Thank you 2. The geosphere is energized mostly by geothermal heat (heat originat

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Thank you
2. The geosphere is energized mostly by geothermal heat (heat originating in Earth's core). Therefore, it is much hotter deep inside Earth than it is near the surface. The geothermal gradient is the rate of temperature increase with depth from Earth's surface. The deepest mine on Earth is located on the African continent (Carletonville, South Africa: FIGURE 1.5). It is 3.9 km deep, and rocks at that depth are 60°C. Assuming that rocks at the surface of the mine are 0°C, what is the geothermal gradient at the mine? Show your work.

Explanation / Answer

Density of the rock = 3000 kg/m^3
Gravity = 10 m/s^2
Pressure = Depth x Density x Gravity

Pressure=3.9*3000*10=117000

Temp = Geothermal Gradient x Depth

Geothermal Gradient =Temp/Depth

=60/3.9

=15.3

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