After some testing about why emp mines were doing nothing to carriers, I found something out. It seems that EMP mines inflict paralysis damage, not EMP damage, despite the name. If this is intended, then I would reccomend a name change to Paralysis Mines, so as not to confuse people about what is really immune to them (like it did for me). If this is not intended, well, I guess bug report.
EDIT:
Tested by simply starting a game, surrounding wormholes with EMP mines, and waiting for wave. Saw that units had the paralysis timer countdown, not the EMP one.