Giant mantle plume reveals Mars is more active than previously thought

A recent study published in Nature Astronomy challenges long-held assumptions about Mars, revealing that the planet may be more geologically active than previously thought. Scientists from the University of Arizona discovered evidence of a large, active mantle plume beneath the Martian surface, which is causing tectonic and volcanic activity in the Elysium Planitia region.

Mantle plumes are columns of hot, buoyant rock that rise from deep within a planet, influencing surface features through uplift, faulting, and volcanic eruptions. On Earth, these plumes are responsible for features like the Hawaiian Islands. However, it was previously thought that Mars, being smaller and colder, lacked such activity.

The research focused on Elysium Planitia, an area in Mars' northern lowlands that has seen significant volcanic and seismic events in the last 200 million years. The team found that the region's surface has been uplifted by more than a mile, and gravity data suggest this uplift is supported by deep structures consistent with a mantle plume.

Additional evidence includes tilted crater floors and tectonic patterns that align with the presence of a massive plume, estimated to be 2,500 miles wide. This plume is thought to be responsible for the formation of the Cerberus Fossae, a system of fissures that has been the source of recent marsquakes detected by NASA's InSight mission.

The findings challenge existing models of Mars' thermal evolution and suggest that the planet's interior is more dynamic than previously assumed. The study highlights the need for future research to incorporate the presence of such a large, unexpected mantle plume in understanding the geological history of Mars.