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Mohamed Hamoudi, University of Science and Technology Houari Boumediene -USTHB- (Algeria)
Yoann Quesnel, GFZ (Germany)
Vincent Lesur, GFZ (Germany)
Mioara Mandea, GFZ (Germany)
Erwan Thébault, IPGP (France)
Fayçal Ramdani, Physics of the Earth laboratory (Morocco)
NacerEddine Bournas, Geotech Ltd (Canada)
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In the early 70's, regional airborne magnetic surveys were flown over the Algerian and Moroccan territories. The aim of these surveys was the collection of data for oil and mineral exploration. The data sets consist of more than 20 blocks the extents of which range from few hundreds to thousands km. The surveys were flown with different specifications, resulting in heterogeneous data quality and resolution. A major problem encountered when reprocessing the data is linked with the unavailability of archived data. Furthermore, the available data do not contain detailed information how they were processed.
The consistency and the resolution of the magnetic anomalies are therefore difficult to assess. In the present work, we present the results of processing techniques described in Hamoudi et al. (Geochem. Geophys. Geosyst., 8, Q06023, doi:10.1029/2007GC001638, 2007) and applied to these datasets. The new anomaly map is obtained by reprocessing and stitching together all the panels. The resulting regional anomaly map is in good agreement with the general WDMAM and with other maps established for adjacent areas. This new compilation represents a significant effort in improving the WDMAM, as it fills some of the existing gaps and enhances the resolution of the global anomaly map particularly for the North African region.
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