The Morenci Mine is the largest copper mine in the US and one of the biggest in the world. As of 2007, operations ran around ...

The Clifton-Morenci mining district in eastern Arizona is sometimes referred to as the Copper Mountain mining district. But while known mainly for copper deposits, it also produced uncommon minerals.

“It’s very representative,” said Arizona State University history ... Phelps Dodge, the mining company that controlled Morenci, ended segregation in 1969. Then it found copper ore underneath ...

Extensive exploratory drilling further revealed the mining potential of the low-grade sulfide Clay ore body at Morenci which had been explored by the Detroit Copper Co. and the Arizona Copper Co ...

from Morenci in Arizona. The town was built to house the mine’s workers and their families in the late 1800s, back when mules hauled crates of ore up the mine’s dusty slopes. And like much of ...

The Morenci mine looked like the Sarlacc monster ... U.S. Treasurer Romana Acosta Bañuelos — were born in Arizona mining towns or traced their lineage there. I share those roots.

(Sam Ribakoff/Courthouse News) Deep in rural eastern Arizona, Clifton lies where the Sonoran Desert starts to climb into the White Mountains, ocotillo cactus giving way to ponderosa pines. Morenci, an ...

With the completion of the transaction, Freeport now holds a 72% stake in the Morenci joint venture with Sumitomo Metal Mining Arizona Inc. (SMMAz) and SMM owning 15% and 13%, respectively.

U.S. copper production, currently 1.2 million metric tons a year, has been dropping because the nation’s biggest mine, the Morenci in Arizona, is declining and may be exhausted in 20 years.