Open source prospectivity maps - help needed

I’m looking for help with creating spectral and geological analysis maps from open source data and then correlate these maps with historical mines and mineral encounter maps to create a new map that will help to identify high potential areas to find more minerals. Then I’m looking to integrate this map as a layer to my web application that I’ve built so it can be accessible in the field offline over the phone. Is there anyone who could help me with this task? Please let me know.