Article from mining conferenceLikely the first of many... and this isn't even from UAV, just about them!
https://vancouversun.com/news/local-news/prospectors-look-to-technology-to-help-along-rebound-in-mining-exploration
Personally I was sold just on the headline "Michael Burns can take a crew of two or three people with one of his company’s drones out to a remote mining claim and in a day do the survey work it would take a crew of four or five a month to do on the ground."