1. Centre for Ore Deposit and Earth Science (CODES), University of Tasmania, Hobart, Australia
2. Departamento de Física y Geociencias, Universidad del Norte, Barranquilla, Colombia
3. Centro de Geociencias, Universidad Nacional Autónoma de México, Juriquilla, México
4. Geology Department, GR Silver Mining Ltd., Vancouver, Canada
5. Geology Department, Metallerz Exploration, Vancouver, Canada