| Location | |
|---|---|
  Hidden Valley mine | |
| Morobe Province | |
| Country | Papua New Guinea |
| Coordinates | Coordinates: 6°58′04″S146°25′29″E / 6.9678°S 146.4248°E |
| Production | |
| Products | Gold |
The Hidden Valley mine is a gold mine in Papua New Guinea. [1] The mine is located in the south-east of the country in Morobe Province. [1] The mine has estimated reserves of 6.4 million oz of gold. [1]
Gold is a chemical element with the symbol Au and atomic number 79, making it one of the higher atomic number elements that occur naturally. It is a bright, slightly orange-yellow, dense, soft, malleable, and ductile metal in a pure form. Chemically, gold is a transition metal and a group 11 element. It is one of the least reactive chemical elements and is solid under standard conditions. Gold often occurs in free elemental (native) form, as nuggets or grains, in rocks, veins, and alluvial deposits. It occurs in a solid solution series with the native element silver, naturally alloyed with other metals like copper and palladium, and mineral inclusions such as within pyrite. Less commonly, it occurs in minerals as gold compounds, often with tellurium.
Mining is the extraction of valuable minerals or other geological materials from the Earth, usually from an ore body, lode, vein, seam, reef, or placer deposit. Exploitation of these deposits for raw material is based on the economic viability of investing in the equipment, labor, and energy required to extract, refine and transport the materials found at the mine to manufacturers who can use the material.
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