小波分析在泰安—忻州折射/宽角反射剖面解释中的应用

泰安—忻州折射/宽角反射剖面穿过鲁西隆起、华北坳陷、太行山隆起几个构造单元,剖面中段穿过河北省的邢台地震区.利用小波多尺度分析处理了该剖面的几炮波形记录,得到邢台地震区和相邻地段的震相特征.结果表明,邢台地震区的下方莫霍面为复杂结构,可能为双层莫霍面,而在相邻地段莫霍面为较清晰的一级间断面.研究区的深反射剖面结果同样表明,邢台地震区的下方莫霍面为壳幔过渡带,并且在中、上地壳有滑脱构造和延伸到莫霍面的深断裂.复杂的莫霍面结构和形态是邢台地震区的深部构造背景.

Application of wavelet analysis in the data interpretation of Tai'an-Xinzhou refraction and wide-angle reflection profile

Tai'an-Xinzhou refraction and wide-angle reflection profile goes throughout the structural units of Luxi uplift,North China depression and Taihang Mountain uplift.And the middle segment of the profile crosses Xingtai seismic area in Hebei Province.A series of waveform records in this profile are processed by using wavelet multi-scale analysis.The phase features of Xingtai seismic area and its adjacent area are obtained.The results show that the Moho below Xingtai seismic area is complex construction,which may be double-layer,but the Moho in the adjacent area presents clearer first-order discontinuity surface.The deep reflection profiles in the researched region also indicate that the Moho below Xingtai seismic area is crust——mantle transitional zone.And in mid-upper crust,there are detachment structure and the deep fault which extends to the Moho.So the complex structure and morpholoy of the Moho are the deep tectonic background of Xingtai seismic area.