What Two Ancient Meteorites Reveal About Mars and the Birth of the Solar System

Two meteorites are extending the physical record of planetary history in opposite directions. The Martian shergottite NWA 13441 records volcanic activity around 1.273 billion years ago, an interval largely missing from the known shergottite record. Meanwhile, microscopic inclusions in the Antarctic meteorite DOM 08006 preserve evidence of magnetism during the Solar System’s first 200,000 years. 13

The results do not rewrite planetary formation as a choice between gravity and magnetism. Instead, they add evidence that both processes mattered—and that ancient material can preserve clues from periods that are otherwise difficult to reconstruct.

NWA 13441 fills Mars’s “meteorite gap”

NWA 13441 was recovered in Algeria in 2019 and identified as an olivine-phyric shergottite, a type of igneous meteorite known to come from Mars. Researchers dated its crystallization to approximately 1.273 billion years ago. 213

That age falls between two better-represented groups of shergottites: most known samples are younger than about 600 million years, while the next-oldest dated examples are around 2.4 billion years old. NWA 13441 therefore provides the first known shergottite evidence for Martian magmatic activity within a roughly 1.8-billion-year gap in the sample record. 13

The gap does not mean Mars was geologically inactive throughout that entire period. It means scientists had lacked this particular kind of physical sample from the interval. NWA 13441 gives researchers a new anchor for reconstructing when and how Mars produced volcanic rocks during its middle history.

Its neodymium signature points deeper into Mars

The meteorite is unusual not only because of its age, but also because of its isotopes. Its initial neodymium composition is close to the chondritic value associated with primitive material from the early Solar System. That differs from the signatures measured in previously studied shergottites. 713

The leading interpretation is that the magma came from a distinct Martian mantle reservoir that had not undergone the same chemical reworking as the sources represented by other shergottites. In practical terms, NWA 13441 may have sampled a deeper part of Mars that retained a composition inherited from the planet’s earliest formation. 113

This is an interpretation, not a direct photograph of Mars’s interior. Isotope patterns can identify relationships between reservoirs, but they do not by themselves establish the reservoir’s exact depth or prove that it remained completely untouched. Still, the result is consistent with the idea that Mars preserved isolated primordial material more effectively than Earth, whose active plate tectonics continually recycle its crust and uppermost geological record. 13

DOM 08006 preserves a magnetic record from the Solar System’s beginning

The second study looks much farther back in time. MIT researchers examined calcium-aluminum-rich inclusions, or CAIs, embedded in DOM 08006, a meteorite recovered from Antarctica. CAIs are among the oldest known Solar System solids and formed within roughly the first 200,000 years after the Solar System began taking shape.

The inclusions contain remanent magnetic signals indicating that a substantial magnetic field existed in the early solar nebula. The reported paleointensity estimates are roughly 150–600 microtesla.

That finding matters because the early Solar System was not simply a cloud collapsing under gravity. As gas and dust moved inward, the material also had to lose angular momentum. Magnetic fields interacting with ionized gas can help transport that angular momentum and drive accretion through the developing disk.

The meteorite evidence therefore supports a model in which magnetism helped organize the disk, feed material toward the growing Sun, and influence the environment from which planets eventually formed. It does not show that magnetic fields replaced gravity or single-handedly created the Sun and planets; it indicates that magnetism was likely an important accompanying process.

One lesson connects both studies

The Mars and Solar System findings address different timescales, but they share a broader scientific message: the planetary record is incomplete, and small samples can reveal events that remote observation cannot.

NWA 13441 supplies a missing time point in Mars’s volcanic history and hints at chemical reservoirs preserved deep inside the planet. DOM 08006 reaches even farther back, showing that the earliest disk already carried a magnetic field capable of influencing how material moved.

Together, the studies make two cautious but significant contributions. Mars appears to have retained at least some chemically distinctive ancient material, while the newborn Solar System was governed by more than gravity alone. Both conclusions remain open to refinement as additional meteorites and laboratory measurements become available.