Anatexis of mafic crust and high pressure crystallization of andesite

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Experimental work relevant to the origin of andesites is reviewed. Diagrams summarize the phase relations of tholeiite and andesite under various P-T ranges and under dry, water-saturated, and water-undersaturated conditions. The two main controlling factors in the formation of calc-alkaline andesites are: 1) the role of water derived from subducted oceanic crust, and 2) the presence of thickened crust in island arcs and continental margins. -A.H.

Original languageEnglish
Pages (from-to)465-487
Number of pages23
JournalAmerican Society of Mechanical Engineers (Paper)
Publication statusPublished - 1982


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