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Minerals form from the magma through different
processes. One process starts with magma and first formed minerals
remove hornblende, augite and plagioclase from the brew. The remaining
melt will have the ingredients to form lighter colored minerals like
orthoclase and quartz. Dr. N.L. Bowen in the early 1900's of the
Geophysical Labs in Washington, D.C. discovered this order of crystallization.
This chemical explanation is called the Bowen reaction series.
Another process that forms minerals is the melting
of different rocks. In areas where magma is formed in a
subduction zone, the original melt has a higher concentration of
sedimentary rocks and water. This mixing of other continental rock can
influence how the minerals are created.
Bowen Reaction Series
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