Northern Dynasty Minerals Ltd (NAK)

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The Pebble deposit in Alaska holds a particularly large store of rhenium on U.S. soil.
The Pebble deposit hosts 6.46 billion metric tons of measured and indicated resource averaging 0.4 percent (56.9 billion pounds) copper, 0.34 grams per metric ton (70.6 million ounces) gold, 240 parts per million (3.4 billion lb) molybdenum and 1.7 g/t (344.6 million oz) silver.
Calculations completed in 2011 estimates the measured and indicated resource contains roughly 0.45 g/t rhenium, which equates to around 2.9 million kilograms, or roughly US$6.4 billion, of the critical superalloy metal.
This is enough rhenium to supply the world's needs for more than four decades at 2017 consumption levels and does not account for the rhenium contained in the 4.45 billion metric tons of inferred resource outlined at Pebble.
USGS believes rich stores of rhenium at Pebble could be indicative of Alaska's larger potential for this superalloy metal.