Actually uranium like heavy radioactive Atom is in the core of the Earth. some small amount of uranium may found near some parts of The Earth near surface due to the process of like subduction or collision of tectonic plate of the Earth, raise deeper layer above sea level and by process of weathering it may expose to the surface of the earth or near it.
So uranium like heavy metals found practically may found at any depth from Eroded mountain to the surface of the Earth or any depth of the Earth in very small amount. majority is at centre of the earth and we are not able to reach at the centre of the Earth.
