CAJ | 학술논문

尕龙格玛铜锌多金属矿区岩浆活动强烈，火山岩分布广泛，其展布受区域构造的控制作用明显。通过野外地质调查及对尕龙格玛铜锌多金属矿区火山岩系的岩石矿物组合和结构构造、岩石化学成分、地球化学特征的研究，初步确定了矿区的火山机构及其岩相构造的基本特征。通过对该区英安岩地球化学特征的分析，揭示了矿区在三叠纪时期处于岛弧的大地构造背景；英安岩的形成可能是由于古特提斯洋壳俯冲，引起幔源物质与深海沉积岩共同熔融形成的基性岩浆不断分异演化而形成的。
소룡격마동자다금속광구암장활동강렬，화산암분포엄범，기전포수구역구조적공제작용명현。통과야외지질조사급대소룡격마동자다금속광구화산암계적암석광물조합화결구구조、암석화학성분、지구화학특정적연구，초보학정료광구적화산궤구급기암상구조적기본특정。통과대해구영안암지구화학특정적분석，게시료광구재삼첩기시기처우도호적대지구조배경；영안암적형성가능시유우고특제사양각부충，인기만원물질여심해침적암공동용융형성적기성암장불단분이연화이형성적。
Magmation is severe in Galonggema Cu-Zn polymetallic mining area,and volcanic rocks which are controlled by regional tectonics are widely distributed.Based on field geological investigation and indoor research on rock constituents and structural tectonics,petrochemical components,and geochemical characteristics of volcanic rock series in Galonggema Cu-Zn polymetallic mining area,the characteristics of volcanic edifice and its petrographic structure are initially verified.Analysis on geochemical characteristics of dacite in this area indicates that the mining area in the Triassic period was within geotectonic setting of island arcs; the dacite was formed by differential evolution of basic magma which was formed by fusion of mantle-derived material and deep ocean sediment which was resulted from underthrusting of Paleotethys ocean crust.