| 邓友茂,施苏利,孙诚业,徐梦龙,王振亮.浅谈地面高精度磁测过程中磁异常计算与精度分析[J].矿产勘查,2025,16(9):2148-2154 |
| 浅谈地面高精度磁测过程中磁异常计算与精度分析 |
| Discussion on the calculation and precision analysis of magnetic anomaly in ground high precision magnetic survey |
| 投稿时间：2024-02-10 |
| DOI：10.20008/j.kckc.202509008 |
| 中文关键词: 磁异常 日变站基值 地磁正常场 国际地磁参考场 |
| 英文关键词: magnetic anomaly base value of daily magnetic station magnetic normal field international geo-magnetic reference field |
| 基金项目:本文受中国地质调查局项目(DD20242909、DD20240024)、中国地质科学院基本科研业务费项目(JKYQN202351)与中央级公益性科研院所基本科研业务费专项(JY202101)联合资助。 |
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| 中文摘要: |
| 本文通过分析现行《地面高精度磁测技术规程》在日变站基值确定过程中的规定，并比较其他“规范”关于日变站基值的确定过程，提出在地磁日变站基值确定过程中，将地磁场平稳时段的时间范围控制在凌晨前后 2h内，以便提高日变站基值的准确性。分析等值线法和近似公式法在磁异常计算中产生的误差，提出利用国际地磁参考场进行地磁正常场改正，替代规程中的等值线法和近似公式法。最后以南方某地实测磁异常剖面为例，分析利用“地面高精度磁测技术规程”与“国际地磁参考场”模型所计算磁异常的差别，证明此模型所计算的磁异常值，更能有效地体现地质体的信息。 |
| 英文摘要: |
| By analyzing the provisions of the current "Technical Specification for Ground High Precision Mag-netic Survey" in the process of determining the base value of daily magnetic station, and comparing the other specifi-cations in the process, it is proposed to control the time range of the stationary period of the geomagnetic field within2 hours before and after the morning in the process. Analyze the errors produced by the contour line method and the approximate formula method in the calculation of magnetic anomalies, it is also proposed to use the InternationalGeomagnetic Reference Field to correct the magnetic normal field instead of the contour method and approximateformula method in the regulations. Finally, taking the measured magnetic anomaly profile in a certain area in thesouth as an example, the differences between the magnetic anomalies calculated using the "Technical Specificationfor Ground High Precision Magnetic Survey" and the "International Geomagnetic Reference Field" model were ana-lyzed, it was proved that the magnetic anomaly values calculated by the model can more effectively reflect the infor-mation of geological bodies. |
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