Mars took 20 million years to become what it is today, according to a new study. Thus, the planet took 15 million years longer than was previously thought to form, and American scientists believe that up to three large asteroids with a diameter between 1000 to 2000 km, may have struck The red planet is relatively early in its evolution.
They suggest that the planet then gradually forms, by accumulating its mass by pulling the particles into the gravitational field that it collected to reach its current diameter of 4220 miles (6792 km), according to Russia today, while this study contrasts with previous theories that indicate that the red planet grew rapidly Within only 2 to 4 million years, after the beginning of the formation of the Solar System.
There are about 200 Martian meteorites on Earth, and it is believed that they were ejected from Mars while colliding with large asteroids. In the past, scientists used these Martian meteorites to create a timeline for the formation of the planet and map its mysterious history. The team based on their findings on simulating computer modeling of an asteroid that collides Mars after the formation of his heart and mantle, which is the layer surrounding the nucleus.
“We knew Mars received elements such as platinum and gold from the early, large collision, and to verify this process, we performed simulations of the smooth hydrodynamic effect of particles,” said lead author Dr. Simon Marchi of the Southwest Research Institute in San Antonio, Texas.
He pointed out that, based on the simulation model, early collisions produced the heterogeneous Martian mantle, and of the approximately 61,000 meteorites found on Earth, only 200 or so of them are believed to be from the origin of Mars. Modeling the mixture of materials that formed the early Mars scarf. The results revealed that Mars received a variety of elements, such as tungsten, platinum and gold, which are attracted to iron as a result of these collisions.
“Based on our model, early collisions produced the heterogeneous Mars mantle similar to the Marble cake,” Dr. Marchi said. The eyes also indicated that the red planet was subjected to collisions of planets early in the formation of the core nucleus of the planet, because the “loving” elements For iron, “like tungsten, platinum, and gold, the planet’s mantle generally migrates to its central iron core during formation.
Thus, evidence about the presence of these elements in the Martian mantle as found in these meteorites indicates that Mars was bombed by rock space debris sometime after its primary formation ended, and early large collisions could have altered the balance of tungsten, which It could support a Mars scale of formation of up to 20 million years, as evidenced by the new model.
“To fully understand Mars, we need to understand the role that older and more active collisions played in its evolution and composition,” said Marchi, and the next generation of Mars missions, including plans to return samples to Earth, could provide new information on the volatility of “iron-loving” elements in The rocks of Mars and the early development of the red planet.