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Traces of Earth’s primordial magma ocean spotted in lava Christa Lesté-Lasserre AN UNDERWATER volcano off the coast of Madagascar has been spewing chemical traces of material from a primordial magma ocean in the first 100 million years of Earth’s history. Scientists generally suspect that Earth’s mantle – the thick layer of hot rock beneath the crust – has been churning for more than 4 billion years, erasing most chemical traces of the planet’s earliest history. During the Hadean Aeon, a Mars-sized object collided with Earth, breaking off debris that scientists believe later formed the moon. The impact heated the young planet so intensely that it became covered by a global magma ocean. …
摘自《新科学家》(New Scientist)第3603期 · 2026年7月11日。仅引用开头一小段供了解文章,版权归原刊所有,全文请阅读原刊。