Alaska Volcano Observatory - The comparative chemical composition of continental vs. island arc andesites in Alaska

THE COMPARATIVE CHEMICAL COMPOSITION OF CONTINENTAL VS. ISLAND ARC ANDESITES IN ALASKA

Forbes, R. B., Ray, D. K., Katsura, T., Matsumoto, H., Haramura, H., and Furst, M. J., 1969, The comparative chemical composition of continental vs. island arc andesites in Alaska: in Andesite Conference, Eugene and Bend, Oregon, 1968, Proceedings (Internat. Upper Mantle Proj. Sci. Report 16), Oregon Department of Geology and Mineral Industries Bulletin 0065, Andesite conference, Proceedings, Eugene and Bend, Oregon, 1968, p. 111-120.

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255: Chemical composition and molecular norms; Redoubt, Trident and Wrangell andesites

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* Redoubt #2: Cognate hypersthene augite andesite fragment from ejecta of January, 1966, eruptions of Redoubt Volcano. Redoubt #3: Pumice ejected during explosive eruptions of Redoubt Volcano in January, 1966. Trident 1953-54: Hypershtene-augite andesite; from a flow erupted by Trident Volcano during the winter of 1953-54. Wrangell WR2-10a: Hypersthene-augite andesite from the rim of the active crater of Wrangell Volcano. *

SAMPLES

Redoubt #2
Redoubt #3

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