AVO Logo
Site Map | FAQ |
Alaska Volcano Observatory
 
You are here: Home > Samples > 84Au-9

SAMPLE INFO : 84Au-9
Sample ID:84Au-9
Station ID:84Au-9
Latitude:59.361568
Longitude:-153.445725
Datum:NAD83
Date Sampled:1984-01-01
Sample Type 1:Lava
Sample Type 2:Dome
Text Description:
Massive, porphyritic sample of prehistoric Dome H. Phenocrysts of plagioclase, hypersthene, augite, and minor olivine and hornblende. Hornblende is opacite-rimmed and also may be rimmed by a fine-grained intergrowth of plagioclase+Fe-Ti oxide + orthopyroxene. Groundmass is holocrystalline and composed of plagioclase microlites, Fe-Ti oxides, and pyroxenes.

References:
Petrology, geochemistry, and the evolution of magmas from Augustine Volcano, Alaska

GEOCHEM DATA