点散射成像方法在阿舍勒铜矿地震勘探的应用  

Application of Point Scattered Seismic Imaging Method in Seismic Exploration of Ashele Copper Mine

作　　者：武秀江 赵民 郭大伟 赵豫 刘平 张冉 Wu Xiujiang;Zhao Min;Guo Dawei;Zhao Yu;Liu Ping;Zhang Ran(Mineral Resources Exploration Center of Henan Geological Bureau,Zhengzhou Henan 450053,China;Henan Provincial Natural Resources Innovation Center(Research on Geophysical Deep Exploration),Zhengzhou Henan 450053,China)

机构地区：[1]河南省地质局矿产资源勘查中心,河南郑州450053 [2]河南省自然资源创新中心(地球物理深部探测研究),河南郑州450053

出　　处：《工程地球物理学报》2024年第6期1050-1058,共9页Chinese Journal of Engineering Geophysics

基　　金：河南省地质勘查专项基金(编号:豫地[2021]136)。

摘　　要：金属矿大多是多期段、多种成矿作用叠加改造的结果,岩石类型多为变质岩和岩浆岩,地层界面连续性差,矿体规模一般较小,有的甚至小于一个地震波长,易产生地震散射或绕射波,相对来说,反射波较弱。对金属矿地震数据的处理,基于水平层状地质模型的常规反射波地震数据处理方法效果不佳,而散射波处理技术较具优势。本文以阿舍勒铜矿地震勘探为实例,对采集的地震数据,基于点散射物理原理,利用散射波处理方法进行数据处理,最终获得的地震时间剖面与反射波处理方法相比信噪比更高,地质信息更加丰富,对于类似地区开展相关工作具有一定的借鉴作用。Most of the metalliferous deposits result from the superposition and reconstruction of multiple mineralization in multiple stages,with metallic ores mostly found in metamorphic and magmatic rocks.These ore deposits typically have poorly defined boundaries and the ore bodies are generally small in size,and sometimes even smaller than one seismic wavelength.In such cases,seismic scattered or diffraction waves are more likely to occur,while reflected waves are relatively weak.Consequently,conventional seismic reflection exploration method,based on the geological model of horizontally layered sedimentary rock,is no longer applicable.Instead,processing technologies that focus on scattered waves are more suitable.This article examines seismic exploration at the Ashele copper mine,employing scattered wave processing method to analyze the collected seismic data based on the physical model of point scattering.The resulting seismic profile exhibits a higher signal-to-noise ratio and provides richer geological information than the conventional seismic reflection wave processing method.This work offers a certain reference value for carrying out seismic exploration in similar regions.

关 键 词：点散射成像方法 散射波 速度分析 金属矿 地震勘探 

分 类 号：P631.4[天文地球—地质矿产勘探]