What is Bowen's Reaction Series?
Terms in this set (11)
Norman L. Bowen
A geochemist who discovered the sequence in which minerals crystallize from a cooling basaltic magma, and proved that removing these crystals would change the composition of the remaining liquid.
Bowen's Reaction Series
Shows the sequence in which minerals crystallize from a cooling mafic magma if the crystals are removed during the cooling process. It demonstrates that it is possible to derive intermediate and sialic magmas from a basaltic parent magma.
Discontinuous reaction series
As temperature falls, the higher-temperature mineral reacts with the magma to produce a completely new mineral when the temperature reaches the crystallization point of the new mineral.
Continuous reaction series
As temperature falls, calcic plagioclase feldspar reacts continuously with the magma to become increasingly sodium-rich.
Composed of calcic plagioclase feldspar, pyroxene and olivine, this is the rock produced by the crystallization of a basaltic magma if no crystals are removed from the melt.
Composed of sodic plagioclase feldspar, hornblende and possibly some biotite, this is the type of rock produced from a mafic magma when the first-forming minerals are removed from the melt during cooling.
Composed of potash feldspar, quartz and muscovite, this is the type of rock that results when all the earlier forming minerals are removed from the mafic parent magma.
The magma with a composition resulting entirely from the melting process, before cooling has begun.
Bowen believed that basaltic magma was the only type of parent magma, and that all other magma compositions were derived from it by fractional crystallization.
The removal of crystals from a silicate melt during cooling changes the composition of the melt. In nature, this happens by crystals settling out of the magma or getting filtered out of the magma.
The tiny amount of magma left after most of it has crystallized and the crystals removed.
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