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伏牛山构造带由多条韧性剪切带组成,剪切带中广泛发育同构造变质流体形成的脉体。脉体矿物成分以石英为主,石英脉中石英晶体内发育大量的流体包裹体和气液相包裹体。包裹体成分以含中高盐度水溶液、低CO2、低δ18O～δD以及少量有机质为特征,包裹体的均一温度为170.6～337.8℃,白云母压力计计算出的压力为0.27～0.87 GPa。整个伏牛山构造带变质流体成分和同位素均继承了原岩海底火山喷发的地化特征。伏牛山构造带变质程度以绿片岩相为主,压力较大,具有俯冲带的特性。包裹体的特点均反映了宽坪岩块和二郎坪岩块依次向华北板块下俯冲、汇聚时产生了强变形,弱变质的构造作用。
Funiu Shan structural belt by a number of ductile shear zone composition, extensive development in the shear zone with the formation of metamorphic fluid pulse body. Veins mineral composition of quartz, Quartz vein in the quartz crystal development of a large number of fluid inclusions and gas-liquid inclusions. The inclusions are characterized by medium and high salinity aqueous solution, low CO2, low δ18O ~ δD and a small amount of organic matter. The homogenization temperature of inclusions is 170.6 ~ 337.8 ℃, and the pressure calculated by the white mica pressure gauge is 0.27 ~ 0.87 GPa. All the components and isotopes of the metamorphic fluid in the Funiu Formation have inherited the geochemical characteristics of the submarine volcanic eruption. The degree of metamorphism of Funiushan tectonic belt is mainly of greenschist facies, with great pressure and subduction zone characteristics. The characteristics of the inclusions all reflect that the Kuanping block and the Erlangping block are subducted to the North China plate in turn, resulting in the strong deformation and weak metamorphism.