根据地质资料,柴达木盆地的基岩(结晶基底)埋藏深度,可达十公里以上.勘探这样深的基岩,利用反射和一般折射方法是不容易得到良好的效果.1958年6月,在柴达木盆地开始试验低频地震的方法,来接收基岩面的折射波.所用检波器的谐振频率为13周/秒,放大器最低谐振频率为8周/秒.最大接收距离为100公里左右. According to the geological data, bedrock (crystalline basement) buried depth of the Qaidam Basin can reach more than 10 kilometers, exploration of such deep bedrock is not easy to get good results by reflection and general refraction method.In June 1958, In the Qaidam Basin began to test low-frequency seismic method to receive bedrock refracted wave.The detector used in the resonant frequency of 13 weeks / second, the amplifier resonant frequency of the lowest 8 weeks / second. The maximum receiving distance of 100 km .