Overview
- The study published in Science Advances this week combines geological mapping and ExoMars Trace Gas Orbiter data to argue that Mars is not fully geologically dead.
- Orbital measurements from the ESA TGO show a seasonal pattern of hydrogen chloride (HCl) in Mars’s atmosphere with atypical early‑summer spikes located above fissures on Alba Mons.
- Field mapping around Alba Mons identified networks of fissures dated at about one million years, which the authors say are unusually recent for Martian volcanism.
- Researchers interpret the co‑location of HCl peaks and young fissures as evidence of latent, or “sleeping,” volcanism and possible hydrothermal circulation, a view the ESA summarized by saying Mars may be asleep rather than dead.
- The result is provisional: confirming magma or hydrothermal activity will require targeted follow‑up observations, in‑situ measurements, and new orbital campaigns, and those tests could steer future missions to search for subsurface habitats.