| Different from oil and gas reservoirs mostly burried in sedimentary strata, the geological condi-tions of metallogenic sites are more complex and changeable. Generally, the ore bodies have irregular shapes and are discontinuous, so it is difficult to meet specular reflection (Xu et al., 2009). Moreover, seis-mogeology characteristics from different lithological rocks are of diversity, and even the same lithological rocks influenced by alteration and tectonic show dif-ferent impedance characteristics. When the wave im-pedance difference between the rock and the ore body is small, it is difficult to originate seismic reflection wave. In terms of ore-controlling structures, large faults control intrusive mass and mineralization, and small faults which are difficult to be detect by seismic reflection exploration are closely related to the met-allogenic sites. Based on the Fresnel theory, if the geological body scale is less than the wavelength, the accuracy of seismic reflection imaging will drop dras-tically. However diffraction wave and scattered wave imaging from these small scale and heterogeneous geological bodies have a high or ultra-high resolution. Diffractions imaging can detect and identify under-ground important structural information, such as fracture zone, faults, pinchout, reef boundary, small scale volcano rocks, intrusive bodies, rough surfaces of salt domes, as well as other geological discontinui-ties (Karimpoul et al., 2015). So it is available to de-tect these geological bodies like complex structures and small scale and irregular shape ore bodies by seismic diffractions in theory. |