In early scientific expeditions, scientists have found water on the surface of Mars, and there are signs that there is so much water that it can even support and nurture life, but it has been a matter of question about where the water came from. The latest paper, published in Nature Geoscience, suggests that water molecules on Mars may come from two different sources.
Since it is difficult for humans to reach Mars to conduct on-site research, it is difficult for us to study the water on Mars in depth. Fortunately, Mother Nature transported Martian debris to Earth in the form of meteorites. In particular, two of these meteorites, Allan Hills 84001 and Northwest Africa 7034, provide valuable information for our study of Martian water.
“Many people have been trying to understand the water history of Mars,” Jessica Barnes, lead author of the study, said in a statement. Where does the water come from? How long has it been in the Martian crust (surface)? Where does the water inside Mars come from? Can water tell us about how Mars came and how it formed and evolved? “
In further study of the two meteorites, Barnes and her team point out that they contain a large number of different hydrogen isotopes. They are called “light hydrogen” and “heavy hydrogen”, and they imply two different sources of water, and neither of the rocks match the composition of the planet’s crust.
Because hydrogen is one of the genesis of water, the ratio of these two isotopes locked in rocks can help us understand the history of the water in which they live – just like fossils of water, which can analyze traces of their existence to understand the chemical processes they experience and their origin.
This suggests that Mars probably obtained water from at least two distinct sources in its early history. The researchers found that this variability meant that Mars, unlike Earth and the Moon, had never completely surrounded the Earth’s magma ocean.
“These two different sources of water inside Mars may be telling us something about the various objects that can be massed into the inner rocky planet,” Barnes said. “Two very different asteroids with very different water content may have collided and have never been completely mixed. “This situation is also important for understanding mars’ past habitability and astrobiology. “
The researchers say the major discovery is a far cry from the current mainstream theory of Mars, which has been thought to be more of an Earth-like planet like Earth, slowly forming the current face from the huge dust and gas surrounding the sun, through the avoluate of polar penetration, But the study gave researchers different ideas.
By matching isotope components, the martian crust has different proportions of hydrogen molecular isotopes, which may represent the origin of the Martian crust and the mantle, which is very different from Earth and could be a variable to the ultimate dream of moving to Mars and other humans, the researchers said.