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翻訳と辞書　辞書検索 [ 開発暫定版 ] スポンサード リンク Silver mining in Arizona ： ウィキペディア英語版 Silver mining in Arizona (詳細はArizona. Cumulative silver production through 1981 totaled 490 million troy ounces (15 million kg). However, only about 10% of Arizona's silver production came from silver mining. More than 80% of the state's silver was a byproduct of copper mining; other silver came as a byproduct of lead, zinc, and gold mining.〔 == The Spanish and Mexican eras == Silver ore was first discovered in west-central Arizona in 1583 by Spanish explorer Antonio de Espejo, but no mining resulted. Again in 1598, Juan de Oñate led another expedition searching for Espejo’s silver; many claims were staked, but the expeditioners returned to Santa Fe without mining any silver, and the deposits remained unexploited. Espejo’s silver discovery is thought to be at the site of present-day Jerome, which later became a major copper-mining district.〔Richard T. Moore and George H. Roseveare (1969) ''Silver'', in ''Mineral and Water Resources of Arizona'', Arizona Bureau of Mines, Bulletin 180, p. 254-255.〕 Father Eusebio Kino, in charge of the Spanish missions in southern Arizona from 1687 to 1711, noted a number of “minas” in the mountains bordering the Santa Cruz valley (present Santa Cruz County, Arizona), but the Spanish word “mina” can mean either a mine or an unexploited mineral deposit. A noted silver discovery in 1736 at Planchas de Plata, Sonora, just south of the present Arizona/Sonora border drew attention to the silver potential of the area. Later Spanish documents record mining in the 1770s in Quijotoa, Aribac, and Arivaca, in southernmost Arizona. Mining was held back because Arizona was the northern fringe of the Spanish frontier, and plagued by guerilla war with the Apaches.〔John C. Lacy, ''Early history of mining in Arizona, acquisition of mining rights 1539-1866'', in ''History of Mining in Arizona'', Tucson: Mining Club of the Southwest Foundation, p.1-6.〕 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Silver mining in Arizona」の詳細全文を読む スポンサード リンク 翻訳と辞書 : 翻訳のためのインターネットリソース Copyright(C) kotoba.ne.jp 1997-2016. All Rights Reserved.