Exhibit 10.a Unincorporated Association Contract entered into by and between Minera Santa Rita S. de R.L. de C.V. ("Santa Rita"), represented by Jack Veeder Everett and Roger Austin Newell, of the one part, as active member, and Grupo Minero FG S.A....Leadville Mining & Milling Corp • March 25th, 2002 • Gold and silver ores
