Juan Godoy discovers the rich silver outcrops of Chañarcillo sparking the Chilean silver rush.

Juan Godoy was a Chilean farmer and miner who in 1832 discovered an outcrop (reventón) of silver 50 km (31 mi) south of Copiapó in Chañarcillo, sparking the Chilean silver rush.

Chañarcillo is a town and mine in the Atacama Desert of Copiapó Province, Atacama Region, Chile, located near Vallenar and 60 km from Copiapó. It is noted for its silver mining. The town grew after the Chañarcillo silver mine, discovered on May 16, 1832, by Juan Godoy, sparked the Chilean silver rush. It grew in prominence in the second half of the nineteenth century and became important in the Atacama mining industry and one of the most important mines to the Chilean economy. It was connected by railway before 1862. Today the settlement is largely in ruins.

Between 1830 and 1850, Chilean silver mining grew at an unprecedented pace which transformed mining into one of the country's principal sources of wealth. The rush caused rapid demographic, infrastructural, and economic expansion in the semi-arid Norte Chico mountains where the silver deposits lay. A number of Chileans made large fortunes in the rush and made investments in other areas of the economy of Chile. By the 1850s, the rush was in decline and lucrative silver mining definitively ended in the 1870s. At the same time, mining activity in Chile reoriented to saltpetre operations.

May 16 is the 136th day of the year in the Gregorian calendar; 229 days remain until the end of the year.