内蒙古准苏吉花铜钼矿区三分量地震试验研究

Three-component seismic experimental study of the Zhunsujihua Cu-Mo mine in Inner Mongolia

三分量地震技术在能源勘探中发挥了重要作用,并取得了明显的地质效果.在金属矿勘探中,三分量地震的效果如何,有助于解决什么样的地质问题,还未曾开展过这方面的试验研究.为探讨三分量地震技术在金属矿勘查中的探测效果,我们在对内蒙古准苏吉花铜钼矿区钻孔岩心标本进行密度和速度测试的基础上,开展了三分量地震试验研究.试验采用炸药震源激发,单个正交28 Hz三分量检波器接收,多次覆盖的工作方法.通过对三分量地震数据进行处理,获得了能够用于解释的纵波和转换波地震剖面.分析纵波和转换波地震剖面能够看出,纵波剖面上的波组特征更明显,转换波剖面上的信息量更大,把两者进行综合解释,有利于金属矿地震资料的解释.利用所获得岩矿石弹性参数和地质资料,对获得的试验地震剖面进行了解释,根据试验剖面上的地震波组特征,认为在该8勘探线地质剖面以外NE一侧,有可能寻找到深部隐伏金属矿.

Three-component seismic technology has played an important role in energy exploration, and achieved remarkable geological effects. In seismic prospecting for metal ore,the threecomponent seismic is helpful to solve what kind of geological problems,experimental research about this respect has not been carried out. In order to discuss the detective effect of threecomponent seismic technology in metal mine exploration,we carry out the three-component seismic experiments of the Zhunsujihua CuMo mine in Inner Mongolia based on density and velocity test of drill core samples. The working methods of dynamite source simulating and single orthogonal 28 Hz three-component geophone receiving as well as multiple coverage are adopted in the trial. The p-wave and converted-wave seismic sections obtaining can be used to interpret through the processing of three-component seismic data. It can be seen that characteristics of wave group are more obvious on p-wave section,information amount are larger on converted-wave section through analysis of longitudinal wave and converted-wave seismic data. To interpret comprehensively both data is beneficial to interpretation of metal ore seismic data. The experimental seismic sections are explained using the geological data and the elastic parameters of rocks and minerals obtained. It can be inferred that the deep hidden metal can be searched in the NE side of outside No. 8 geological section based on the characteristics of reflections of experimental seismic section.