What is the meaning of Bowen's reaction series?

Please give me the meaning in less than 75 words.

Tashkent T2011-01-04T02:46:59Z

Favorite Answer

It explains how igneous rocks fractionate as a result of partial melting of an original basaltic source. It results, initially, in rocks becoming increasingly DEPLETED in magnesium & iron. The rocks then becoming increasingly DEPLETED in calcium &, as a consequence, become ENRICHED in sodium, potassium and silica (felsic minerals).

This fractionation is partly due to the lesser density of felsic minerals & partly because they remain in water saturated melts at lower temperatures.

(74 words)

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