Why can I not find any Aluminium?

I've played a number of matches now on an Earth map in BNW, both with a modded and unmodded version, and for some reason, I never find any aluminium anywhere. I find plenty of Iron, Uranium, Coal and Oil, but I never find any Aluminium spawns. I've tried this on multiple machines, with and without a realistic earth mod, with both Venice, Egypt and America. I always have to resort to the paltry 10 you get from the recycling centers. I have the tech, and I even once took the time to check the entire map after I unlocked satellites, and I still didn't find any.

Is this just a freak coincidence or are there actually documented reasons for this occuring?

Solution 1:

The custom map you're using has an issue, it doesn't appear to be a problem with the game itself.

https://steamcommunity.com/workshop/filedetails/discussion/77138438/135508489638009415/