Lots of gold mines owned by Noble, and a few by Nobel. From "the diggings".

https://thediggings.com/entities/by-name/no

There is a Noble County in north central OK. Strangely, no entry on this website that archives mining maps. Lots of entries for other countries, but Noble not even mentioned.

http://mines1.publishpath.com/Default.aspx?shortcut=historic-underground-mining-maps