"Company†) announced today that an illegal blockade is underway at its mine in Oaxaca, Mexico that will affect production. The Company received notice from the CTM union that four contractors operating at the mine site are no longer affiliated with the union. Pursuant to the terms of the CTM union agreement, the Company issued termination notices to the four contractors who provide camp support, security, ore haulage,. DENVER--(BUSINESS WIRE)--Gold Resource Corporation (NYSE American: GORO) (the ...