Mission, Twin Buttes were first major ore bodies here found by geophysical methods.
Mexican environmental authorities have filed a lawsuit against the mining operation.
Satisfying readers' curiosity about what's under construction around Tucson.
It seems like mining has always been big in Arizona. In 1736 the discovery of silver just below the current border with Mexico drew prospective Spanish miners northward into Southern Arizona. After Arizona became a U.S. territory, gold was found near Yuma in 1858 and in 1863 in the Bradshaw …
Tucson-based Asarco held a formal dedication ceremony this week — led by President and COO Manuel Ramos — of the expansion of the south mill at the Mission Mine south of town.
The mining giant Asarco will pay Pima County its second round of civil penalties and environmental reparations in three years over tailings dust blowing from its Mission Mine in Sahuarita into neighboring homes.
Federal authorities have fined Tucson-based copper-mining giant Asarco more than $800,000 for failing to permit an audit of the company’s production from its Mission mine near Sahuarita.
A diesel-electric power shovel loads a new Komatsu haul truck at Asarco LLC's Mission Mine in Sahuarita. Five more Komatsus are due to arrive this year, and the fleet of trucks will eventually total 14.
Asarco has taken delivery of the first of 14 massive haul trucks ordered as part of an expansion of the Mission mining operation in Sahuarita, which will add nearly 50 jobs.
The site of a proposed Oracle Ridge copper mine is on the north side of the Santa Catalina Mountains, between Mount Lemmon and the town of Oracle.
Pima County's environmental chief, who denied an air-quality permit for the Rosemont Mine last year, plans to approve one for a much smaller copper mine slated for the back side of the Catalina Mountains.