The Moon is virtually identical in composition to the Earth, leading these researchers to believe it was blasted out of the Earth by a nuclear explosion, rather than spalling off after a massive object crashed into the Earth, says this article on Physorg.com.
31 Jan 10 – “Dutch scientists Rob de Meijer (University of the Western Cape) and Wim van Westrenen (Amsterdam’s VU University) think centrifugal forces concentrated heavy elements like thorium and uranium on the equatorial plane and at the Earth core-mantle boundary. If the concentrations of these radioactive elements were high enough, this could have led to a nuclear chain reaction that became supercritical, causing a nuclear explosion.”
“The Earth basically became a natural nuclear georeactor that exploded and ejected into orbit the lunar-sized blob that became the Moon.”
Georeactors are known to have existed on Earth, such as that at Oklo in the Republic of Gabon in Western Africa, which was operating between 2.0 and 1.5 billion years ago.
I write about the natural nuclear reactions at Oklo in “Magnetic Reversals and Evolutionary Leaps” (p 140).
I also speak of natural nuclear reactions in Saskatchewan (The Carswell structure), in Alberta (Steen River), in Ontario (Sudbury), in South Africa (Vredefort Dome), in Germany (Ries Crater), and in the United States (the Decaturville structure).
See entire article:
More information: http://arxiv.org/abs/1001.4243