Question

Identify the sources of Earths internal heat; namely, radiogenic heat and primordial heat.

Answer 1

The flow of heat from Earth's interior to the surface is estimated at 47±2 terawatts (TW) and comes from two main sources in roughly equal amounts: the radiogenic heat produced by the radioactive decay of isotopes in the mantle and crust, and the primordial heat left over from the formation of Earth.

Answer 2

As we know that the sources of heat in the deep earth are as follows:

1) When the planet is accreted the heat will form.

2) Due to denser core material sinking to the center of the planet the frictional heat will produce.

3) Due to the decay of radioactive elements the heat will form.        

• As we know that the radiogenic heat is the heat that is generated by the decay of radioactive isotopes of the elements.
• Due to the source of heat flux over and above the primordial heat in the Earth, the radiogenic heat was investigated.
• Accretional energy and differentiation energy plays a very important role in primordial heat.