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التنقيب عن الفضة في الولايات المتحدة بدأ بشكل كبير مع اكتشاف منطقة كومستوك في نيفادا عام 1858. أنتجت الولايات المتحدة 1.200 طن قياسي من الفضة في عام 2007، والذي يغطي 35% من استهلاكها، أما الـ 65% الباقية فتستوردها من المكسيك وكندا وبيرو وتشيلي. ويوجد في البلاد 36 منجم فضة. وقد ازداد الاهتمام بالتنقيب عن الفضة في السنوات الماضية، بسبب ازدياد أسعار المعادن: فقد ارتفع سعر الفضة من 4.39 $ للأونصة في عام 2001 إلى 13.45 $ في عام 2007. (ar) Silver mining in the United States began on a major scale with the discovery of the Comstock Lode in Nevada in 1858. The industry suffered greatly from the demonetization of silver in 1873 by the Coinage Act of 1873, known pejoratively as the "Crime of 73", but silver mining continues today. United States mines produced 1,170 tons of silver in 2014, 17% of the silver it used. 63% of consumption was imported, from Mexico, Canada, Peru and Chile, and the remainder was derived from recycling. Three US mines had silver as their primary product, and 39 mines reported silver as a byproduct of gold and base metals production. Alaska was the country's leading silver-producing state, followed by Nevada and Idaho. Interest in silver mining increased in recent years because of an increased price for the metal: the average silver price increased from 4.39pertroyouncefortheyear2001,to4.39 per troy ounce for the year 2001, to 4.39pertroyouncefortheyear2001,to13.45 per troy ounce for 2007. In 2011, silver prices rose to almost 49pertroyounceinAprilbeforedroppingtoaround49 per troy ounce in April before dropping to around 49pertroyounceinAprilbeforedroppingtoaround34 per troy ounce in late June. In March 2016, the silver price was around $15 per troy ounce. (en) |
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التنقيب عن الفضة في الولايات المتحدة بدأ بشكل كبير مع اكتشاف منطقة كومستوك في نيفادا عام 1858. أنتجت الولايات المتحدة 1.200 طن قياسي من الفضة في عام 2007، والذي يغطي 35% من استهلاكها، أما الـ 65% الباقية فتستوردها من المكسيك وكندا وبيرو وتشيلي. ويوجد في البلاد 36 منجم فضة. وقد ازداد الاهتمام بالتنقيب عن الفضة في السنوات الماضية، بسبب ازدياد أسعار المعادن: فقد ارتفع سعر الفضة من 4.39 $ للأونصة في عام 2001 إلى 13.45 $ في عام 2007. (ar) Silver mining in the United States began on a major scale with the discovery of the Comstock Lode in Nevada in 1858. The industry suffered greatly from the demonetization of silver in 1873 by the Coinage Act of 1873, known pejoratively as the "Crime of 73", but silver mining continues today. (en) |
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