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Iron oxide copper gold (IOCG) deposits are considered to be metasomatic expressions of large crustal-scale alteration events driven by intrusive activity. The deposit type was first recognised by discovery and study of the supergiant Olympic Dam copper-gold-uranium deposit (Olympic Dam mine), and South American examples.
A native platinum nugget, Kondyor mine, Khabarovsk Krai Platinum-palladium ore, Stillwater mine, Beartooth Mountains, Montana, US Sulfidic serpentinite (platinum-palladium ore) from Stillwater Mine, Beartooth Mountains, Montana, USA. Platinum is an extremely rare metal, [26] occurring at a concentration of only 0.005 ppm in Earth's crust.
After World War II, the US wanted to guarantee the supply of cobalt ore for military uses (as the Germans had been doing) and prospected for cobalt within the US. High purity cobalt was highly sought after for its use in jet engines and gas turbines. [78] An adequate supply of the ore was found in Idaho near Blackbird canyon. Calera Mining ...
Western Australia is the world's largest iron-ore producer (34% of the world's total), and extracts 66% (6.9% of world production) of Australia's 306 tonnes (9.8 million troy ounces) of gold in 2022. [58] It is a major world producer of bauxite, which is processed into alumina at four refineries providing 11% of total world production.
Tourism is a large portion of Florida's economy. Florida is home to the world's most visited theme park, the Magic Kingdom. [245] Florida is also home to the largest single-site employer in the United States, Walt Disney World. [246] PortMiami is the largest passenger port in the world and one of the largest cargo ports in the United States. [247]
The rock in the western portion is the result of volcanic eruptions and is estimated to be at least 3.5 billion years old (much older than the eastern portion) and contains the region's ore resources. Banded-iron formations were deposited 2 billion years ago; this is the Marquette Range Supergroup. A considerable amount of bedrock is
The years between World War I and World War II saw extensive use of aircraft, a new technology, in film, a new medium. [3] In the early 1920s, Hollywood studios made dozens of now-obscure "aerial Westerns" with leads such as Tom Mix and Hoot Gibson , where the role of the horse was taken by aircraft, or used aircraft as nothing more than ...
A rare depiction of an auction, on a funeral monument from about the same time as the edict, shows a male slave wearing a loincloth and possibly shackles and standing on a pedestal- or podium-like structure. [367] To the left is an auctioneer (praeco); [368] the gesturing, toga-wearing figure to the right may be a buyer asking questions. [369]