A Comparison of gas geochemistry of fumaroles in the 1912 ashflow sheet and on active stratovolcanoes, Katmai National Park, Alaska
Sheppard DS, Janik CJ, Keith TE. 1992. A Comparison of gas geochemistry of fumaroles in the 1912 ashflow sheet and on active stratovolcanoes, Katmai National Park, Alaska. Journal of Volcanology and Geothermal Research. 53(1-4):185-197
Fumarolic gas samples collected in 1978 and 1979 from the stratovolcanoes Mount Griggs, Mount Mageirk and the 1953-68 SW Trident cone in Katmai National Park, Alaska have been analysed and the results presented here. Comparison with recalculated analyses of samples collected from the Valley of Ten Thousand Smokes (VTTS) in 1917 and 1919 demonstrates differences between gases from the short lived VTTS fumaroles, which were not directly magma related, and the fumaroles on the volcanic peaks. Fumarolic gases of Mount Griggs have an elevated total He content, suggesting a more deep crustal or mantle source for these gases than those from the other volcanoes.
- Type
- Journal Article
- Authors
- Sheppard, D; Janik, C; Keith, T
- Units
- KATM
- Keywords
- 1912, ash-flow, Chemistry, comparison, Fumarole, IAR, Katmai National Park And Preserve, stratovolcanoes, Volcanology/Geothermal