hi! not discouraging further contributions - particularly more details on the tools used - but you can get started on this section in the FAQ (link on sidebar):

Mineral resource extraction - a note that the first mines were not for metal, but flint and salt, plus many discussions on prospecting and mining

just a recommendation to also follow the link to Metalworking in pre-Columbian America, where there are a few discussions on prospecting in a region that didn't particularly make tools from metal