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鲁西台背斜东缘沙沟地区深熔型花岗岩质量平衡分析表明:(1)以体积守恒为限制条件,深熔型二长花岗质片麻岩带入1.90%~1.92%的质量,微斜长石花岗岩带入4.46%~4.55%的质量,深熔型花岗岩类有K2O、SiO2、Rb、Ba的获得,TiO2、Al2O3、FeO、Fe2O3、MnO、MgO、CaO、Na2O、P2O5及Cr、Ni、Co、Sr、Zr、Ta、Nd则损失(残留);(2)花岗岩类的质量等比线显示:母岩及深熔型花岗岩没有明显的质量损失;而英云闪长质(花岗闪长质)片麻岩—微斜长石花岗岩则有明显的质量带入、带出;微斜长石花岗岩有K2O、SiO2、Rb、Nd、Ta的明显获得,其余氧化物和微量元素则损失;(3)深熔型微斜长石花岗岩是熔体经过一定距离运移、聚集结晶而成,但基本未脱离深熔地体体系的半原地花岗岩,而二长花岗质片麻岩则是就地定位、基本没有运移的原地花岗岩。
Mass balance analysis of deep-melting granite in Shagou area, eastern margin of Laxitai anticline shows that: (1) Taking the conservation of volume as the limiting condition, the deep-melt type granitic gneiss brought 1.90% -1.92% The microstructures of fine plagioclase feldspar are characterized by the mass of 4.46% ~ 4.55%, the deep-melting granites with K2O, SiO2, Rb and Ba, TiO2, Al2O3, FeO, Fe2O3, MnO, CaO, Na2O, P2O5 and Cr, Ni, Co, Sr, Zr, Ta and Nd will be lost (residual); (2) The isometric line of granite shows no obvious mass loss of parent rock and deep- While the Yingyun dioritic (granodiorite) gneiss-plagioclase feldspar granite has obvious mass, which is brought out. The micro-plagioclase feldspar granite has obvious K2O, SiO2, Rb, Nd and Ta Obtained, and the rest of the oxide and trace elements are lost; (3) deep melt type plagioclase feldspar is the migration of the melt through a certain distance, gathered Crystal made, without departing from the basic melt depth to half situ granite body system, and two long gneiss is positioned in place, substantially no migration situ granite.