Portugalete, Sud Chichas Province, Potosí Department, Bolivia

19th century ghost town whose mines worked the west end of the same 2.5km long vein system as Tatasi (on the east end of the W-E trending veins). Silver mining started already in the 16th century. Massive miargyrite was the main silver ore mineral in some orebodies. Dacitic stock up to 4,500 meters elevation, intruded Ordovician shales and Tertiary red sandstones.

Ref.: Palache, C., Berman, H., & Frondel, C. (1951), The System of Mineralogy of James Dwight Dana and Edward Salisbury Dana, Yale University 1837-1892, Volume II: 872.

Federico Ahfeld y Alejandro Schneider-Scherbina (1964) Los Yacimientos Minerales y de Hidrocarburos de Bolivia. (Ministerio de Minas y Petroleo, La Paz)