Overview
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The Pebble deposit is among the largest copper-gold porphyry systems, and one of the greatest stores of mineral wealth, ever discovered. The U.S. Geological Survey lists the Pebble resource lands as the most extensive mineralized system in the world.
Since acquiring Pebble in 2001, Northern Dynasty and the Pebble Partnership have expanded known mineral resources by more than 1000%. With ~1,000,000 feet of drilling in ~1,200 holes, a significant proportion of known mineralization at Pebble is in measured or indicated categories.
In total, the current Pebble resource estimateincludes 5.94 billion tonnes in the measured and indicated category containing 55 billion lb copper, 67 million oz gold and 3.3 billion lb molybdenum; and 4.84 billion tonnes in the inferred category, containing 26 billion lb copper, 40 million oz gold and 2.3 billion lb molybdenum. Quantities of silver, palladium and rhenium also occur in the deposit. It is a known mineral resource with the volumes, grades, metallurgy, geometry and potential to support a modern, long-life mine.