中文摘要：

有限差别的倒置方法和 Raylnvr 技术被采用了深地震的发出声音解释 Fuliji-Fengxian 的宽角度的地震思考 / 折射数据(决策支持系统) 在更低的 Yangtze 区域介绍，因此速度结构被获得，结论如下被总结：(1 ) 沿着这侧面的速度模型能垂直地被划分成三大层(上面、中间、更低的外壳) 并且六旁边地堵住，并且这速度分布同意稳定的站台的特征。(2 ) Monodiscontinuity 的深度是 30-36 km。上面的外壳的厚度是 10.5 - 13.0 km 在侧面的速度强烈变化的地方，并且速度增加到 6.2 km/s~( 在底部的 -1) 。而且，在中间的外壳和更低的外壳的底部层的速度分布有一个明显的不同类。在中间的外壳的上面的层的速度，中间的外壳的更低的层，更低的外壳并且最高披风是 5.9-6.2， 6.3-6.4， 6.6-7.0 和 8.06-8.29 km/s~(-1), 分别地。( 3 )在二上， Tanlu 的方面指责带( TFB )，中间外壳的速度结构是相当不同的，不过，在速度分发的明显的辨别和边界地形学都不在更低的外壳中展出，因此， TFB 的 Jiashan 片断可能在更低的外壳中在中生代，和差错行为通过整个外壳切了，这被推断由于 Orogenic 延期或外壳的平衡生产的低粘性消失了，当在僵硬中间上面的外壳中的差错特征被保存了直到礼品时。(4 ) 有 Ms】 5.0 附近的 Zhen-jiang 的中等地震与延续到更低的外壳的深差错有关，并且地震被精力可能导致沿着深差错从披风岩石圈转移了 toupper 中间的外壳，并且在一些更好的构造位置聚集了。

英文摘要：

The finite-difference inversion method and Raylnvr technique had been employed to interpret the wide-angle seismic reflection/refraction data of the Fuliji-Fengxian deep seismic sounding （DSS） profile in Lower Yangtze region, hence the velocity structure was acquired and conclusions were summarized as follows： （1） The velocity model along this profile can be divided into three large layers vertically （upper, middle and lower crusts） and six blocks laterally, and this velocity distribution agrees with the feature of stable platform. （2） The depth of Moho discontinuity is 30-36 km. The thickness of the upper crust is 10.5-13.0 km, where the lateral velocity varies strongly, and the velocity increases to 6.2 km/s^-1 at bottom. Besides, the velocity distributions in the bottom layer of middle crust and lower crust have an apparent inhomogeneity. The velocity in upper layer of middle crust, lower layer of middle crust, lower crust and uppermost mantle is 5.9-6.2, 6.3-6.4, 6.6-7.0 and 8.06-8.29 km/s^-1, respectively. （3） On two sides of the Tanlu fault belt （TFB）, the mid-crustal velocity structure is quite different, nevertheless no apparent discrimination in velocity distribution and boundary topography exhibits in lower crust, hence it is inferred that the Jiashan segment of TFB had probably cut through whole crust in the Mesozoic, and the fault behaviour in lower crust had disappeared due to the low viscosity produced by the orogenic extension or crustal balance, while the fault features in the rigid middle-upper crust have been preserved up to the present. （4） The moderate earthquakes with Ms 〉 5.0 nearby Zhenjiang are related to the deep faults extending into the lower crust, and the earthquakes were probably induced by the energy been transferred from mantle lithosphere to upper-mid crust along the deep faults, and aggregated at some preferable tectonic positions.