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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.
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 ...
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]
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 ...