Word: open-pit
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...UNCERTAIN GRACE: THE PHOTOGRAPHS OF SEBASTIAO SALGADO, San Francisco Museum of Modern Art. The first U.S. exhibition for the Brazilian-born Salgado, a onetime economist who took up photography to document life in developing nations. Whether in a Peruvian village, an open-pit gold mine in Brazil or a refugee camp in Ethiopia, Salgado sees not just hardship, though he sees a great deal of that, but also the immemorial underpinnings of life -- tradition, community and work -- that give suffering a meaning. Through...
About a dozen large open-pit gold mines using such techniques are now strung out along the Carlin Trend. The Dee. Maggie Creek. Gold Quarry. Goldstrike. Blue Star. The Rain. The Bootstrap. American Barrick Resources Corp., a Canadian company, recently announced plans to excavate a billion tons of rock to get at 12 million oz. of gold -- worth about $4.4 billion at current prices. In the process, the mine will bequeath to posterity a hole 1,500 ft. deep, 4,000 ft. wide and 7,000 ft. long...
...good news for nearby White Pine County, a dusty patchwork of small towns, ranches and mines. Indeed, merchants from Ely (pop. 7,000) convinced Nevada's congressional delegation last summer that the park was desperately needed. For decades, Kennecott Copper Corp., which provided thousands of jobs at an open-pit mine near Ruth, had argued that the mountains might be mineral rich. By 1980 the mine was closed, undercut by cheap foreign copper. Unemployment skyrocketed. The new park, they hoped, would bring paying guests for hotels, restaurants and other services. Conservation suddenly began to look like good business...
...part of an industry-wide drive to cut costs, most of today's gold mines are surface, or open-pit, operations, a method used in copper and coal mining. The new excavations can take as long as eight years to start up, but then can handle thousands of tons of low-grade ore daily. The latest mines make use of a chemical technique called heap leaching to reduce costs. The procedure involves the spraying of crude ore with a cyanide solution that absorbs microscopic amounts of gold as it filters through the heaps of rock. After further processing...
...Camp, Calif., about 120 miles east of San Francisco. Angels Camp provided Mark Twain with notebooks full of prospecting lore for his short story The Celebrated Jumping Frog of Calaveras County. Today workers for the Carson Hill gold-mining company are blasting and carving out a 1,100-acre open-pit site. When it begins full operation in October, the Carson Hill venture will be the first commercial gold mine to open in the Angels Camp area since 1950. The company's general manager, W.B. Williams, expects to cull only .046 oz. of gold per ton of ore mined...