interpretating magnetic data

Jun 28th, 2015
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The techniques employed for interpretating magnetic data have many similarities to those on which gravity interpretation is based. This is be expected in view of the fact tha t the laws of potential theory are fundamental to both methods. The similarities are the greatest when one compares gravity data (for which the acceleration is always vertical)

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The techniques employed for interpretating magnetic data have many similarities to those on which gravity interpretation is based. This is be expected in view of the fact tha t the laws of potential theory are fundamental to both methods. The similarities are the greatest when one compares gravity data (for which the acceleration is always vertical) with total-field magnteic data that have been reduced to the pole, a processing technique presented in se. 17-2. This step transfroms the total field data measured at an arbitrary magnetic latitude to the data that recorded over vertically magnetized odies in a vertical magnetic field pointing down 9 as it is at the north magnetic pole). With this technique and symmetric bodies, symmetric anomalies will be displayed centered over the causative body, an aid to the interpretation and comparism of anomalies.Airbone and ship-towed magnetometers, as well as land instruments other that the flux-gate type, record total fields, the most common magnetic filedmeasurement today. The challange of developing fast, accurate, and automated total-filed interpretation methods and the large amount of aribone and shipborne data avaible for such analysis have stimulated the development of many ingenious computer techniques for this purpose. The literature on the subject has been particularly voluminous since the middle 1960.Earlier editions considered single-component (ver tical or horizontal and total-field interpretation separately and presented

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