地质通报Issue(7)：1055-1060,6.
秦祁昆结合部瓦勒根金矿床含矿斑岩体岩石学和LA-ICP-MS锆石U-Pb年龄
Petrology and LA-ICP-MS zircon U-Pb age of the ore-bearing porphyry in the Walegen gold deposit at the juncture of the Qinling-Qilian-Kunlun orogens
摘要
Abstract
The middle Triassic calc-alkaline arc magmatism and its related porphyry-skarn type Cu-Au, Cu-Mo and Ag-Pb-Zn polymetallic deposits are widespread at the juncture of Qinling-Qilian-Kunlun orogens. The Walegen Au deposit is a newly-dis-covered porphyry deposit. The host rocks of the Walegen deposit are quartz porphyry and granite porphyry, with the quartz porphy-ry more closely related to gold mineralization. The results of zircon U-Pb analysis by using LA-ICP-MS technique indicate that the granite porphyry was formed in middle Triassic (237Ma), and contained voluminous Paleozoic-Proterozoic inherited zircons. These characteristics are similar to characteristics of other porphyry Cu-Au deposits in this region. These data suggest that the mag-mas produced by northward subduction of Paleo-tethys ocean captured pre-Triassic crust and mantle materials, resulting in the arc magmatism and the formation of related porphyry-skarn deposit assemblage at the juncture of Qinling-Qilian-Kunlun orogens.关键词
LA-ICP-MS锆石U-Pb年龄/花岗斑岩/瓦勒根金矿/秦祁昆结合部Key words
LA-ICP-MS zircon U-Pb age/granite porphyry/Walegen gold deposit/juncture of Qinglin-Qilian-Kunlun Orogen分类
天文与地球科学引用本文复制引用
李德彪,牛漫兰,夏文静,吴齐,王琳琳..秦祁昆结合部瓦勒根金矿床含矿斑岩体岩石学和LA-ICP-MS锆石U-Pb年龄[J].地质通报,2014,(7):1055-1060,6.基金项目
国家自然科学基金项目（批准号41372207、41272221）和中国地质调查局项目 （）
