反射地震勘探在南陵 宣城矿集区地质找矿中的应用研究  

Application of Reflection Seismic Exploration in Geological Prospecting of Nanling-Xuancheng Ore Concentration Area

作　　者：谭静[1] 熊强青 喻兵良 陈杰 袁兴赋 郭冬[1] 陆三明[2] 兰学毅 Tan Jing;Xiong Qiangqing;Yu Bingliang;Chen Jie;Yuan Xingfu;Guo Dong;Lu Sanming;Lan Xueyi(Geological Exploration Technology Institute of Anhui Province,Hefei Anhui 230031,China;Public Geological Survey Management Center of Anhui Province,Hefei Anhui 230091,China)

机构地区：[1]安徽省勘查技术院,安徽合肥230031 [2]安徽省公益性地质调查管理中心,安徽合肥230091

出　　处：《工程地球物理学报》2021年第6期848-855,共8页Chinese Journal of Engineering Geophysics

基　　金：安徽省公益性地质工作项目(编号:2018-g-1-4);国家重点研发计划课题(编号:2016YFC0600209)。

摘　　要：南陵-宣城矿集区是长江中下游成矿带新一轮找矿工作的重点勘查区。为了查明矿集区深部结构特征,获取深部找矿地质信息,通过部署穿过麻姑山矿区的二维地震剖面,开展了有针对性的地震数据采集试验以及地震成像剖面的综合研究,总结出了一套适合典型矿集区的地震数据采集方法,取得了较高信噪比的地震资料。本次地震勘探成果完整地揭示了矿集区的地质构造格架,自北西向南东依次为新河庄倒转背斜、周村盆地、敬亭山背斜、宣城断陷盆地、麻姑山背斜、广德断陷和虾子岭背斜。区内盆地多为断陷盆地,背斜构造多为推覆而成,在测线中段麻姑山东侧深部有大型隐伏岩体存在,该岩体为研究区提供了重要的找矿线索。本文研究成果为长江中下游成矿带深部找矿勘查工作提供了地球物理依据。Nanling-Xuancheng ore concentration area is one of the key exploration areas for a new round of prospecting work in the metallogenic belt of the middle and lower reaches of the Yangtze River.In order to identify the deep structural characteristics of ore concentration area and obtain the deep prospecting geological information,2D seismic profile across Magushan mining area is deployed.Through the targeted seismic data acquisition test and the comprehensive study of seismic imaging section,a set of seismic data acquisition method suitable for the typical ore concentration area are summarized.And the seismic data with high signal-to-noise ratio are obtained.The results of this seismic exploration have completely revealed the geological structural framework of the ore concentration area.From northwest to southeast,the area is characterized by Xinhezhuang inverted anticline,Zhoucun basin,Jingtingshan anticline,Xuancheng fault basin,Magushan anticline,Guangde fault basin and Xiaziling anticline successively.Most of the basins in the area are faulted basins,and most of the anticlines are formed by nappes,and are thus thrusted.In the middle part of the survey line,there is a large concealed rock mass in the east side of Magushan,which provides important prospecting clues for the study area.The results in this study can provide geophysical basis for deep prospecting and exploration works in the metallogenic belt of the middle and lower reaches of the Yangtze River.

关 键 词：反射地震勘探 地震数据采集 地震资料处理 复杂构造区 金属矿 

分 类 号：P631.4[天文地球—地质矿产勘探]