The history of Zika virus. The rise in the spread of Zika virus has been accompanied by a rise in cases of microcephaly and Guillain-BarrÃ© syndrome. First identified in Uganda in 1947 in monkeys, Zika was later identified in humans in 1952. The first large outbreak of disease caused by Zika infection was reported from the Island of Yap in 2007. There are currently several countries experiencing Zika virus outbreaks.
In 2014, copper mining produced about 15 metric tons of gold, worth $600 million, which represented 7% of US gold production. Other byproducts of the copper extraction process included silver, and minor amounts of rhenium and platinum-group metals.Sulfuric acid is recovered at copper smelters.opper mining activity increased in the early 2000s because of increased price: the price increased from an average of $0.76 per pound for the year 2002, to $3.02 per pound for 2007.
1 In 1849, about 40,000 miners obtained between $20 and $30 million worth of gold. 2  In 1852 - the peak year of gold mining - about 100,000 miners obtained close to $80 million worth of gold. 3  The state's gold production increased year by year until 1865 when it was less than $18 million.