On the very first turn, I rolled 4 avalanches and 1 pick axe. There isn't much point in testing in the first turn since any oxygen collected would result in an overfill. So, if I choose to climb there is an immediate bust due to avalanche. So, to confirm, no oxygen is expended and no movement occurs? The rules are clear that no climbing is done on a bust, but what about expending the oxygen for the rolled pickaxes?
Ouch! Sorry for the rough first turn! In that case, you would neither gain nor lose anything, and your turn would end. Hopefully the next roll favors you a bit more!