摘要
本文介绍了中美联合在喜马拉雅地区进行深反射地震测量中采用的数据采集参数，并分析其合理性及采集系统的局限性。结果表明，采用的参数大多是合理的，试验是成功的。激发条件是影响记录质量的关键，单井５０ｍ深５０ｋｇ炸药的炮或者单井２５ｍ深双井组合，５０ｋｇ炸药的炮能够获得来自７０—７５ｋｍ深的Ｍｏｈｏ及Ｍｏｈｏ之下的反射震相。５０ｓ长的记录长度对于水平层的勘探深度可达１５０—１８０ｋｍ。观测系统对低频干扰波不能进行有效的压制，但在数据处理时可用滤波的方法消除低频干扰波的影响。
he paper describes the data collection parameters used in deep reflection survey conducted by Sino-U. S. joint team in Himalaya region, and analyses the rationality of the parameters and the limitation of the data collection system.The explosive conditions are essential to the recording quality. The reflected waves from the Moho 70-75km in depth, and from beneath the Moho were obtained with shots nominally of 50kg dynamite in a single hole 50m deep or 25kg in each of two holes 25m deep as an shot array.50s recording length permits the depth penetration to reach as deep as 150-180km in case of horizontal layers.The observation system can hardly suppress the low frequency noises efficiently. Their influences, can be removed with filtering during data processing.
