closure temperature
nounEtymology Coined 1973 by Martin H. Dodson.
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Geography, Geology, Natural sciences The temperature, of a mineral, etc., below which there is no significant diffusion of isotopes into the external environment; the temperature of said mineral at the time it was formed (as calculated by radiometric dating).
- The relationship between the closure temperature of a mineral and its cooling history can be put onto a more rigorous footing by the use of some thermodynamics.1990, C. M. R. Fowler, The Solid Earth, Cambridge University Press, page 199:
- Dodson (1973) introduced the term closure temperature, which he defined as the temperature of the thermochronological system at the time t#95;c corresponding to its apparent age (cf. Figure 2.1). The closure temperature, which by definition lies between the open-system and blocking temperatures, provides the simplest conceptual entity to which a thermochronological age can be related.2006, Jean Braun, Peter van der Beek, Geoffrey Batt, Quantitative Thermochronology, Cambridge University Press, page 23:
1 more example
- 2020, Barbara A. Romanowicz, Seismic Tomography of the Earth's Mantle, David Alderton, Scott A. Elias (editors-in-chief), Encyclopedia of Geology, Volume 1, 2nd Edition, Academic Press, page 606, As the closure temperature varies for every mineral and isotopic system, a system can be closed for one mineral at some temperature but open for another.