Sample: 84Au-103

Sample ID:	84Au-103 ^[1]
Station ID:	84Au-103
AT Num:
Volcano:	Augustine
Possible source:
Eruption:	Augustine 1883/10
Collector:	Daley, E. E.
Date sampled:	1984-01-01
Sample type 1:	Lava
Color:
Final unit:
Text Description:	Sample from short lava flow, possibly 1883. Plagioclase, hypersthene, augite, olivine, and relict hornblende phenocrysts in a holocrystalline groundmass of plagioclase microlites, pyroxenes, and Fe-Ti oxides. Hornblende is completely recrystallized to fine-grained Fe-Ti oxide+plagioclase+pyroxene. Olivine is surrounded by a faint dusty rim. Groundmass contains lighter patches or bands with similar mineralogy to the rest of the groundmass but having a smaller proportion of Fe-Ti oxide.
Sample Location:

References Cited

[1] Petrology, geochemistry, and the evolution of magmas from Augustine Volcano, Alaska, 1986

Daley, E. E., 1986, Petrology, geochemistry, and the evolution of magmas from Augustine Volcano, Alaska: University of Alaska Fairbanks unpublished M.S. thesis, Fairbanks, AK, 103 p.

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