地球物理学进展 ›› 2019, Vol. 34 ›› Issue (6): 2301-2308.doi: 10.6038/pg2019DD0046

• 应用地球物理学Ⅰ(油气及金属矿产地球物理勘探) • 上一篇    下一篇

冀西北地区土城子航磁异常特征及找矿研究

刘燕戌1, 李文勇1, 杨冬红2, 路文芬1, 王三民3   

  1. 1. 中国自然资源航空物探遥感中心,北京 100083;
    2. 吉林大学东北亚国际地学研究与教学中心,长春 130026;
    3. 河北省地质调查院,石家庄 050081
  • 收稿日期:2019-02-14 修回日期:2019-09-14 出版日期:2019-12-20 发布日期:2019-12-29
  • 作者简介:刘燕戌,女,1982年生,博士,高级工程师,主要从事地球物理与矿产勘查等研究工作.(E-mail: 7773531@qq.com)
  • 基金资助:
    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.

Study on characteristics of aeromagnetic anomaly and prospecting in Tuchengzi, Northwest Hebei Province

LIU Yan-xu1, LI Wen-yong1, YANG Dong-hong2, LU Wen-fen1, WANG San-min3   

  1. 1. China Aero Geophysical Survey and Remote Sensing Center for Nature Resources, Beijing 100083, China;
    2. International Centre of Geoscience Research and Education in Northeast Asia, Jilin University, Changchun 130026, China;
    3. Hebei Bureau of Geology Surey, Shijiazhuang 050081, China
  • Received:2019-02-14 Revised:2019-09-14 Online:2019-12-20 Published:2019-12-29

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.

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

Abstract: 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.

Key words: Aeromagnetic anomaly, Forward and inverse, Ground inspection, Iron polymetallicdeposits, Prospecting, Tuchengzi in Northwest Hebei

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