The Bowen\'s Discontinuous Reaction series involves continuously with falling te
ID: 153736 • Letter: T
Question
The Bowen's Discontinuous Reaction series involves continuously with falling temperatures. O True O False mafic minerals, where the reactions occur at specific temperatures. Continuous Reaction series involves the mineral plagioclase, where the reactions occur QUESTION 4 In the chemical evolution of magma, there are internal and external processes. Internal processes include: magma fixing and assimilation. While external processes include: fractionation, and crystal settling. O True False 10 QUESTION 5 What does the viscosity of magma depend on? Temperature, chemical composition, and volatile content. Temperature The rate at which the magma formed The place at which the magma formed.
Explanation / Answer
Answer 3 : TRUE.
Explanation : In the Bowen's Reaction series, the continuous series describes and explains the evolution of the plagioclase feldspars as they evolve from being calcium-rich to more sodium-rich with continuously falling temperature conditions. On the other hand, the discontinuous series describes the formation of the mafic minerals such as olivine, pyroxene, amphibole, and biotite mica, each at a definite temperature.
Answer 4 : False.
Explanation : Crystal settling and fractionation are a part of fractional crystallization and they are internal processes.
Answer 5 : Temperature, chemical composition and volatile content.
Explanation : Viscosity of a given magma increases with increasing silica content, decreasing temperature and decreasing volatile content.
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