DEFINITION OF GEOTHERMOMETRY

One of the aims of metamorphic petrology

is to determine the temperature at which minerals in the

rock grew and, ultimately, to determine the history of temperatures

through which rock has passed. Such knowledge

is important for understanding the Earth’s temperature

structure and the effects of temperature on physical and

chemical processes, including volcanic and metamorphic

processes. Geothermometry is often aimed at determining

the pressure-temperature-time history of a specific rock

mass, so that its mineral or hydrocarbon potential can be

assessed, since specific minerals and hydrocarbon deposits

are only formed and preserved in very limited ranges of

temperature. Other geothermometry studies are aimed at

understanding tectonic and metamorphic processes, since

the temperature history of rock masses is expected to be different

in different tectonic settings.

See also HYDROCARBON; METAMORPHISM; PLATE TECTONICS.

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