透射波勘探在寻找金属矿中的探讨  

Transmitted wave exploration discussion on search metal minerals

作　　者：唐小平[1] 刘宽厚[1] 

机构地区：[1]中国地质调查局西安地质调查中心,西安710054

出　　处：《地球物理学进展》2012年第4期1671-1678,共8页Progress in Geophysics

摘　　要：传统地震勘探大都是以考察地层速度界面为主的反射波勘探,而在金属矿勘探中,由于矿体与围岩的物理性质差异较小,所以未必能形成天然的反射界面,从而严重影响了反射波勘探的效果.本文从透射波勘探理论出发,详细阐述了基于极值法波场二次重构技术下,矿体正演地震波场响应特征.再将子空间联合反演技术运用于矿体反演中,并取得实效.说明透射波勘探在固体矿产勘查中具有较强的可行性.Common seismic probe mostly is reflected wave exploration which focuses on exploring stratigraphical boundary, but in Metal Minerals probe, there maybe is no crude reflector, becuse the difference of maters is not big enough between mineral and its wall rock, and as a result of this it is badly that the result of reflected wave exploration. In this paper, we begain with transmitted wave theory, and then discussed mineral seismic wave field response characteristic which base on double wave field reconstruction used extremum method for detail. Lastly,We introduced Shortest Path Method and Sub-Space Inversion Method into mineral inversion successfully, and the result has shew clearly that transmitted wave exploration has rich feasibility and practicability.

关 键 词：透射波勘探 可行性 波场响应 地震波场正演 直接反演 

分 类 号：P631[天文地球—地质矿产勘探]