Hoov, you can right-click on any of the images and do a "save image URL" option, then go up to your URL bar in your browser (address line) and hit ctrl-V (for paste) and the URL of the image will appear there.

Example:

http://gsc.nrcan.gc.ca/mindep/synth_dep/ni_cu_pge/images/fig04.jpg

Then, start chipping away at the stuff at the end of the line, trying different links, to see if you hit a website.

Example:

http://gsc.nrcan.gc.ca/mindep/synth_dep/

Unfortunately, that takes you to a restricted area of the website, so the poster must have an account to get access to it.

However, if you go up one level (just to /mindep) you can see the wider portal to get to that section, even though you wouldn't be able to drill down and actually get access without the password.

So in other words, these particular images are from Natural Resources Canada. I'm guessing that they are part of this publication:

http://gsc.nrcan.gc.ca/mindep/index_e.php