The UNDP and the government of the Republic of Honduras did systematic investigation works for ore deposits, for five years from 1969 to 1974, in total area of 10,800 km² in the northwestern part of the country, employing the methods of regional geological survey, geochemical exploration, local detailed geological survey, detailed geochemical exploration, geophysical exploration, pitting, trenching and diamond drilling, and selecting high potential areas for mineralization, recommended further detailed exploration in several areas as Chamelecon and Petoa, leaving the minuteful reports of geology and mineral deposits and the geological map of 1 to 50,000.The UNDP and the government of the Republic of Honduras did systematic investigation works for ore deposits, for five years from 1969 to 1974, in total area of 10,800 km² in the northwestern part of the country, employing the methods of regional geological survey, geochemical exploration, local detailed geological survey, detailed geochemical exploration, geophysical exploration, pitting, trenching and diamond drilling, and selecting high potential areas for mineralization, recommended further detailed exploration in several areas as Chamelecon and Petoa, leaving the minuteful reports of geology and mineral deposits and the geological map of 1 to 50,000.