摘要
本文基于最新实测的冀西北地区高精度航空磁测数据,利用化极、解析延拓、垂向导数、水平梯度模及欧拉反褶积场源深度计算等方法,重点分析了土城子航磁异常特征及其地质成因,并结合地面查证资料研究了航磁异常与成矿之间的关系.结果表明:土城子航磁异常强度较高、规模较大,应为隐伏磁铁矿引起的矿致异常.地面磁测异常、激电异常及主成矿元素异常与航磁异常均具有内在的联系和可比性,岩(矿)体具有"强磁、低阻、高极化"的特征,赋矿地层中Pb、Zn等成矿元素相对富集,研究区具有良好的铁多金属找矿潜力.
Based on the recent measured high-precision aeromagnetic data of northwest Hebei in China,we analyzed the characteristics of Tuchengzi aeromagnetic anomaly and its geological genesis,then studied the relationship between aeromagnetic anomaly and mineralization combining with ground inspection data.The results show that Tuchengzi aeromagnetic anomaly has high intensity and scale,it caused by concealed magnetite body.The ground magnetic anomaly,IP anomaly and the main ore-forming element anomalies have intrinsically related to aeromagnetic anomaly.The rock(ore)has the characteristics of"strong magnetic,low resistivity,high polarization,high density".Pb、Zn and other metallogenic elements are fairly rich in the ore-bearing strata.The research area has prospecting potential of iron polymetallic deposits.
作者
刘燕戌
李文勇
杨冬红
路文芬
王三民
LIU Yan-xu;LI Wen-yong;YANG Dong-hong;LU Wen-fen;WANG San-min(China Aero Geophysical Survey and Remote Sensing Center for Nature Resources,Beijing 100083,China;International Centre of Geoscience Research and Education in Northeast Asia,Jilin University,Changchun 130026,China;Hebei Bureau of Geology Surey,Shijiazhuang 050081,China)
出处
《地球物理学进展》
CSCD
北大核心
2019年第6期2301-2308,共8页
Progress in Geophysics
基金
中国地质调查局项目“松辽盆地及外围航空物探调查”(DD20190028)资助
关键词
航磁异常
正反演
地面查证
铁多金属矿
找矿
冀西北土城子
Aeromagnetic anomaly
Forward and inverse
Ground inspection
Iron polymetallicdeposits
Prospecting
Tuchengzi in Northwest Hebei
