Underground Mining and Occurrence of Copper-Bearing Tourmalines in the Host Rock at the Quintos Mine in Brazil
Fig. Par21 Underground tunnel in the Quintos tourmaline mine that was driven into the hard quartzite rock. Only at certain positions can the gem-bearing pegmatites be found (See inserted pictures). P. Wild Archive.
Fig. Par22 Occurrence of highly valuable copper-bearing tourmalines at the P. Wild’s Quintos mine. A quartz-feldspar pegmatite has intruded a quartzite host rock. In some zones the desired “neon-blue” colored copper-bearing tourmaline was formed. In the picture on the left the mining geologist and on the right the mining engineer. The Geological map (inserted) helped to find the gem-bearing layers. P. Wild Archive.
Underground Mining and Occurrence of Copper-Bearing Tourmalines in the Host Rock at the Quintos Mine in Brazil
