Teghaza 001 Reveals 4.1-Billion-Year-Old Mars Water History, Opening 13 Possible Source Sites
Updated
Updated · Space.com · Nov 6
Teghaza 001 Reveals 4.1-Billion-Year-Old Mars Water History, Opening 13 Possible Source Sites
3 articles · Updated · Space.com · Nov 6
Summary
Teghaza 001—a 1.8-pound Martian meteorite found in Mali in 2022—preserves evidence that water altered Mars’ crust about 4.1 billion years ago, making it one of the three oldest Martian meteorites known.
Researchers said its unusual mix of igneous minerals and textures offers the first sample of Martian crust from a previously unsampled region, with chemistry resembling terrain in Mars’ southern highlands.
Using oxygen isotopes, zircon crystals and a rubidium-strontium dating method applied for the first time to an ancient Martian meteorite, the team identified 13 possible places on Mars where it may have formed.
The findings point to a more dynamic early Martian water cycle—liquid water interacting with crustal rocks and possibly recording atmospheric loss—and suggest the dating technique could unlock more clues from other Mars samples.