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Collection figures dropped to c.200,000 tons a year after the war but rose again in 1948 when 311,577 tons were collected by local authorities. [9] With the price of scrap paper fixed at around £5 a ton for a mixed bundle (compared to 5s before the war) and rising for higher grades, this contributed between £3m and £5m to the economy.
During World War II, government-mandated restrictions on the use of various metals halted production of all metal toys in favor of the war effort. Lionel, seeking an alternative product to keep the brand name alive during the war, sought the assistance of Samuel Gold, a designer of various novelties including cereal and soft drink premiums ...
The end of the war brought an end to high prices, and nearly all companies closed, leaving only the Calumet and Hecla, Quincy, and Copper Range mining companies. Both Calumet and Hecla and Quincy survived largely by reprocessing the stamp sand left from older mining operations, leaching out copper left by more primitive processing techniques.
In Britain, the Chalcolithic is a short period between about 2,500 and 2,200 BC, characterized by the first appearance of objects of copper and gold, a new ceramic culture and the immigration of Beaker culture people, heralding the end of the local late Neolithic.
Mining began in the period 1895–1900, and continued until shortly after World War I. Copper is present as chalcopyrite, occurring with magnetite, pyrite, garnet, epidote, diopside, and hornblende, in replacement deposits in greenstone. Gold and silver were recovered as byproducts. [13] Copper was discovered at Prince William Sound in 1897.
A combination of low copper prices, depleted mines, competition from newer and richer mines, and continuing labor troubles eventually closed all of the Copper Country Mines. While the Quincy Mine had already shut down in 1931, it was reactivated in 1937 due to World War II-era demand for copper; however, it shut down permanently in 1945. [12]
Reconstruction of Ötzi's copper axe (c. 3300 BCE). The Copper Age, also called the Eneolithic or the Chalcolithic Age, has been traditionally understood as a transitional period between the Neolithic and the Bronze Age, in which a gradual introduction of the metal (native copper) took place, while stone was still the main resource utilized.
World War II brought a brief increase in demand for products from the Copper Basin. A sulfuric acid plant was constructed in Copperhill in 1942, and by 1949 liquid sulfuric acid was being produced. [23] Faced with decreasing demand and increasing foreign competition, however, the mining industry began to decline in the Copper Basin in the 1950s ...