Marimaca Copper Corp. is a Canadian copper company, focused on the Marimaca copper oxide project located in the Antofagasta region of Chile. The project is an open-pit, low capital and low-risk operation, boasting as the only major copper discovery globally in the last five years. The company, like various other Chilean mining companies, experienced relief as the country voted against a suggested new constitution. The now rejected constitution would have seen the nationalisation of mines in the country amongst other radical changes.