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通过对阿尔金北缘地区铜金矿床的硫同位素研究,结合矿床地质特征,划分了区内矿床的成因类型,认为主要有3类:似层状海相火山沉积型铜多金属矿床、韧性剪切带型(铜)金矿床、受裂隙控制的脉状岩浆热液型铜多金属矿床。结合区域构造演化特点,探讨了矿床成因类型与区域构造演化阶段的关系,认为区域成矿作用可分为3个阶段:第一阶段为早古生代早中期板块构造海底扩张作用时期,形成以喀腊大湾为代表的海相火山沉积型铜多金属矿床;第二阶段是早古生代晚期板块构造聚合碰撞作用时期,形成以大平沟和红柳沟为代表的韧性剪切带型(动力变质热液型)(铜)金矿床;第三阶段是早古生代末板块构造碰撞后的岩浆活动和偏脆性断裂构造活动时期,形成以索尔库里北山和拉配泉为代表的受裂隙控制的岩浆热液型铜多金属矿床。从硫同位素特征、矿床成因类型及其与区域构造演化的关系上分析,该区具有较好的铜金多金属矿床找矿远景。
By studying the sulfur isotopes of the Cu-Au deposits in the northern margin of the Altyn Tagh, and combining with the geological characteristics of the deposits, the genetic types of the deposits in the area are classified. There are mainly three types of deposits: stratified marine volcano-sedimentary copper polymetallic deposits, ductile shear Belt-type (copper) gold deposit, vein-like magmatic hydrothermal copper-polymetallic deposits controlled by fractures. Based on the characteristics of regional tectonic evolution, the relationship between genetic types and regional tectonic evolution stages of the deposits is discussed. It is considered that the regional mineralization can be divided into three stages: the first stage is the period of the early Paleozoic tectonic submarine expansion in the Early Mesozoic, Dawang Basin. The second stage is the period of collision and accumulation in the late Paleozoic plate tectonics and the ductile shear zone (represented by Dapinggou and Hongliugou) ) (Copper) gold deposit. The third stage is the magmatic activity during the collision of Early Paleozoic end plate tectonics and the period of tectonic activity of partial brittle fracture. The fractured-controlled magmatic hydrothermal fluid, represented by the Soolcuri Beishan and Lazuquan, Type copper polymetallic deposits. Based on the characteristics of sulfur isotopes, genetic types of deposits and their relationship with regional tectonic evolution, this area has good prospects for prospecting for copper-gold polymetallic deposits.