The history of gold production in the United States

In the national economy of the United States, gold plays a pivotal role. From 1804 to 1995, the total production of commercial gold in 24 states exceeded 420 million ounces (equivalent to 13,000 tons). In 1999, there were about 70 vein gold mines and more than a dozen placer gold mines (most of them are concentrated in the national economy of the United States, and gold plays a pivotal role. From 1804 to 1995, the total commercial gold production in 24 states exceeded 4.2. Billion ounces (equivalent to 13,000 tons). In 1999, about 70 vein gold mines and a dozen placer gold mines (mostly concentrated in Alaska) were in production. The gold output of 30 gold mines accounted for 90% of total gold output. The total output value of the gold mine is US$3.1 billion. There is no record of early gold discovered by Native Americans. There are records from the mid-17th century in the east and the 1870s in the west. Commercial production began in North Carolina in 1804. In the mid-1930s of the 19th century, with the discovery and mining of several placer gold mines in Appalachia, commercial production began to develop. After the peak of production in the 1930s and 1940s, The mine was almost exhausted. In addition to the discovery of a new gold mine in California in 1848, the miners moved to the west. At this time, the production of Appalachian gold began to decline. At that time, California and neighboring states maintained a few hundred Annual gold production of 10,000 ounces. With the decline of California’s “gold rush”, gold mines in several Rocky Mountain states, South Dakota and Alaska are increasingly being discovered and mined. Regions, states, and total production are all dependent on gold. The time of discovery, the scope of placer gold, effective labor, science and technology, government trusteeship, and of course the price of gold. By 1900, the major gold rush had passed and most major production areas had been determined. Moreover, a fixed gold price ( (Beginning in 1837) The stimulus for further exploration and development is becoming less and less. During the economic recession, the rise in the price of gold strongly stimulated gold production, but due to the war (World War II), the Wartime Committee l- Order No. 208 caused a major drop in gold production. By 1942, many gold mines closed down. After the war, stable gold prices and the promulgation of the U.S. gold ownership ban once again reduced gold production. The free price of gold began in 1968, allowing the United States to After people can once again own gold mines, this has brought new attractions to gold production. In 1980, the price of gold rose to 850 US dollars per ounce, and until 1995, the price of gold remained above 350 US dollars per ounce. The expensive price, In addition, large-scale mining and technical methods for extracting gold from low-grade ore have stimulated new exploration and development. Therefore, in the early 1990s, gold production reached more than 10 million ounces per year, of which 65% was produced in Nevada. Since the beginning of the 20th century, the grade of gold ore has continued to decline, and the method of finding gold has also undergone tremendous changes. Although the grade is declining, the technology of recoverable gold has become more and more advanced. The US gold production in the 1990s was more than twice that of the 1970s. Previous: The difference between pure gold and thousand pure gold Next: Jewelry processing stealing gold under the nose Technique