Title: Pyroxene relations in two Hawaiian hypersthene-bearing basalts
Abstract: Summary A preliminary account is given of an optical and electron-microprobe investigation into the pyroxene relations of Hawaiian hypersthene-bearing lavas. It is shown that the clinopyroxene jackets to the phenocryst hypersthenes consist of strongly zoned augite, not pigeonite as formerly believed; the compositional range of this pyroxene is approximately the same as that of the groundmass augite phase. Groundmass pyroxene relations are complex; in one case two distinct pyroxene phases, augite and pigeonite occur, in the other all compositions lying between augite and pigeonite are encountered.
Publication Year: 1965
Publication Date: 1965-01-01
Language: en
Type: article
Indexed In: ['crossref']
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Cited By Count: 8
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