Modelling Magnetic Anomalies In Low Inclination Fields – A Malaysian Case Study

Modelling of Total magnetic intensity (TMI) and<br>vertical component (VC) anomalies over a<br>serpentinite body near Senaling in Malaysia at a<br>geoinclination of -13° resulted in similar source<br>models with no advantage in the modelling of one<br>field over the other. The analytic signal (AS)<br>produced similar results for both fields and resolved<br>two source bodies which appear as a single source in<br>the TMI and VC images. The first vertical derivative<br>(FVD) and AS enhancements highlighted departures<br>between observed and model data and 1-D versions<br>of these enhancements provided a valid and more<br>convenient implementation for modelling profile<br>data. Modelling of the complete anomaly provided<br>particular advantage over single-profile modelling in<br>the low-inclination field.