May I ask what are your ages? If you are 31 or under you would probably qualify for a one year working BUNAC visa.
Also as a Geologist your husband is on THE LIST so, providing he meets all other criteria, he qualifies for a PR (Permanent Resident) visa. This is the easiest way to get into the country and he can work where he wishes. Canadian employers are not impressed by resumes (CV's) initially and much prefer meeting applicants face-to-face, so don't be surprised by lack of response.
IMO you should be contacting Headhunting firms specializing in the mining industry.