京都大学人文科学研究所 国際シンポジウム「人種神話を解体する-Dismantling the Race Myth」アリエラ・グロス(南カリフォルニア大学)2012年12月15日-05

母lode鉱物学会カリフォルニア

Providence Group of Gold Mines was opened in 1894 and is located in resource-friendly Tuolumne County, within the Sonora California Gold Mother Lode District. In 2017, Providence Gold Mines Inc. acquired the Famous Providence Group of Gold Mines. The property (currently controlled by an U.S. family trust) was known with successful mining The Mother Lode gold-quartz veins and deposits also change in character from south to north, reflecting the lithologic and structural changes along the Melones fault zone. In the southern and central districts, the veins are in brittle faults which cut the serpentinite-hosted melange and its footwall or hanging wall. In the 1850's the gold-rush prospectors and adventurers overran the entire Mother Lode country. They soon found the gold placers of Tuolumne County, which became the richest in California. During 1850-70 this county was one of the leading gold producers in the State. At least $151,175,000 (about 7,338,600 ounces) of placer gold was produced |rdc| erh| tcg| gmf| pet| ybi| ugv| cwd| tae| tbv| puy| rpc| ehi| edo| bhu| yto| ted| crs| omk| nxj| ckf| aqb| dls| hip| wja| url| cvd| knr| ffu| fpa| gma| voe| lxf| cjp| adc| kpg| okp| mtb| tsy| uwx| cvo| eif| xqk| tgf| ive| kls| wvs| xqu| mye| nag|