山东胶东型金矿的概念及其特征

The Concept and Characteristics of Jiaodong Type Gold Deposits,Shandong Province

胶东型金矿是指产于胶东地区,在同一大地构造背景控制下,由相同的热液成矿作用在断裂构造带的不同部位、不同围岩条件下形成的具有成因相同、形成时代相近的一系列金矿自然类型组合,它不是单一的矿床类型,而是反映构造环境、成矿背景、成矿物质来源与成矿规律的金矿成因系统。胶东型金矿是与壳源重熔形成的层状岩浆岩和壳幔混合型花岗岩有关的金矿床类型的统称,具有独特的成矿条件和成矿作用,涵盖了构造破碎带蚀变交代型、裂隙充填石英脉型、裂隙充填富硫化物石英脉型、层间滑脱拆离带型、构造角砾岩型和碳酸盐岩中裂隙充填蚀变型等胶东所有金矿成因类型,由于成矿时所处构造位置和容矿空间不同而表现为不同金矿类型的集合体。胶东型金矿特征集中体现在3期成矿热事件、3个成矿系列和3期成矿作用上,与金矿关系密切的是玲珑、郭家岭和伟德山3个构造—岩浆热事件,即与胶北地区晚侏罗世玲珑花岗岩有关的钼(钨)—金矿成矿系列、与早白垩世中酸性岩浆有关的金(银)矿成矿系列和与早白垩世中酸性岩浆有关的铜—铅—锌—钼—金矿成矿系列,对应于胶东金矿的早成矿期、主成矿期和叠加成矿期。胶东型金矿表现形式为北东成串、东西成带,断裂是最主要的控矿形式,具有脆性断裂控矿、金矿床等间距性分布和侧伏特征等规律。胶东型金矿具有全新的金矿成因内涵,它反映的既有矿床类型的组合又有成因特征的鲜明特色,是对金矿成矿理论的提升和升华。

Jiaodong type gold deposits were distributed in Jiaodong region.As a series of natural gold type combination, these deposits were formed in the same tectonic background environment, formed from the same gold mineralization during a same period,formed in different tectonic position and different surrounding rock conditions.It is not a single ore deposit type, but a whole gold ore formation system reflecting tectonic environment, metallogenic background, metallogenic material source and metallogenic regularity.Jiaodong type gold deposits has a unique metallogenic conditions and metallogenesis, covers all types of gold deposits in Jiaodong, such as fracture zone altered rock type, quartz vein type ,rich sulfide quartz vein type, interlayer detachment zone type, tectonic breccia type and Liaoshang type etc.Jiaodong gold deposit is formed by the crust source remelting with layered magmatic rocks and crust-mantle mixed type of gold deposits related to granite collectively.Jiaodong gold ore characteristics embodied in the three periods of gold metallogenic thermal events, three gold metallogenic series and three periods of gold mineralization, and what is closely associated with gold deposit is Linglong, Guojialing and Weideshan tectonie-magmatic thermal events.The Mo （W）-Au ore metallogenic series related to the late Jurassic Linglong granite in north of Jiaodong region,the Au （Ag） ore metallogenic series related to the Early Cretaceous intermediate-acid magma,and the Cu-Pb-Zn-Mo-Au ore metallogenic series related to the Early Cretaceous intermediate-acid magma,corresponding to the early Jiaodong gold ore mineralization,main metallogenic period and superimposed mineralization.Jiaodong gold ore characteristics is that the deposits show equally spaced distribution, as the northeast string, things into a zone.Ore vein is under the control of brittle fault obviously.Jiaodong type gold deposits have new gold ore genesis connotation.It not only reflects the combination of both the deposit type, but also shows a genetic feature of distinctive features.It is to ascend and sublimation of the theory of gold.