Travis

I've been looking for a book I've previously read for a while now, but haven't been able to figure out the title at all.

The basic premise of the plot was that there has been a mysterious death at a research station in the Arctic/Antarctica, and I don't remember why the victims were killed, but the method used to kill them was to grind up some moss/lichen/other from under the ice shelves and add it to the talcum powder people were using to put their snow suits on.

I think maybe it killed them by absorbing all the oxygen in their blood?

If anyone can assist me with the title I would greatly appreciate it.