By Lou Farrell, Senior Writer, Red Planet Bound
Eventually, humans will make their way to another planet, and harvesting Mars’ resources is an inevitable part of the colonization process. People can only sustain building and living operations on the Red Planet if there is a reliable flow of materials. It may require a logistics setup unlike anything on Earth, especially for the most complex industries.
Fortunately, experts already have a few frameworks that could inspire success beyond the blue marble.
Mining and Resource Extraction Techniques for Mars
Several missions have already attempted to determine how to sustain machinery on the way to Mars, including the most recent Artemis II mission. Every rover and spacecraft’s insights will culminate in the technologies that will obtain what humans need to stay alive in the depths of space. These could be some of the most lucrative and reliable.
Water Ice Mining
Water is the most important resource for humans to find on the way to Mars, on the Moon and throughout the planet itself. It is the cornerstone of life support, providing hydration and sanitation methods and growing food using equipment such as hydroponics. However, it is also vital for electrolysis, which can provide a source of fuel for rocket propellant.
Finding ways to harvest water from ice is critical for jettisoning the first humans to the Red Planet and ensuring their safe return. With advanced water ice mining, it could even support deeper space exploration.
In 2015, NASA held a discussion at the First Landing Site/Exploration Zone Workshop for Human Missions to the Surface of Mars to determine how many metric tons the project would need to be sustainable. The only alternative is to transport water from Earth to the astronauts, which would be prohibitively expensive.
Regolith Mining for Construction
Regolith is loose rock, soil and dust that rests above bedrock. It exists on Earth, the Moon, Mars and many other planetary bodies. Because it is loose, it could be the foundation for everything, including housing and landing pads.
It could even be used for radiation protection, safeguarding residents from the Sun. Much like water, bringing materials from Earth would be far too expensive and heavy to justify, requiring a little bit more ingenuity to establish a settlement.
Metal Extraction From Regolith
Regolith is rich in many metals, including iron. With sufficient infrastructure or techniques like carbothermal reduction, Martian settlements could eventually manufacture alloys by extracting these elements from regolith. This ability is critical for establishing long-term settlements on Mars because they strengthen existing buildings and enable the construction of complex machinery.
Hydrated Mineral Mining
While ice is the most accessible way to obtain water, mineral mining is another strategy. Hydrated materials like clay are chemically bound to water, and heating them would release this moisture for scientists to capture. Using this as an alternative to water ice mining is essential for resilience.
Residents need multiple ways to access this vital element, so as not to overextract what is available. With hydrated minerals more widely distributed throughout the planet rather than localized to the polar ice caps, they provide a useful supplement to more lucrative water-extraction methods.
Atmospheric Resource Utilization
The Martian atmosphere is thick with carbon dioxide. Astronauts could pull the oxygen from the atmosphere to keep everyone alive. This element is crucial for life support systems, but it can also be used as rocket propellant.
This idea has already been successfully tested by NASA’s Mars Oxygen In-Situ Resource Utilization Experiment. This small instrument is connected to the Perseverance rover. It generated 122 grams of oxygen from 2021 to 2023. With more advancements to increase capacity, the compressor could enable life on Mars without fear, eventually producing a self-sufficient and stable environment.
Precious and Industrial Mineral Mining
There are many other Mars resources worth uncovering in its crust, including:
- Calcium
- Magnesium
- Iron
- Aluminum
- Potassium
There are also rare-earth metals like cerium and yttrium that the Perseverance rover has uncovered. These will be valuable for creating energy technologies and long-term industrial infrastructure.
Powering Martian Mining Operations
Martian residents need multiple power sources to use all the materials they harvest, and several have been proposed as the most effective and sustainable.
Nuclear Fission
Fission will be the backbone of power infrastructure in space, as evidenced by the Fission Surface Power project’s success in demonstrating its reliability and longevity as a power supply. It will be accessible on the Red Planet as small, plug-and-play reactors. The design is critical for making energy transportable, deployable and scalable. If power infrastructure takes too long or is too complicated to install, it may not support residents long enough to build out a society.
Microreactors are becoming increasingly capable, suggesting a future on Mars where energy resources operate autonomously. This ability makes it safer for humans to work around power technologies. Space Reactor-1 Freedom uses fission for nuclear propulsion, enabling faster space travel and reducing radiation exposure.
Three-Phase Power and a Martian Grid
An uninterruptible power system with three-phase power delivers greater efficiency than single-phase options, which are most commonly found in standard homes. It can handle between 10 and 1,100 kilovolt-ampere, supporting the power-hungry processes on Mars settlements. A three-phase system with an established grid could power the mining and industrial sectors while supporting long-distance energy transmission.
Solar Power and Energy Storage
Solar is one of the most obvious options for a complementary and renewable power source. While Martian dust could reduce efficacy, advancements in self-cleaning technologies and dust-mitigation materials have made it possible to imagine solar arrays on the planet. Some panels periodically vibrate to shake off debris, or they use electrostatic components to clear it away.
Combining this with energy storage is the safest opportunity to solidify energy independence and resilience on Mars. These fuel cells or batteries could capture excess generation, storing it for emergencies or during peak hours. It could also protect residents from climatic extremes, including torrential dust storms.
Hybrid Power Systems
Ultimately, a Martian power grid must have multiple energy sources, forcing astronauts to build a hybrid system. It could leverage the strengths of many energy technologies, powering diverse structures and machinery across the settlement. It would be responsible for establishing a reliable baseload of electricity while using storage to meet higher demands.
Building even one source of constant electricity may seem like the priority for those who land on Mars, but multiple projects must happen simultaneously. Long-term success requires these individuals to eliminate dependence on a single method. If one of the sources fails, then others can still deliver electricity to essential, lifesaving systems until the rest of the grid comes back online.
The starting years of developing the initial Mars colony will need immense amounts of constant power, as developing infrastructure that solidifies stability will take a long time. Establishing redundancy early will be key to preventing the total failure of the first permanent project.
The Reality of Power on Mars
Discovering how to harvest resources on Mars is pivotal because it predicts how well colonization efforts will go and the likelihood that humanity will go beyond the Red Planet in the future. The materials Mars contains and the technologies used to leverage them will lay the foundation for future space living and travel.
Every method reveals an opportunity to commit to more well-researched science until venturing into the stars becomes safer and viable.
Author’s Personal Note: This article was partly inspired by a recent home power outage I experienced. Electrical crews were able to solve the issue before too long, but it got me thinking about how much more critically important something like that would be on Mars. And then, rather naturally, that line of thinking led me to a ton of great research, and eventually this article you’ve just finished reading!
[Images: NASA / Pat Rawlings]
