as a lead mine but the lead soon was largely exhausted and the...

as a lead mine but the lead soon was largely exhausted and the value of the cryolite was realized. none of the original lead remains

First, no mention of zinc? So zinc remains?
As for the lead. Misleading statement when you actually read the results that anyone can check the truth for themselves

Furthermore, up to 1.7 per cent copper, 18.2 per cent zinc and 7.7 per cent lead was also encountered
https://thehttps://themarketherald.com.au/eclipse-metalhttps://themarketherald.com.au/eclipse-metals-asxepm-identifies-high-grade-cryolite-and-fluorite-in-greenland-2021-03-10/s-asxepm-identifies-high-grade-cryolite-and-fluorite-in-greenland-2021-03-10/marketherald.com.au/eclipse-metalhttps://themarketherald.com.au/eclipse-metals-asxepm-identifies-high-grade-cryolite-and-fluorite-in-greenland-2021-03-10/s-asxepm-identifies-high-grade-cryolite-and-fluorite-in-greenland-2021-03-10/

no unstable wall
But you wont guarantee it or let it be inspected? Or needing to mine the resource out from the footings or mention of fracturing or where the water comes from and why it fills to sea level.
Need a bit more info gbb.

no earthquakes
Besides this article on Greenlandic earthquakes maybe??
Olsen and her colleagues found that the annual tally of earthquakes increased significantly between 1993 and 2011, from about 10 quakes per year initially to about 40 quakes per year most recently. Moreover, of the 305 glacial earthquakes in total that have struck the Greenland ice sheet since 1993, 145 of them, or nearly half, occurred from 2011 to 2013.https://eos.org/articles/more-frequent-glacial-quakes-on-greenland-signal-ice-retreat