Magma storage and mixing conditions for the 1953-1974 eruptions of Southwest Trident volcano, Katmai National Park, Alaska
Coombs ML, Eichelberger JC, Rutherford MJ. 2000. Magma storage and mixing conditions for the 1953-1974 eruptions of Southwest Trident volcano, Katmai National Park, Alaska. Contributions to Mineralogy and Petrology. 104(1):99-118
Between 1953 and 1974, approximately 0.5 km³ of andesite and dacite erupted from a new vent on the southwest flank of Trident volcano in Katmai National Park, Alaska, forming an edifice now known as Southwest (or New) Trident. Field, analytical, and experimental evidence shows that the eruption commenced soon after mixing of dacite and andesite magmas at shallow crustal levels. Four lava flows (58.3-65.5 wt% SiO2 ) are the dominant products of the eruption; these contain discrete andesitic enclaves (55.8-58.9 wt% SiO2 ) as well as micro- and macro-scale compositional banding
- Type
- Journal Article
- Authors
- Coombs, Michelle; Eichelberger, John; Rutherford, Malcolm
- Units
- KATM
- Keywords
- Alaska, Alaska Peninsula, Katmai National Park And Preserve, Lava Flow, Magma Storage, Mount Katmai, Southwest Trident volcano, Volcano