Can't say I have heard of ice tectonics; however, I know a little. Flowing fluids create friction, which creates heat, and numerous ways to get the juices flowing, so of which you outlined. Water is fluid until it reaches a certain temperature, after which, it stops flowing, and just breaks. Breaking causes friction, etc. Ice flows moving downhill cause friction, etc. All of the friction points cause warmth, heat, etc.<br /><br />Now, water would boil off when the pressure no longer supports it, so if there were constant flow outpourings, you would see fog or clouds. It is likely that any glacial activity has stopped, because it is not actively snowing. However, I heard through the grapevine that ice sheets are receding; therefore, this might set some things in motion, or offer evidence that there might be more to Mars than meets the eye.<br /><br />Your tectonics, or macro-fissure events could possibly create lightning, which is essentially friction on a grand scale. I can imagine that if the hypothetical oceans of Mars were capped off by an ice sheet, then it is possible for large fissures to erupt, for whatever reason. These fissures would fill with fluid, then refreeze or evaporate, in the case of Mars, until the oceans emptied of all fluidity, leaving only ice.<br /><br />Ice: Cherenkov Radiation like blue light could cause heat, and polar melting too. UV?! ... could melt exposed ice, yes. Much of Mars ice is buried, and UV does not penetrate the ground much. Microwaves can melt ice, and penetrate layers too. Let's see, did I leave anything out? Probably. <img src="/images/icons/wink.gif" />