Key techniques for seismic data processing of deep metal deposits:A case study of the Chaganhua molybdenum orefield in Inner Mongolia
YUE Hang-Yu1,2,3,4(), WANG Xiao-Jiang2,3(), WANG Lei5, CHEN Xiao-Qiang1, JIANG Chun-Xiang2,3, LI Pei2,3, ZHANG Bao-Wei1,2,3
1. Center for Geophysical Survey,China Geological Survey,Langfang 065000,China 2. Institute of Geophysical and Geochemical Exploration,Chinese Academy of Geological Sciences,Langfang 065000,China 3. National Center for Geological Exploration Technology,Langfang 065000,China 4. School of Geophysics and Information Technology,China University of Geosciences (Beijing),Beijing 100083,China 5. Liaoning Institute of Geology and Mineral Resources Co., Ltd.,Shenyang 110032,China
Deep metal deposits tend to be associated with heterogeneous geological bodies on different scales.Moreover,their orefields mostly lie in areas with complex geological structures,developed faults,and intense lithological changes and have complex surface conditions and structures.As a result,the seismic data of metal deposits frequently originate from complex and variable seismic wave fields suffering the mutual inference of multiple types of waves.Therefore,the seismic data have extremely low signal-to-noise ratios,which severely restricts the seismic interpretation of metal deposits and the prediction of concealed orebodies. With the 2D seismic data of the Chaganhua molybdenum orefield in Inner Mongolia as a case study,this study explored the key techniques for the seismic data processing of deep metal deposits.Specifically,this study analyzed the characteristic of seismic data of the Chaganhua molybdenum deposit and summarized the difficulties with seismic data processing of the metal deposit.Based on these,this study developed a set of processes for the data processing of the Chaganhua molybdenum orefield.The actual processing results agree well with the known orebody distribution in the geological borehole section.To be specific,zones with thick ore bodies generated strong reflected energy,while thinner ore bodies exhibited low-amplitude reflected waves.The results of this study can provide strong support for inferring geological structures and delineating concealed orebodies in the study area.
岳航羽, 王小江, 王磊, 陈孝强, 姜春香, 李培, 张保卫. 深部金属矿地震数据处理关键技术研究——以内蒙古查干花钼矿区为例[J]. 物探与化探, 2022, 46(6): 1315-1326.
YUE Hang-Yu, WANG Xiao-Jiang, WANG Lei, CHEN Xiao-Qiang, JIANG Chun-Xiang, LI Pei, ZHANG Bao-Wei. Key techniques for seismic data processing of deep metal deposits:A case study of the Chaganhua molybdenum orefield in Inner Mongolia. Geophysical and Geochemical Exploration, 2022, 46(6): 1315-1326.
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