【摘要】 前人根据区域地质背景的研究,提出莱历斯高尔铜钼矿区岩浆与成矿作用的时代为加里东期。笔音通过对该矿床的围岩、辉钼矿及其共生石英的年代学研究,分别获得花岗闪长斑岩锆石 SHRIMP U-Pb 和全岩 Rb-Sr 等时线年龄为362±12Ma(95%可信度)和350±15Ma(95%可信度)、辉钼矿 Re-Os 等时线和舍矿石英矿物 Rb-Sr 等时线年龄为359±8Ma(95%可信度)和341±9Ma(95%可信度)。上述测定结果表明,产于西天山博罗科努地区的莱历斯高尔钼矿床及其相关的岩石形成于晚泥盆世-早石炭世,与区域上同时代的陆相火山岩型金矿(如阿希)及吐拉苏火山盆地北侧博罗霍洛隆起带上的喇麻苏斑岩-矽卡岩型铜矿相伴,均属海西期岩浆活动的产物。更多还原

【Abstract】 Based on reginoal geology,former researchers proposed that the Lailisigao’er Cu-Mo deposit was formed during Caledonian magmatism and mineralization.In this paper,we report new geochronologic data on host rocks,molybdeuite and quartz from ores,which suggest that the Lailisigao’er Cu-Mo deposit and its host rocks were formed during Hercynian magmatism of the later stage of Devonian or early stage of Carboniferous.The SHRIMP U-Pb age of zircon and Rb-Sr isochron age of granodiorite,which is the host rock of the Mo mineralization,are 362±12Ma (95% conf.) and 350±15Ma (95% conf.),respectively.The Re-Os isochron age of molybdenite and Rb-Sr isochron age of quartz from ores are 359±8Ma (95% conf.) and 341±9Ma (95% conf.), respectively.Hence,the Lailisigao’er Cu-Mo deposit has the stone age as the Axi gold deposit (genetically related to continental volcanism) and the Lamasu copper deposit (porphyu-skarn type deposit in the Boluohuoluo uplift belt on the north margin of the Tulasu volcanic basin) in the region.which are in good agreement with a convergent tectonic setting of island arc during the later stage of Hercynian regional plate movement for the studied area.更多还原