alt Hacker NewsIt's not for mining, but the US built Camp Century and Camp TUTO in the ice to determine how feasible Project Iceworm would be. A construction film about the former was declassified some decades ago [0]. Icefield construction wasn't feasible even in the context of cold-war era MAD spending.
Actual subglacial mining has only been attempted a few times. Kumtor gold mine in Kyrgyzstan is in the middle of a couple glaciers and reshaped the landscape to redirect the glaciers a bit. Svea Nord in Svalbard ran tunnels under a glacier for coal. Canada's Granduc mine wasn't technically on or under a glacier, but it was just below one.
[0] https://archive.org/details/TheU.S.ArmysTopSecretArcticCityU...
I guess I don't even know what to do with some of this information. It occurred to me that you'd also probably have to build some infrastructure (power plant, railroad, fuel terminal, a real port... I don't know) in order to even get the ball rolling. I don't think anyone's going to pay for that by taxing the citizens of Nuuk.
I also wonder if there has ever been a real geopolitical obstacle to doing this stuff, since the Danes and Greenlanders seem amenable to doing business. It would seem the obstacles have all been financial.