Gold and copper dissemination in the igneous-volcanic Saldana Formation of Natagaima, Colombia, and extension of the mineral province in the Andean Cordillera

摘要

Jurassic hypabyssal and volcanic rocks of the Saldana Formation, that outcrop west of the Magdalena River in the border of Tolima and Huila departments, constitute one of the best exploration targets for large-tonnage gold and copper disseminations in the Colombian Andes, South America. The Saldana rocks formed in an aulacogen that extends throughout the Andes from Venezuela into Argentina. Mineralization is known throughout and forms a continent-wide metallogenic province.