Another big deposit of copper suspected just outside planned Rosemont mine

Rosemont landscape

By Tony Davis | Arizona Daily Star

A new report raises the possibility that copper extraction for the proposed Rosemont Mine could spread beyond its planned boundaries and be visible from Green Valley.

A new report raises the possibility that copper extraction for the proposed Rosemont Mine could someday spread beyond the existing boundaries of its planned open pit to a mountain ridge line visible from Green Valley to the west.

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The latest Rosemont feasibility study — the third in eight years — concluded that an area lying outside the mine’s planned half-mile-deep pit contains 591 million tons of mineral resources including ores of copper, molybdenum and silver. That’s nearly half the 1.264 billion tons of total mineral resources the study by Hudbay Minerals Inc. says exists in the entire Rosemont mineral deposit on the east side of the Santa Rita Mountains.

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