月球也会“生锈”？

Core Insights - The research team has made a significant breakthrough in lunar science by discovering micron-sized hematite (α-Fe2O3) and magnetite (γ-Fe2O3) crystals from samples collected by the Chang'e 6 mission, revealing a new oxidation reaction mechanism on the Moon [1][3][5] Group 1: Research Findings - The formation of hematite is closely related to large impact events in the Moon's history, which create a high oxygen fugacity gas environment that oxidizes iron, leading to the formation of micron-sized crystalline hematite particles [5] - The intermediate products of this reaction include magnetic magnetite and magnetite, which may serve as mineral carriers for the magnetic anomalies at the edge of the South Pole-Aitken Basin [5] - This study provides the first evidence of strong oxidizing substances like hematite existing on the lunar surface under a highly reducing background, shedding light on the Moon's redox state and the causes of magnetic anomalies [5] Group 2: Mission Context - The South Pole-Aitken Basin, where the Chang'e 6 mission landed, is known as the largest and oldest impact basin on rocky bodies in the solar system, providing a unique setting for exploring special geological processes [6] - The successful collection of lunar samples from the interior of the South Pole-Aitken Basin in 2024 laid the groundwork for this groundbreaking discovery [6]