3 ms·
> The completed tunnel travels up to 2.3 km below the surface of the mountains above and through rock that reaches temperatures of 46C. Is this solely because
by rplnt 10y ago
> The completed tunnel travels up to 2.3 km below the surface of the mountains above and through rock that reaches temperatures of 46C.
Is this solely because of the pressure or is there something else (say water?)?
Also, I think they forgot degrees (°).
- danieltillett 10y agoRadioactive decay.
- jacquesm 10y agoGeothermal heat, more likely, or did I miss something?
- goodcanadian 10y agoGeothermal heat is due to radioactive decay in the earth's core, so you're technically both correct.
- jacquesm 10y agoRadioactive decay is a component of geothermal heat, but it is not all of it, quite a large chunk of it is simply residual heat from time of the formation of the planet.
- danieltillett 10y agoI am not sure how much residual heat is left after 4 billion years, but at the near surface all[1] the heat is due to radioactive decay. 1. Ok most :)
- jacquesm 10y agohttps://en.wikipedia.org/wiki/Earth%27s_internal_heat_budget https://en.wikipedia.org/wiki/Earth%27s_internal_heat_budget "The flow of heat from Earth's interior to the surface is estimated at 47 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 the Earth."
- danieltillett 10y agoFrom the wiki article you quote. Most of the heat flow from the thicker continental crust is attributed to internal radiogenic sources, in contrast the thinner oceanic crust has only 2% internal radiogenic heat. In the Swiss alps most of the heat is coming from local radioactive decay.