New research explains how the Moon's magma ocean cooled as a slushy mixture. That explains some contradictory evidence in lunar samples.
A collision between two protoplanets created the Moon. One of the protoplanets became the Earth, and the smaller one became the Moon. After the crash, the Moon heated up so much that the entire mantle was molten. Geologists call this a magma ocean.
But there are problems with that explanation, and a pair of scientists think they have a better answer. They’ve presented their work in a paper titled “.” The A.G.U.’s Geophysical Letters published the paper by researchers Chloé Michaut and Jerome A. Neufeld. So what happened in the ancient magma ocean to create these heterogenous anorthosites in the lunar highlands?
“Given the range of ages and compositions of the anorthosites on the Moon, and what we know about how crystals settle in solidifying magma, the lunar crust must have formed through some other mechanism,” said co-author Professor Jerome Neufeld from Cambridge’s Department of Applied Mathematics and Theoretical Physics.
In this scenario, the surface of the slurry cools faster than the interior. The result is the anorthite-rich crust we see in the lunar highlands and a more well-mixed, slushy interior.
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