Depth Estimation of Vertical Dyke by Applying a Simple Equation

A new procedure of depth estimation to the apex of dyke-like sources from magnetic data has been achieved through the application of a derived equation. The procedure consists of applying a simple filtering technique to the total magnetic intensity data profiles resulting from dyke-like bodies, having various depths, widths and inclination angles. A background trending line is drawn for the filtered profile and the output profile is considered for further calculations. Two straight lines are drawn along the maximum slopes of the filtered profile flanks. Then, the horizontal distances between the two lines at various amplitude levels are measured and plotted against the amplitudes and the resulted relation is a sloping line. The constant values of the equation of the least square fitting to the slope line and with the maximum value of the filtered profile multiplied by an empirical factor have been used to determine the depth to dyke-like source. Low errors percentages have been obtained from the application of the present procedure to a large number of dyke-like bodies and to the field example, indicating the successful of the method.