Primordial Earth Crust

Hadean Protocrust Redefined: A new study challenges the established understanding of when plate tectonics began.

Early Chemical Signatures: Researchers found chemical signatures previously linked to plate tectonics were present in the Hadean protocrust, Earth’s earliest crust.

Hadean Eon Setting: The Hadean Eon (4.6 to 4 billion years ago) featured a partially molten surface, intense volcanic activity, and meteorite bombardment.

Crust Formation: As the magma ocean cooled, a flaky, unstable crust formed, with thicker sections evolving into proto-continents.

Plate Tectonics Questioned: The study suggests that processes other than plate subduction may have created these signatures in the early Earth.

Research Methodology: The study combined models and laboratory research.

Need for Validation: Independent research is needed to validate the study’s findings.

Study Lead: Macquarie University in Australia led the international research team.

Importance of Hadean Protocrust: Understanding the Hadean protocrust provides insight into early Earth formation, crustal evolution, and potentially the conditions for early life.

Evidence Location: Evidence of Hadean protocrust is primarily found in zircon crystals from the Jack Hills, Australia.