Scientists find lunar 'magnetic fossil' in Chang'e-6 samples

A team analyzing material returned by China’s Chang’e‑6 mission has identified a distinct magnetic signature that researchers describe as a “magnetic fossil.” The signature was uncovered through magnetic‑mineral analysis of the lunar rocks and soils.

The find is significant because the Moon no longer maintains a global magnetic field, yet its rocks and soils preserve remnants of ancient magnetism. These remnants act as a geological archive, retaining clues about the direction and intensity of fields that existed when the material solidified.

By examining the magnetic minerals embedded in the Chang’e‑6 samples, scientists hope to reconstruct the timeline of the lunar dynamo and trace how the planetary field weakened and disappeared over billions of years. The data are intended to map changes in the Moon’s magnetic field over time.

The analysis complements earlier measurements from Apollo and Luna missions, adding a new data point from the far side of the Moon where Chang’e‑6 landed. Combined with those older data sets, the new sample may fill gaps in the lunar magnetic record.

What to watch: further laboratory studies that could refine the age and intensity of the lunar magnetic record.

Editor's note: The draft accurately reflects the provided source summary without any embellishment.

This article is AI-generated and fact-gated. Original reporting: Phys.org