feldspar and zircon. They are all found on earth and are not very visible on the moon.

The chemical analysis of the rock fragments shows that it was crystallized in an oxidation system such as land, such as earth temperature, rather than the reduction and high temperature conditions characteristic of the moon.

Killing, a scientist at the University Space Research Institute (USRA) of the Lunar and Planetary Institute (LPI), said, "This is a special discovery that helps us draw better pictures of the bombing of our planet in the early days and early dawn of life. to be" .

Samples are not of Earth origin, but are likely to crystallize on the Moon instead. However, researchers said they would need conditions that were never inferred from the month sample.

They said samples would have to be formed at enormous depths in the mantle of the moon, where very different rock compositions are expected.

The simplest interpretation is that the samples came from Earth, the researchers said.

The rock crystallized about 20 kilometers from about 40 to 4.1 billion years ago under the surface of the earth.

It was then unearthed by one or more major impact events and fired into the space of the moon.

A previous study by the team found that clashes with an asteroid at that time were large enough to lift the substance to that surface, because the Earth's diameter produced craters of thousands of kilometers.

When the sample arrived at the surface of the moon, it was affected by several other impact events, one of which melted partially to 3.9 billion years ago and probably buried beneath the surface.

Thus, the sample is an artifact of intense bombing that formed the solar system for one billion years.

After that period, the moon was affected by small, less frequent shocks.


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