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Cobalt silver rush
The Cobalt silver rush started in 1903 when huge veins of silver were discovered by workers on the Temiskaming and Northern Ontario Railway (T&NO) near the Mile 103 post. By 1905 a full-scale silver rush was underway, and the town of Cobalt, Ontario sprang up to serve as its hub. By 1908 Cobalt produced 9% of the world's silver, and in 1911 produced 31,507,791 ounces of silver. However, the good ore ran out fairly rapidly, and most of the mines were closed by the 1930s. There were several small revivals over the years, notably in World War II and again in the 1950s, but both petered out and today there is no active mining in the area. In total, the Cobalt area mines produced 460 million ounces of silver.
The Cobalt Rush was instrumental in opening northern Ontario for mineral exploration. Prospectors fanned out from Cobalt, and soon caused the nearby Porcupine Gold Rush in 1909, and the Kirkland Lake Gold Rush of 1912. Much of the settlement in northern Ontario outside the Clay Belt owes its existence indirectly to the Cobalt Rush.
==Before the rush==
In the late 19th century the Ontario government started a program to establish settlements in the Clay Belt, a band of rich soil running north of Lake Temiskaming. The government wanted to open what was then known as "New Ontario", after it had been merged into the province from formerly Northwest Territories land. At the time, direct settlement to farms was still fairly widespread, and the towns of New Liskeard and Haileybury formed in the 1890s as the hubs of this activity.
The settlements generated some commercial interest in building a railway from North Bay to New Liskeard, but these plans ended when the rate of settlement dwindled at the turn of the 20th century. In 1902 the government decided to take over the project and started development of the T&NO, contracting out construction to a wide array of companies. By the summer of 1903 the line was about long and was approaching Haileybury.
抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』
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