胶东金矿成矿系统分析

胶东地区中生代形成的内生金矿床类型众多,分布广泛。文章从成矿系统组成的角度,以金矿床的类型、赋存状态,展布特征,成矿深度等为依据,结合中生代区域构造背景、构造演化过程,着重讨论了胶东金矿的成矿物质来源、成矿作用、成矿期后改造。胶东金矿矿集区形成的根本原因在于区域上中国东部中生代岩石圈大规模减薄,以及由此引起的大规模的岩浆活动。各种类型的金矿床是在统一的构造背景下,成矿流体沿构造通道上升形成的形式多样的热液矿床,矿床分布不受岩性控制,而与同期的构造活动密切相关。地球分异早期形成的中生代早期位于下地壳的具有较高金丰度值的太古宙古陆核及元古宙古陆壳是胶东地区金成矿的主要物质基础(矿源岩)。成矿过程中由于壳、幔相互作用导致了成矿流体成分复杂,来源多样。胶东地区未来的金矿勘查,具有广阔的前景,未来的勘查方向应在理论指导下,努力拓展勘查模式和矿床勘查类型。

Analysis on Gold Mineralization System in Shandong Province

.Jiaodong Mesozoic gold deposit within the formation of many types, are widely distributed. Article from the perspective of oreforming system components to the type of gold deposit, occurrence, distriution characteristics, such as forming the basis of depth, combined with the Mesozoic regional tectonic setting, structural evolution, focusing on the Shandong gold mineralization sources, mineralization, mineralization period transformation. Shandong Gold Mining pool is the root cause of the formation of Mesozoic tectonic regime on the transition region, the Mesozoic tectonic regime transformation is one of the manifestations. Various types of gold deposits in the context of a unified structure, ore- forming fluids rise along the channel structure formed by a variety of hydrothermal deposits, deposit distribution from litholo- gy, and tectonic activity and is closely related to the same period. Earth differentiation in the early formation of the early Mesozoic lower crust has a high degree of value Jinfeng ancient Archean and Proterozoic continental nucleus is Jiaodong ancient continental crust material basis of gold mineralization （ore source rocks）. Ore - forming process because of the crust, mantle interaction leads to forming fluid component complex, diverse sources. Jiaodong future gold exploration, and has broad prospects, future exploration should be guided by the theory, efforts to expand the exploration of patterns and types of mineral deposits.