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辉长岩包体的主要造岩矿物斜长石、单斜辉石的组构测定结果表明 :条带状辉长岩的斜长石组构为结晶b轴的优选定向 ,推测其成因是在重力作用占主导并伴有低应力的情况下形成的。宏观呈块状的辉长岩 ,在微观组构上仍有定向线理存在。经由组构、岩石密度、矿物组成计算得到的理论波速各向异性与实测波速得到的一致 ,从而表明地震波的各向异性对矿物组构的强烈依赖性。推测道县辉长岩包体的波速各向异性反映了下地壳地震波的一般特征。其组构特征反映了该区中、新生代下地壳的变形特征。
The results of the determination of plagioclase and clinopyroxene, the major rock-forming minerals of gabbro inclusions, show that the plagioclase structure of banded gabbro is the preferred orientation of crystalline b-axis, Gravity dominated and accompanied by low stress formed. Macroregular gabbro, there is still the existence of directional lines in the microstructure. The theoretical wave velocity anisotropy calculated by the structure, rock density and mineral composition is consistent with the measured wave velocity, which indicates the strong dependence of seismic anisotropy on the mineral structure. It is inferred that the wave velocity anisotropy of the gabbro bodies in Daoxian County reflects the general characteristics of the seismic waves in the lower crust. Its structural features reflect the deformation characteristics of the Lower Cenozoic and lower crust in the area.