中文摘要：

为研究芦花台断裂的空间展布特征、断裂的活动性以及断裂向下的延伸形态，以芦花台断裂为中心布设了一个550m×875m的三维地震探测区。探测结果表明，芦花台断裂由两条隐伏活动断裂组成，断裂带走向N20°～22°E，最新活动时代为中更新世末期。主断裂F1倾向SE，次断裂F2倾向NW，都是正断层。主断裂F1的活动时代比次断裂F2新，断距也比次断裂F2的大，F1的上断点埋深在工作区内具有自北向南逐渐加深的趋势。在工作区内断裂F1和F2在平面上的距离由北向南逐渐增大，在垂直剖面上的距离随着深度的增加逐渐减小，大约在深度780～800mF2断裂归并到F1断裂上。

英文摘要：

In order to investigate geometry shape and activity of Luhuatai Fault Zone which locates in the north- west Yinchuan Basin, a 3D seismic exploration was completed whin an area of 550 m x 875 m. The results show that it is a buried active fault zone and consisted of two faults, main fault Fi and secondary fault F2. The fault zone moved untill the late stage of Middle Pleistocene. Trend of F1 is SE, and F2 is NW, both of them are normal faults. The ac- tivity time of F1 is newer than that of F2 , and the fault throw of F1 is larger than that of F2. The buried deepth of the up-breakpoint of Fl has a trend of increasing from North to South. The distance between F1 and F2 increases gradu- ally from North to South on the horisontal plane, reduces gradually with depth increase on the vertical profile, and F2 merges into F1 at the depth of about 780 -800 m.