Magma system on Mars may hold some secrets about the Red Planet’s hidden side that scientists never expected. Deep beneath it’s surface, Mars hold some clues that can prove it was much active in earlier times.
A recent study found evidence that Mars had large connected magma systems beneath the surface. The evidence was found by NASA’s InSight. This finding suggest a complex set of geology that may have moved and processed molten rock through huge reservoirs in mars’ crust, although mars never had the geology to form plates like earth. This discovery could impact the scientists understanding about the formation of Mars, formation of Martian crust, and the conditions that explain how life could be possible in the past.
Why Mars radiation could be the biggest threat to human survival?
Marsquakes revealed Hidden Magma System on Mars.
This discovery was not made by drilling into Mars. Scientists had used vibrations propagating through the planet.
NASA’s InSight lander touched down on the Red Planet in 2018. It had a very sensitive seismometer, which detected marsquakes during its mission. These vibrations propagate through different layers of the planet’s lithosphere. This allowed researchers to see what was happening below the surface. By analyzing how the seismic waves propagate through different types of rock, it was possible to determine their composition. The new research found a major seismic boundary at a depth of around 24 km below the surface. Another one, marking the boundary between the crust and mantle, about at a depth of 38 km. The layer between them was complex, and scientists suspected that it contains a mix of different rock types. This is one of the most important findings that contributed to the new theory about the magma system on Mars.
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A 14-Kilometer Layer May Hold the Biggest Clue
One of the most surprising things is this layer in the lower crust that has been strongly deformed due to melting and crystallization. The researchers’ models suggest that Mars may possess a 14 km thick melt-depleted ultramafic cumulate layer beneath the seismic boundary. In other words, it can assume as the leftover rock created after molten material underwent extensive crystallization and separation.
Ultramafic rocks are generally contains high contents of magnesium and iron. They are typically found in greater depths in rocky planets. What’s important is that this structure is not typical for the simple sedimentary-type crust. Instead, it indicates that there could have been processes of magma circulation, chemical differentiation, and crystallization inside the Martian interior.
This line of evidence points to a much more active ancient magma system on Mars than scientists believe.
How Mars Built Complex Magma Systems Without Plate Tectonics?
Scientists are surprised by this discovery even more when they compare Mars with our planet, Earth.
On Earth, plate tectonics plays an important role in transporting recycling the material back into the crust and mantle, and facilitating the formation of large, complex magmatic systems in the planet’s crust and mantle. But Mars is different. There is no evidence that Mars has Earth-like global plate tectonics, but according to the new study, on Mars, vertically integrated or transcrustal magmatic systems could still have developed. A transcrustal system is not an isolated body of lava that takes the form of an underground lake, but rather a network, through which magma travels, stagnates, crystallizes and changes.
The difference is significant. The authors of the study do not claim that Mars has a gigantic ocean of liquid magma beneath its surface, but rather that the planet once had geological processes similar to those on Earth. This makes the discovery of the magma system on Mars much more interesting than just finding evidence of magma on the surface of the planet.
How Scientists Revealed the Hidden Magma System on Mars?
Scientists cannot examine deep inside the Mars directly. So they had to put together all of the possible evidence leading to an answer. First of all, the NASA InSight team has some vital information on Mars, which they found out by checking the seismic waves’ movement. From the seismic data, they learnt that Mars has the structure of a layered crust. scientists used geological modeling to find out the materials present on Mars. They found the rock structure must consist of more mafic rocks at shallow depths and ultramafic rocks deeper down.
Scientists also analyzed the heat flow at which the structures on Mars would be formed. According to their hypothesis, Mars once experienced much higher heat flow than present day. The process of upwelling in the mantle could have contributed to the high temperature. According to scientists this increase in heat happened because mantle upwelling may brought hot materials upward, while magmatic intrusions could have added heat and molten rock to the crust. These discoveries help us to know how Magma system on Mars formed.
The magma system on Mars, which was probably present under the surface, can explain all of the geological patterns in the Martian lithosphere. Scientists managed to put together seismic data, geological analysis of the rock composition, and thermal data to find out the possible cause of geological structures of Mars. Thus, it can be said that a magma system on Mars contributed to the changes in the Martian lithosphere.
In such a way, there is a sufficient amount of evidence, which supports the theory of a magma system on Mars. Although scientists could not examine the specific area, they received enough data from studies of seismic waves. Therefore, it can be said that there probably was a magma system in the past geology of Mars. The study of the magma system on Mars will probably provide the scientists with more information on the old lithosphere of Mars.
What Does This Tell Us About Ancient Mars?
Today Mars is a cold and dry place, but long ago it was far more active. The surface of the Red Planet holds clues to its past. For example, there are signs of the planet’s geologically active past.
Most notably, Mars contains the biggest volcano in our solar system called Olympus Mons. According to new research, this planet’s ancient active volcanism may be related to an extended magma plumbing system in Mars. The big Martian volcano is a part of it. The new research also suggests that a complex magma system on Mars controlled how the planet’s crust was built and how it deformed. Moreover, such a system would influence the geological, atmospheric, hydrological, and biospheric processes.
The Oxford scientists said that understanding how complex crusts formed in the absence of tectonic plates also helps to think about the rocky planets beyond our solar system in our galaxy.
Conclusion
Mars may seem like a cold and desolate wasteland for now, but what about several years ago? It seems Mars has a deep and dark past, based on the magma system on Mars existed under the surface for years. Complex magmatic processes makes the magma system on Mars so intriguing because new evidence tells that they have taken place outside of plate tectonics. This is surprising because, according to the text, Mars had no Earth-like plate tectonics. However, scientists are certain that the process of mantle upwelling and magma intrusion, years ago, provided the necessary heat to form the magma system.
The magma system on Mars is a great discovery because it may provide insight on how Mars transitioned from a “warm” planet to the icy desert that we see today. Further research, including seismic measurements and Mars missions, can provide more information on how large some of these magma systems may have been and what role they may have played in the shaping of Mars’ surface. The magma system on Mars is a gateway to understanding more about Mars, and the secrets it has been keeping for centuries.