The closed mine in San Manuel could reopen under a deal announced by a Canadian company that also wants to develop a major ...

It’s also one of 60 critical minerals essential to U.S. economic, energy and national security applications, but it has ...

A Canadian company wants to reopen the San Manuel copper mine more than 20 years after it closed northeast of Tucson.Five takeaways from Sunday's story about a Canadian company's plan ...

Tempe's Arizona Sonoran Copper is suddenly at the center of a billion-dollar chess move, with Hudbay Minerals proposing an all-stock takeover worth about $1.5 billion that would pull the Cactus ...

The project to expand a mine producing manganese and zinc is expected to receive final approval by this summer.

ASU and Freeport are building robots and sensors to speed copper sorting and shrink processing waste in Arizona.

More than a year after uranium shipments resumed, the Navajo Nation EPA is drafting regulations and asking for public input ...

Spanning over 60,000 acres, the Morenci copper mine in eastern Arizona — one of the largest-open-pit mines in the world — produces hundreds of millions of tons of copper ore each year. But the steep ...

To get to Clifton, you have to really want to get to Clifton. The nearest big city is Tucson, about three hours away. After spending the night at an uncharacteristically ratty Holiday Inn Express in ...

Arizona’s three public universities have developed a new tool to help environmental officials find and cleanup abandoned mines in the state.

A “Hold” Rating for Shares of Arizona Metals Corp. In this analysis, we reiterate our “Hold” rating on the US-listed shares of Arizona Metals Corp. (OTCQX:AZMCF). This rating is consistent with our ...

MAMMOTH, Ariz.—When Hector Denogean Sr. got his first paycheck from his new job at the Christmas copper mine in 1979, he felt like the richest 18-year-old this side of the Galiuro Mountains. His first ...