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 + waterchlorite + quartz → kyanite + talc + waterEpidotisation in Argyll and Bute , U.K
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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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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
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