冀东南部航磁ΔT低缓异常化极下延特征及其对深部找矿的指导意义  

Downward continuation characteristics and guiding significance for deep ore exploration of reduction-to-the-pole of aeromagneticΔT low and gentle anomaly in southeastern Hebei

作　　者：赵嘉炜 张云鹏 刘志远 柴泉 王璇 王森 ZHAO Jiawei;ZHANG Yunpeng;LIU Zhiyuan;CHAI Quan;WANG Xuan;WANG Sen(Institute of Geological Survey of Hebei Province,Shijiazhuang 050081,Hebei,China)

机构地区：[1]河北省地质调查院,河北石家庄050081

出　　处：《吉林地质》2023年第3期51-58,共8页Jilin Geology

摘　　要：本次研究使用河北省1∶2.5万高精度航空磁测资料。通过对航磁数据进行化极、向下延拓数据处理,对冀东地区3处典型航磁异常不同深度的下延效果进行对比分析,确定磁性体顶板位置。结合钻孔验证结果,讨论了深部矿体在航磁数据向下延拓曲线上的特征,表明了大比例尺高精度航空磁测在寻找深部铁矿上有很大作用,该研究对解决覆盖区深部找矿及危机矿山等问题具有重要意义。In this paper,the authors use 1∶25000 high-precision aeromagnetic survey in Hebei Province.After a series of processing of aeromagnetic data such as reduction-to-the-pole and downward continuation,the downward continuation effects of three typical aeromagnetic anomalies at different depths in Eastern Hebei are compared and analyzed,and the position of magnetic body roof is determined.Combined with the drilling verification results,the characteristics of deep ore body on the downward continuation curve of aeromagnetic data are discussed,which shows that large-scale and high-precision aeromagnetic survey plays a great role in finding deep iron ore.This study has important significance in solving problems such as deep ore exploration and crisis mines in the coverage area.

关 键 词：航空磁测 化极 下延 深部找矿 

分 类 号：P631[天文地球—地质矿产勘探]