Qualitatively interpret geophysical anomalies from amplitude.
磁异常幅值 > 500 nT 为高幅值、> 100 nT 中幅值;重力异常 > 5 mGal 为高、> 1 mGal 为中;结合半宽(> 200 m 大范围)与梯度分级判读地质体类型与埋深。
| Item | Formula | Source-Standard |
|---|---|---|
| Anomaly grading | Anomalies are ranked by amplitude, size and shape | Telford WM et al. Applied Geophysics, 2nd ed. Cambridge University Press, 1990 |
| Physical prerequisite | Interpretation requires a physical contrast between target and host | Telford WM et al. Applied Geophysics, 2nd ed. Cambridge University Press, 1990 |
| Verification requirement | Key anomalies should be verified by drilling or sampling before interpretation | Telford WM et al. Applied Geophysics, 2nd ed. Cambridge University Press, 1990 |
物探异常定性解译工具,依据异常幅值、半宽与梯度等形态特征,推断可能地质体类型与埋深,给出多解性推断与置信度,辅助物探成果解释。