The mineral properties are temperature-dependent, so the geotherm must also be determined.
2.
A line tracing the gradient through the planetary body is called a "'geotherm "'on Earth and other terrestrial planets.
3.
Throughout the rheological boundary, the geotherm gradually transitions from the conductive nature of the lithospheric geotherm to the convective ( adiabatic ) nature of the underlying asthenosphere.
4.
Throughout the rheological boundary, the geotherm gradually transitions from the conductive nature of the lithospheric geotherm to the convective ( adiabatic ) nature of the underlying asthenosphere.
5.
In Scholz's model for a quartzo-feldspathic crust ( with a geotherm taken from Southern California ), the brittle semibrittle transition starts at about 11 km depth with an ambient temperature of 300 �C . The underlying alternating zone then extends to roughly 16 km depth with a temperature of about 360 �C . Below approximately 16 km depth, only ductile shear zones are found.
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