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山东昌乐第三纪玄武岩中产有刚玉巨晶,内含丰富的原生和假次生流体包裹体和熔融包裹体。流体包裹体可分为CO2单相包裹体、H2O-CO2两相和三相包裹体。熔融包裹体类型复杂,其中富流体相包裹体可分为含CO2收缩气泡两相熔融包裹体和气-液-固多相熔融包裹体。诸类包裹体主要赋含在刚玉晶核外的“主体”部分,以CO2单相流体包裹体和两相熔融包裹体最为发育,并且不同类型包裹体常密切伴生,表明它们形成时流体发生了不混溶作用:出现熔浆相(富含挥发分)、气相(CO2为主)和富水相(H2O-CO2为主)等多相体系。激光拉曼分析结果显示,各类包裹体中的气体组分主要是CO2,另有不等量的N2和H2S,据此划分为纯CO2、CO2-N2、CO2-H2S和CO2-N2-H2S等气体组合类型,没有发现O2、CH4和H2等组分。此外,拉曼分析也证实了流体包裹体和熔融包裹体中存在H2O。上述资料表明,昌乐地区深部流体以CO2为主,同时包含H2O、N2和H2S在内的多种组分,这些流体组分也是刚玉母浆系统的重要成分。
Tertiary rocks in Changle, Shandong Province, middle-yielding corundum megacrysts, rich in primary and secondary fluid inclusions and melt inclusions. Fluid inclusions can be divided into single-phase CO2 inclusions, H2O-CO2 two-phase and three-phase inclusions. The types of melt inclusions are complex, in which the rich fluid inclusions can be divided into two-phase fused inclusions containing CO2 shrinkage bubbles and gas-liquid-solid multiphase melt inclusions. All kinds of inclusions are mainly contained in the “main part” outside the corundum crystal nucleus. CO2 single-phase fluid inclusions and two-phase melt inclusions are the most developed, and different types of inclusions are often closely associated, indicating that the fluid was formed when they were formed Immiscibility: A multiphase system such as slurry phase (rich in volatile matter), gas phase (mainly CO2) and water-rich phase (mainly H2O-CO2) appears. The results of laser Raman analysis show that the gas components in all kinds of inclusions are mainly CO2 and there are different amounts of N2 and H2S, which are divided into pure CO2, CO2-N2, CO2-H2S and CO2-N2-H2S And other gas combination types, found no O2, CH4 and H2 and other components. In addition, Raman analysis also confirmed the presence of H2O in fluid inclusions and melt inclusions. The above data indicate that the deep fluid in Changle area is dominated by CO2 and contains many components including H2O, N2 and H2S. These fluid components are also important components of the corundum slurry system.