PDF-ZEOLITES (NATURAL)(Data in metric tons unless otherwise noted)

186 Domestic Production and Use atural zeolites were mined by companies in the United States with 1other company working from stockpiled materials or zeolites purchasedfrom other producers for resal. Silver was produced at 3 silver mines and as a byproduct or coproduct from 39 domestic base and precious metal mines Alaska continued as the countrys leading silver producing State followed by Nevada There were 14 US refiners that indicated producti Based on published market prices the value of primary metal production was 407 billion Aluminum consumption was centered in the East Central United States Transportation accounted for an estimated 36 of domestic consumption the remainder was used in 68 Domestic Production and UseAlthough natural graphite was not produced in the United States in 2013, approximately 90 U.S. firms, primarily in the Northeastern and Great Lakes regions, used it for 94 Domestic Production and Use The only commercially active lithium mine in the United States was a brine operation in Nevada. The mine’s production capacity was expanded in 2012, and a new lith 94 Domestic Production and Use The only active lithium carbonate plant in the United States was a brine operation in Nevada. Two companies produced a large array of downstream lithium compounds in th 98 Domestic Production and UseIn 2013, magnesium was produced by one company at a 63,500tonperyear plant in Utah by an electrolytic process that recovered magnesium from brines from the Great Salt L 108 Domestic Production and UseThe United States had only one active nickel mine in 2013a greenfield, underground operation in Michigan. Contractors completed the main decline tunnel of the new chal 118 Domestic Production and Use Phosphate rock ore was mined by 6 firms at 12 mines in 4 States and upgraded to an estimated 28.4 million tons of marketable product valued at $ 2.7 billion, f.o.b. mi 46 Domestic Production and Use Significant U.S. cobaltmine production has not been reported since 1971, and production of refined cobalt from imported nickelcoppercobalt matteceased in 1985. U.S. sup 70 Domestic Production and UseIn 2013, domestic production of crude gypsum was estimated to be 16.3 million tons with a value of about $130 million. The leading crude gypsumproducing States were, in Domestic Production and UseIn 2014, an estimated million tons (21 million short tons) of quicklime and hydrate was produced (excluding commercial hydrators), valued at about $2.2 billion. At yearend, 34 Domestic Production and UseBromine was recovered from underground brines by two companies in Arkansas. Bromine often isthe leading mineral commodity, in terms of value, produced in Arkansas. The Domestic Production and UseIn 2014, 1.26 billion metric tons of crushed stone valued at more than $12.8 billion was produced by 1,550 companies operating 4,000 quarries, 91 underground mines, and 210 Domestic Production and UsePhosphate rock ore was mined by 5 firms at mines in 4 Statesand processed into to an estimated 27.1 million tons of marketable product valued at $2.4 billion, f.o.b. mine.