The new discovery of "Zhu Rong" unveiled the superficial structure of Mars

The new discovery of "Zhu Rong"

As the most similar planet as the earth in the solar system,

What exactly is under the surface of Mars?

This is a long -term question of human beings.

Based on the "Zhu Rong" Mars car low -frequency radar data,

Chinese researchers discovered,

Under a weathered layer of about 10 meters thick on the surface of the Martian car,

There are two sets of sediment that becomes thinner,

Its formation may be with approximately 3.5 billion to 32 billion years

Multiple -phase water activities related;

Today, 0-80 meters below this area fire watch

No evidence of liquid water is found,

But the possibility of salt ice is not ruled out.

Related research results on September 26

Published online in "Nature" magazine.

May 15, 2021,

my country's first Mars detection task

The "Zhu Rong" Mars car carried by Tianwen No. 1

The landing area is pre -selected in the southern part of the Utopia Plain,

Start inspection and detection.

Zhu Rong's landforms in the landing area

Picture source: Tianwen No. 1 Zhu Rong Mars car

Based on the "Zhu Rong" Mars car

Tour in the landing area for 103 days,

Low -frequency radar data obtained by about 1171 meters,

Researchers "draw" out

The landing area is above 80 meters above 80 meters

High -precision structure layered image,

And analyzed the nature of strata material.

Picture of Chinese Academy of Sciences

They discover

Under the fire layer of about 10 meters thick in this area

Two sets of sediment that becomes thinner.

The first set of layers is about 10-30 meters underground,

Contains more stones

These stones gradually increased with depth.

"For short -term floods in about 1.6 billion years ago,

Long -term weathering or repeated meteorite impact may be possible

As a result, the formation of this set of thinning sediment. "

Institute of Geology and Earth Physics of the Chinese Academy of Sciences

Researcher Chen Ling explained.

The second set of layers is about 30-80 meters underground,

The stones contain are greater,

And the distribution is more messy,

It reflects the older and larger fire watch transformation incident.

"Based on the statistical of the impact pit of predecessors, the annual results of the statistical of the pits speculate, guess,

This transformation event may happen in

3.5 billion to 3.2 billion years ago

It is related to the large flood activities in the southern part of the Utopia Plain. "

Chen Ling said.

Picture of Chinese Academy of Sciences

also

"Zhu Rong" Martian car secondary surface detection radar

One of the main goals

It is the detection of the southern part of the utopian plain now

Whether there is groundwater/ice.

Low -frequency lightning reaching imaging results excluded

0-80 meters under the inspection path within the depth range of 0-80 meters

There is a possibility of rich water layer.

At the same time, the thermal simulation results further indicate that

Liquid water, sulfate or carbonate brine

It is difficult to land in the "Zhu Rong" Mars car landing area

Stable within 100 meters underground.

"However, the possibility of salt ice cannot be ruled out at present."

Chen Ling pointed out.

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