【摘要】 利用研究区多条地震测深剖面段观测资料解释及多条剖面段的模型数据计算出了研究区结晶基底及莫霍面深度等深线结果,对该地区地壳深部速度结构与构造进行了较详细研究。结果表明,地壳深部速度结构与构造在纵向和横向上具有明显的不均一性,浅部基底断裂发育;研究区莫霍面等深线总体特征显示出从东向西逐渐加深趋势,局部区域显示异常变化,变化较大的区域在三河平谷和唐山附近,而在其深部,根据地震波动力学及运动学特征和二维速度结构中的地震界面与速度等值线起伏变化,推测有地壳深部断裂带存在,且在地壳内部上、中、下地壳中均显示有低速块体的存在,而且低速块体通常在深部断裂带一侧或两侧上显示。更多还原

【Abstract】 On the basis of observation data of several seismic sounding profiles and model data of multiple profiles section,this paper presents depth contour of the crystalline basement and that of Moho discontinuity of the Capital area,studies the deep crust velocity structure and the tectonic of this area.The deep crust velocity structure and tectonic show strong lateral heterogeneity,shallow basement faults develops well.The Moho surface contour shows the general characteristics of gradual deepening trend from east to west.The highest gradient zone is near Pinggu and Tangshan area in where deep crustal fault zone may exist with low velocity body along the fault zone.更多还原