Large mass of granite unexpectedly detected on Moon
Using archival data from four lunar orbiters (two American and two Chinese), researchers have unexpectedly detected evidence suggesting the existence of a large 20-mile-wide mass of granite under a lunar volcanic caldera.
“We have discovered extra heat coming out of the ground at a location on the Moon believed to be a long dead volcano which last erupted over 3.5 billion years ago. It’s around 50km across, and the only solution that we can think of which produces that much heat is a large body of granite, a rock which forms when a magma body – the unerupted lava – below a volcano cools. Granite has high concentrations of radioactive elements like uranium and thorium compared to other rocks in the lunar crust, causing the heating we can sense at the lunar surface”.
Except for some small grains found in Apollo lunar samples, granite has not been found anywhere in the solar system except on Earth. This discovery, if confirmed, will strengthen the theory that the Moon was once part of the Earth and was created from the impact of a second large body.
Using archival data from four lunar orbiters (two American and two Chinese), researchers have unexpectedly detected evidence suggesting the existence of a large 20-mile-wide mass of granite under a lunar volcanic caldera.
“We have discovered extra heat coming out of the ground at a location on the Moon believed to be a long dead volcano which last erupted over 3.5 billion years ago. It’s around 50km across, and the only solution that we can think of which produces that much heat is a large body of granite, a rock which forms when a magma body – the unerupted lava – below a volcano cools. Granite has high concentrations of radioactive elements like uranium and thorium compared to other rocks in the lunar crust, causing the heating we can sense at the lunar surface”.
Except for some small grains found in Apollo lunar samples, granite has not been found anywhere in the solar system except on Earth. This discovery, if confirmed, will strengthen the theory that the Moon was once part of the Earth and was created from the impact of a second large body.