Metamorphic reaction
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![](https://upload.wikimedia.org/wikipedia/commons/thumb/9/96/Metamorphic_reaction_EN.svg/350px-Metamorphic_reaction_EN.svg.png)
Schematic representation of a metamorphic reaction. Abbreviations of minerals: act = actinolite; chl = chlorite; ep = epidote; gt = garnet; hbl = hornblende; plag = plagioclase. Two minerals represented in the figure do not participate in the reaction, they can be quartz and K-feldspar. This reaction takes place in nature when a mafic rock goes from amphibolite facies to greenschist facies.
A metamorphic reaction is a chemical reaction that takes place during the geological process of metamorphism wherein one assemblage of minerals is transformed into a second assemblage which is stable under the new temperature/pressure conditions resulting in the final stable state of the observed metamorphic rock.[1]
Examples include the production of talc under varied metamorphic conditions:
- serpentine + carbon dioxide → talc + magnesite + water
- chlorite + quartz → kyanite + talc + water
![](https://upload.wikimedia.org/wikipedia/commons/thumb/5/50/Epidotisation_-_geograph.org.uk_-_2979796.jpg/350px-Epidotisation_-_geograph.org.uk_-_2979796.jpg)
Epidotisation in Argyll and Bute, U.K
Polymorphic Transformations
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Exsolution Reactions
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Devolatilization Reactions
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Continuous Reactions
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Ion Exchange Reactions
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Oxidation/Reduction Reactions
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Reactions Involving Dissolved Species
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Chemographics
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Petrogenetic Grids
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Schreinemakers Method
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Reaction Mechanisms
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See also
Notes
- ^ "Types of Metamorphic Reactions". Tulane University. Retrieved 2007-06-22.
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