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Nilanjan Bhowmick AIR 3, CSIR NET (Earth Science)
Gurmeet Singh posted an Question
October 10, 2020 • 16:34 pm
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30 points
30 points
- IIT JAM
- Geology (GG)
Sir, how is the temperature increases on going to depth within the crust. as well in mantle is the rate in increasing consistent?
sir, how is the temperature increases on going to depth within the crust.
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Sajan sarthak Best Answer
As crust is full of radioactive elements their dacay gives us much more heat inside it. and also the primordial heat present in Earth from the beginning of formation thats why Earth has still a hot molten core inside it and that convection gives the geothermal temperature. And with depth the temperature increases called geothermal gradient. But the geothermal gradient is steep in crust means temperature rises so intensely in less depth. and in mantle it has a gradual slope less than crust slope so it is as well increasing but in a gradual manner with depth.
sir can we analyse this only in crust or with 100 km depth.
as i have read somewhere temp. increase one degre with 30km depth. ?
Geothermal gradient is the rate of increasing temperature with respect to increasing depth in Earth's interior. Away from tectonic plate boundaries, it is about 25–30 °C/km
sir is it consistent downwards
consistent means constant no it's not it's increasing
means this gradient you told 25-30°C /km is different at deeper crust.
yes of course
deeper crust means in the upper part of upper mantle