New Evidence Shows Earth's Mantle Chemistry Has Remained Stable for Billions of Years

Smithsonian researchers' analysis of ancient rocks reveals consistent oxidation levels, challenging previous theories of geologic change.

Ancient rocks from Gakkel Ridge and Southwest Indian Ridge show low oxidation levels, indicating extreme melting in the Archean Eon.
The study suggests Earth's mantle has retained a stable oxidation state for over 2.5 billion years.
Findings challenge previous theories that proposed significant oxidation events in Earth's mantle history.
The research highlights the importance of high-temperature conditions in preserving the chemical signatures of ancient mantle rocks.
The study contributes to understanding Earth's early geologic processes and the formation of its unique environment.