Closure temperature: Difference between revisions
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In [[radiometric dating]], '''closure temperature''' refers to the temperature at which a system, such as a [[mineral]], has cooled so that there is no longer any exchange of parent or daughter atoms with the external environment. This temperature varies broadly between different minerals and also differs depending on the parent and daughter atoms being considered. |
In [[radiometric dating]], '''closure temperature''' refers to the temperature at which a system, such as a [[mineral]], has cooled so that there is no longer any exchange of parent or daughter atoms with the external environment. This temperature varies broadly between different minerals and also differs depending on the parent and daughter atoms being considered. |
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Revision as of 23:00, 19 January 2009
 | It has been suggested that this article be merged with Blocking temperature and Talk:Closure Temperature#Merger proposal. (Discuss) Proposed since January 2009. |
In radiometric dating, closure temperature refers to the temperature at which a system, such as a mineral, has cooled so that there is no longer any exchange of parent or daughter atoms with the external environment. This temperature varies broadly between different minerals and also differs depending on the parent and daughter atoms being considered.
Table of values
The following are the closing temperatures of certain minerals grouped by the typical dating method with which they are used.
Potassium-argon method
| Mineral | Closure temperature (°C) |
|---|---|
| Hornblende | 530±40 |
| Muscovite | ~350 |
| Biotite | 280±40 |
| Microcline | 130±15 |