I study the fumarolic ice caves of Erebus Volcano, and am looking for published research on similar sorts of caves. My criteria for a "fumarolic ice cave" are that it must be:
- A gas-filled void space in a snowpack large enough to fit humans
- Present because of geothermal or volcanic heat
- Not primarily present because of a flow of water
So far, these are the fumarolic ice caves I know of:
- The fumarolic ice caves of Mt. Erebus, Antarctica
- The crater firn caves of Mt. Rainier, USA
- Crater firn caves of Mt. St. Helens, USA
- Caves in Mt. Baker's Sherman Crater, USA
- Small fumarolic ice cave on Villarrica volcano, Chile (no reference, I've just been in it)
I imagine there are probably hundreds more and these things are common on glaciated volcanoes. I'd be particularly interested in references for Kamchatka and Iceland where I suspect I may not be able to find information because of the language barrier.
Note that I am not asking about rock-hosted caves with a permanent ice mass.