Alaska Volcano Observatory - The Cold Bay Volcanic Center, Aleutian volcanic arc, II: implications for fractionation and mixing mechanisms in calc-alkaline andesite genesis

THE COLD BAY VOLCANIC CENTER, ALEUTIAN VOLCANIC ARC, II: IMPLICATIONS FOR FRACTIONATION AND MIXING MECHANISMS IN CALC-ALKALINE ANDESITE GENESIS

Brophy, J. G., 1987, The Cold Bay Volcanic Center, Aleutian volcanic arc, II: implications for fractionation and mixing mechanisms in calc-alkaline andesite genesis: Contributions to Mineralogy and Petrology, v. 97, n. 3, p. 378-388.

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167: Major and trace element compositions and modal mineralogy

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* a) MB M-Series Basalt: MA M-Series Andesite: FPA FPK-Series Andesite Major Element and Sr, Ba, and Zr abundances analyzed by ICP at Indiana University. Analyst: Mark Gilstrap. Fe3+/Fe+2 ratios determined by titration. Rb abundances analyzed by flame emission spectroscopy at Indiana University. Analyst: James Brophy. Error estimates (1s, relative percent) based on one set of five replicate analyses: Si (0.60), Ti (1.20), Al (1.00), Fe (1.30), Me (0.50). Mg (0.90), Ca (0.75), Na (3.97), K (1.80), P (9.50), Rb (5.59), Sr (2.40), Ba (2.50), Zr (0.82), V (1.50) *

168: log(fo2/(fo2)NNO) T=1000oC

* Ma M-Series Andesite: FPA FPK-Series Andesite *

169: Calculated silicic endmember SiO2 contents

* Ma M-Series Andesite: FPA FPK-Series Andesite *

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