【作者】 周新华； 杨进辉； 张连昌；

【Author】 ZHOU Xinhua,YANG Jinhui & ZHANG Lianchang Institue of Geology and Geophysics,Chinese Academy of Science,Beijing 100029,China

【机构】 中国科学院地质与地球物理研究所；

【摘要】 成矿年代学研究表明胶东地区超大型金矿形成于120±10 Ma范围内。典型金矿Sr、Nd和Pb同位素组成反映成矿物质来源具有多元性和幔源物质参与成矿的信息。研究表明胶东地区之所以在中生代发生成矿大爆发,有其深部地质作用的原因。其中最主要的可能是中央造山带大陆深俯冲的后效作用和古太平洋板块俯冲的远程效应,由此诱发深部的岩石圈剧烈减薄和壳幔相互作用、浅层次的伸展和大型控矿构造的形成。更多还原

【Abstract】 The study of ore-forming chronology indicates that the super-large gold deposits in Jiaodong region were formed in 120±10 Ma.Sr-Nd-Pb isotopic compositions from typical gold deposits suggest that ore-forming materials were derived from the multisources,mantle component was partly involved in mineralization,the deep dynamic processes is the major geological background of large-scale metallogenesis in the Jiaodong region in Mesozoic.The deep processes mainly include effect of post deep-subduction of continental crust of the central orogen belt and distant effect of subduction of the palo-Pacific plate underneath the Eurasian continent.However, lithosphere thinning,crust-mantle interaction,crustal extension and formatiom of large-type ore-controlling structures would be the comprehensive consequences of above-mentional geodynamic processes in the region.更多还原