物探与化探2025，Vol.49Issue(5)：1018-1029,12.DOI:10.11720/wtyht.2024.1507
庐枞盆地正长岩的地球物理识别基础
Basis for geophysical identification of syenites in the Luzong Basin
摘要
Abstract
The Fe-Cu-U mineralization in the Luzong area in Anhui Province occurs primarily within the syenite mass and along its con-tact zone with surrounding rocks.Effectively delineating the syenite mass using geophysical exploration methods is a scientific issue that needs to be addressed urgently for mineral exploration breakthroughs in the Luzong area.Therefore,based on 358 rock samples from scientific drilling borehole ZK01 at a burial depth of 2 012 m in the Luzong area,this study measured their petrophysical properties,in-cluding density,magnetism(magnetic susceptibility and remanent magnetization intensity),electrical properties(resistivity and polar-izability),and elastic wave velocity.The results indicate that syenites manifested low density and weak magnetic characteristics,provi-ding prerequisites for syenite identification through gravity and magnetic explorations in borehole ZK01 or similar geological conditions.The strata and syenite-monzonite masses in the borehole exhibited medium-to-high resistivity characteristics with nonsignificant differ-ences,increasing the difficulties in electrical prospecting.The syenite-monzonite masses displayed lower compressional and shear wave velocities compared to the volcanic layer in the Zhuanqiao Formation,laying a foundation for distinguishing strata from rock masses through seismic exploration.关键词
庐枞盆地/正长岩/密度/磁性/电性/波速/特征Key words
Luzong Basin/syenite/density/magnetism/electrical property/wave velocity/characteristic分类
天文与地球科学引用本文复制引用
李磊,段壮..庐枞盆地正长岩的地球物理识别基础[J].物探与化探,2025,49(5):1018-1029,12.基金项目
科技基础资源调查专项项目(2022FY101800) （2022FY101800）
中国地质调查局项目(DD20230245) （DD20230245）
