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Gold is rare and valuable non-ferrous metals on the earth. Unique value and no end of charm and hard to take, making it become a rare treasure, and be welcomed by much of the world of all ages.
How much gold on the earth, where is it distributed?
According to the scientists approximate measurement and estimation of gold reserves on Earth, about 4.8 billion tons. At first hearing, this is really an astronomical figure. But in fact, their distribution within the core of the earth is about 4.7 billion tons within the mantle of about 86 million tons within the crust of about 9.6 million tons, about 4.4 million tons in seawater. That is, 99.7083% of the gold, deep in the Earth's core and mantle. Gold in the earth's core and mantle, even if humans in the distant future, or even infinite future, will never be able to get. Is hidden in the earth's crust and seawater 14 million tons of gold, buried too deep and the taste is too low, 90% of the elusive.
Geophysics: the abundance is based on the relative content of the various chemical elements in some natural systems. Abundance value of gold in the earth's crust is very low, the lowest value in the precious metals, only the equivalent of silver 1/21, 1/18000 of the copper, platinum 1/13, Mercury 1/25.
So far, the world humankind has mined gold, totaled approximately 120 thousand tons, and consumed total gold reserves of about 180,000 tons. Among them, 70% is produced after 1990.
According to 2003 statistics, the world's total annual output of gold is 2593 tons. Among them, over one hundred tons of the national total of eight, followed by: South Africa, 376 tons; the United States, 285 Tuen; Australia, 284 tons; China 213 tons; Russia, 182 tons; Peru, 172 tons; Indonesia, West Asia, 163 tons; Canada , 141 tons. The end of over one hundred tons, the output section 9-20 of the country, followed by: Kesi Tan, 80 tons; Ghana, 70 tons; Papua New Guinea, 69 tons; Mali, 47 tons; Tanzania, 45 tons; Brazil , 43 tons; Chile, 38 tons; the Philippines, 34 tons; Argentina, 29 tons; Kyrgyzstan, 23 tons; Mexico, 22 tons; Colombia, 21 tons. Other countries, few production amounted to 259 tons. Thus, the gold in the distribution of the whole on Earth is very limited. With its high quality products such as Mineral sand washer?Stone jaw crusher?Feed grizzly?Henan Hongxing mining machinery Co.Ltd has ascended in the front rank of the world in the exporting of mining equipments.
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