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Preliminary results from the first geomagnetic deep sounding in the Western sector of the Anti Atlas region, Southern Morocco
Author(s)
Type
Conference paper
Language
English
Obiettivo Specifico
1.6. Osservazioni di geomagnetismo
2.6. TTC - Laboratorio di gravimetria, magnetismo ed elettromagnetismo in aree attive
3.4. Geomagnetismo
Editor(s)
Status
Published
Issued date
2009
Conference Location
Hosted by the U.S. Geological Survey’s (USGS) Geomagnetism Program, the workshop’s measurement session was held at the Boulder Observatory and the scientific session was held on the campus of the Colorado School of Mines in Golden, Colorado
Abstract
An array of vector magnetometers was temporarily installed in the Western sector of the Anti Atlas chain, Morocco in the frame of the Geomagnetic Depth Sounding (GDS) technique. As a fruitful collaboration between Italy and Morocco, the joint project “Terremagnet”, funded by the Italian Ministry of the Foreign Affair, was aimed to local observations of the Earth’s magnetic field in order to define electric conductivity horizontal and vertical contrasts in a tectonic active region. The analysis in time and frequency-domain for tests on the induced EM field dimension, computations of single site and coupled site Transfer Functions (TFs) and induction vectors configuration are shown. Recorded data are compared to Averroes geomagnetic observatory (Morocco) (IAGA code: AVE, lat. 33° 17’ 53” N, long. 7° 24’ 48” W, altitude: 230 m a.s.l.). The preliminary results from Morocco are really encouraging and pointed out good data samplings that will allow shedding up light on the tectonic setting of this peculiar region of the Anti-Atlas.
References
Burkhard, M., S. Caritg, U. Helg, C. Robert-Charrue and A. Soulaimani. 2006. Tectonics of the Anti-Atlas of Morocco, C.R. Geoscience, v. 338,1-2, .pp11-24
Conner, J., Hefferan, K., Admou, H., 2001, Remote Sensing Analysis of the Siroua Inlier, Anti-Atlas Mountains, Morocco, AGU Spring Meeting, Boston, EOS Transactions v. 82, p. S109.
Egbert G. D. 2002. Processing and interpretation of induction array data. Survey in Geophysics, 23:207-249
Encyclopedia of Geomagnetism and Paleomagnetism, 2007, Gubbins, David; Herrero-Bervera, Emilio (Eds.), 1054 pp., ISBN: 978-1-4020-3992-8, Springer editor.
Gough, D.I., 1989. Magnetometer array studies, Earth Structure and tectonic processes. Review of Geophysics, 27: 141–157.
Lilley,F.E.and B.R.Arora, 1982.The sign convention for quadrature Parkinson arrows in Geomagnetic induction Studies, Rev. Geophys. Space Phys., 20,513–518.
Makris, J., Demnati, A., Klussman, J., 1985. Deep seismic soundings in Morocco and a crust and upper mantle model deduced from seismic and gravity data. Ann. Geophys. 3 (3)., 369–380.
Menvielle, M., Rossignol, J.-C.1982. Conséquences tectoniques de l’existence d’une anomalie de conductivité au Nord du Maroc. Can. Journ. Of Earth Sc., vol. 19.
Michard A. 1976. Eléments de géologie marocaine. Notes et Mémoires Service Géologique du Maroc, Rabat 252: 408.
Parkinson, W. D., 1989. The analysis of single site induction data, Phys. Earth Planet.Inter.,53,360–364.
Ramdani F., 1998. Geodynamic implications of intermediate-depth earthquakes amd volcanism in the interpolate Atlas mountains (Morocco), Phys. Earth Plan. Int., vol. 108, pp. 245-260.
Schmucker U., 1970. Anomalies of geomagnetic variations in the southwestern United States. Bull. Scripts Inst. Oceanogr., Univ. Calif, 13, 165.
Schwarz, G., H. G. Mehl, F. Ramdani and V. Rath. 1992. Electrical resistivity structure of the eastern Moroccan Atlas System and its Tectonic implications. International Journal of Earth Sciences , vol. 81,1.
Stets, J. & Wurster, P. 1982. Atlas and Atlantic structural relations. In Geology of the Northwest African continental margin (eds Von Rad, U., Hinz, K., Sarntheim, M. & Seibold, E.), pp. 69–85 (Springer-Verlag, New York).
Conner, J., Hefferan, K., Admou, H., 2001, Remote Sensing Analysis of the Siroua Inlier, Anti-Atlas Mountains, Morocco, AGU Spring Meeting, Boston, EOS Transactions v. 82, p. S109.
Egbert G. D. 2002. Processing and interpretation of induction array data. Survey in Geophysics, 23:207-249
Encyclopedia of Geomagnetism and Paleomagnetism, 2007, Gubbins, David; Herrero-Bervera, Emilio (Eds.), 1054 pp., ISBN: 978-1-4020-3992-8, Springer editor.
Gough, D.I., 1989. Magnetometer array studies, Earth Structure and tectonic processes. Review of Geophysics, 27: 141–157.
Lilley,F.E.and B.R.Arora, 1982.The sign convention for quadrature Parkinson arrows in Geomagnetic induction Studies, Rev. Geophys. Space Phys., 20,513–518.
Makris, J., Demnati, A., Klussman, J., 1985. Deep seismic soundings in Morocco and a crust and upper mantle model deduced from seismic and gravity data. Ann. Geophys. 3 (3)., 369–380.
Menvielle, M., Rossignol, J.-C.1982. Conséquences tectoniques de l’existence d’une anomalie de conductivité au Nord du Maroc. Can. Journ. Of Earth Sc., vol. 19.
Michard A. 1976. Eléments de géologie marocaine. Notes et Mémoires Service Géologique du Maroc, Rabat 252: 408.
Parkinson, W. D., 1989. The analysis of single site induction data, Phys. Earth Planet.Inter.,53,360–364.
Ramdani F., 1998. Geodynamic implications of intermediate-depth earthquakes amd volcanism in the interpolate Atlas mountains (Morocco), Phys. Earth Plan. Int., vol. 108, pp. 245-260.
Schmucker U., 1970. Anomalies of geomagnetic variations in the southwestern United States. Bull. Scripts Inst. Oceanogr., Univ. Calif, 13, 165.
Schwarz, G., H. G. Mehl, F. Ramdani and V. Rath. 1992. Electrical resistivity structure of the eastern Moroccan Atlas System and its Tectonic implications. International Journal of Earth Sciences , vol. 81,1.
Stets, J. & Wurster, P. 1982. Atlas and Atlantic structural relations. In Geology of the Northwest African continental margin (eds Von Rad, U., Hinz, K., Sarntheim, M. & Seibold, E.), pp. 69–85 (Springer-Verlag, New York).
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