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
Epidotisation in Argyll and Bute, U.K
^"Types of Metamorphic Reactions". Tulane University. Retrieved 2007-06-22.
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A metamorphicreaction is a chemical reaction that takes place during the geological process of metamorphism wherein one assemblage of minerals is transformed...
experimentally derived metamorphicreactions at their pressure and temperature conditions for a given rock composition. This allows metamorphic petrologists to...
Metamorphic rocks arise from the transformation of existing rock to new types of rock in a process called metamorphism. The original rock (protolith)...
A metamorphic facies is a set of mineral assemblages in metamorphic rocks formed under similar pressures and temperatures. The assemblage is typical of...
index mineral (the place where a metamorphicreaction is observed) forms an easily recognizable isograd. A metamorphic zone is the region between two such...
quartz in blueschist and eclogite metamorphism by the following metamorphicreaction: chlorite + quartz → kyanite + talc + water Talc is also found as...
and early 1900s, George Barrow discovered the classic Barrovian-type metamorphic sequence in the southeastern Scottish Highlands. It represents a common...
rocks in the presence of water and carbon dioxide as a prograde metamorphicreaction. The partial pressure of carbon dioxide (XCO2) in aqueous solution...
dehydration reactions occur, is key to interpreting mantle melting, volcanic arc magmatism, and the formation of continental crust. A metamorphic facies is...
igneous rocks, it can also include metamorphic and sedimentary processes, including diagenesis and metamorphicreactions. Petrogenesis of an igneous rock...
common and widely distributed type of metamorphic rock. It is formed by high-temperature and high-pressure metamorphic processes acting on formations composed...
mineral monazite. It is a powerful tool in studying the complex history of metamorphic rocks particularly, as well as igneous, sedimentary and hydrothermal...
back into quartz with a consequent volume increase, although the metamorphicreaction is very slow at the low temperatures of the Earth's surface. The...
Because metamorphism usually requires water in order to facilitate metamorphicreactions, metamorphism nearly always occurs with metasomatism. Further, because...
type produced by weathered ultramafic rock such as peridotite and its metamorphic derivatives such as serpentinite. More precisely, serpentine soil contains...
carbon dioxide within metamorphic fluids, as well as by the composition of the host rock. In a general sense, talc carbonate metamorphic assemblages are diagnostic...
is a typically blue aluminosilicate mineral, found in aluminium-rich metamorphic pegmatites and sedimentary rock. It is the high pressure polymorph of...
015. Nabelek, Peter I. (2007). "Fluid evolution and kinetics of metamorphicreactions in calc-silicate contact aureoles—From H2O to CO2 and back". Geology...
determined mineral or mineral-assemblage stability ranges are plotted as metamorphicreaction boundaries in a pressure–temperature cartesian coordinate system...
Migmatite is a composite rock found in medium and high-grade metamorphic environments, commonly within Precambrian cratonic blocks. It consists of two...
pressure of carbon dioxide within the metamorphic fluid, called the XCO2. If XCO2 is above 0.5, the metamorphicreactions favor formation of talc, magnesite...
Serpentinite is a metamorphic rock composed predominantly of one or more serpentine group minerals formed by near to complete serpentinization of mafic...
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