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Magnetic mapping of geologic contacts in the Taourirt–Oujda corridor–Horst belt (northeastern Morocco)

العنوان: المسح المغناطيسي للتراكيب الخطية الجيولوجية لِممر تاوريرت ـ وجدة وجبال الهورست (شمال شرق المغرب)

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Abstract

From a geologist's perspective, magnetic data are most useful in mapping contacts and providing insight into the 3D geometry of the geology. Since the early 1970s, automatic methods based on the horizontal and vertical derivatives are applied to potential field data in order to map geological lineaments. In this paper, three methods for locating magnetic contacts are applied to magnetic anomaly data of the study area. The local maxima of horizontal gradient determined on the magnetic map and its upward continued maps to several heights delineate the contacts and indicate their dips. The amplitude of the 3D analytic signal of magnetic data provides information on the location of the edge of the sources in both the horizontal and vertical dimensions. The Euler deconvolution is also used to estimate the source depth at the contact location. These results allow the production of a structural map showing the magnetic lineaments for the survey area. This map is consistent with many faults already recognised or supposed by the traditional structural studies and highlights new ones by specifying their layout and dips.

ملخص

تعتبر المعطيات المغناطيسية وسيلة هامّة في الحصول على منظور ثلاثي الأبعاد للبنية الجيولوجية و مسح حدودها. فمنذ أوائل السبعينيات، يتِم تطبيق تقنيات أوتوماتيكية ترتكز على المشتقات الأفقية و العمودية للشّدة المغناطيسية من أجل إنتاج خرائط التراكيب الخطية الجيولوجية التحت السطحية. تتمحور هذه الدراسة حول إعادة تفسير المعطيات المغناطيسية باستعمال تقنيات حديثة للمعالجة ( التدريج الأفقي، التمديد إلى الأعلى ،الإشارة التحليلية وطريقة أولر ) من اجل تحديد مواقع التراكيب الخطية المغناطيسية لشمال ـ شرق المغرب. مكّنت المكسيما المحلِّية للتدريج الأفقي المحددة على الخريطة المغناطيسية المحوَلة إلى القطب و على الخرائط الممددة إلى الأعلى (إلى عِدة مستويات) مِن تحديد التراكيب الخطية وإتجاه مَيلانها. كما تمّت الإستعانة بخصائص الإشارة التحليلية في الأبعاد الثلاثة و بطريقة أولر لتحديد مكان وعمق الأجسام المغناطيسية. نتيجةً لهذه الدراسات تمّ التوصل إلى خريطة بنيوية تظهر مختلف التركيبات الخطية المغناطيسية.هذه النتائج أكدت من جهة الدراسات البنيوية السابقة للفوالق المؤكدة و المحتملة كما أبرزت من جهة أخرى تراكيب خطية جديدة مع تحديد مكانها،عمقها و مَيلانها.

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References

  • Ait Brahim L, Chotin P, Hinaj S, Abdelouafi A, El Adraoui A, Nakcha C, Dhont D, Charroud M, Sossey Alaoui F, Amrhar M, Bouaza A, Tabyaoui H, Chaouni A (2002) Paleostress evolution in the Moroccan African margin from Triassic to Present. Tectonophysics 357:187–205

    Article  Google Scholar 

  • Archibald N, Gow P, Bochetti F (1999) Multiscale edge analysis of potential field data. Explor Geophys 30:38–44

    Article  Google Scholar 

  • Blakely RJ, Simpson RW (1986) Approximating edges of source bodies from magnetic or gravity anomalies. Geophysics 51(7):1494–1498, 5 Figs

    Article  Google Scholar 

  • Cattaneo G, Gélard JP (1989) Le fonctionnement de la marge africaine de la Téthyse maghrébine au Jurassique supérieur-Crétacé basal: son enregistrement dans les systèmes sédimentaires de l’Avant pays rifain oriental. C R Acad Sci Paris 309(Série II):109–114

    Google Scholar 

  • Chennouf T, Khattach D, Milhi A, Andrieux P, Keating P (2007) Principales lignes structurales du Maroc nord-oriental: Apport de la gravimétrie. Comptes Rendues. Geoscience 339:383–395

    Article  Google Scholar 

  • Chotin P, Ait Brahim L, Tabyaoui H (2000) The southern Tethyan margin in north-eastern Morocco, sedimentary characteristics and tectonic control. Peri-Tethys Mémoire 5. Mémoires du Muséum National de l’histoire Naturelle, Paris, 182, 107–128

  • El Hammichi F, Tabyaoui H, Chaouni A, Ait Brahim L, Chotin P (2006) Mio-Pliocène tectonics in Moroccan Rifian Forland: coexistence of compressive and extensional structures. Rev Soc Geol Esp 19(1–2):2006

    Google Scholar 

  • Hervouet Y (1986) Evolution tectonique de l’avant pays rifain oriental (orogène alpine, Maroc). Rev Géogr Phys Géol Dynam 27(1):25–35

    Google Scholar 

  • Hoepffner Ch (1987) La tectonique hercynienne dans l’Est du Maroc. Unpublished thesis, University of Strasbourg 1, pp 280

  • Houari MR (1987) Etude géologique de la Boutonnière paléozoïque des Zekkara (Maroc oriental); sa place dans le contexte de la chaîne hercynienne. Thèse de 3ème cycle. Ecole Normale Supérieure Souissi. Rabat, pp 163

  • Khattach D, Keating P, Mili EM, Chennouf T, Andrieux P, Milhi A (2004) Apport de la gravimétrie à l'étude de la structure du bassin des Triffa (Maroc Nord-oriental): implications hydrogéologiques. C R Geosci 336:1427–1432

    Article  Google Scholar 

  • Khattach D, Mraoui H, Sbibih D, Chennouf T (2006) Analyse multi-échelle par ondelettes des contacts géologiques: application à la carte gravimétrique du Maroc nord-oriental. C R Geosci 338:521–526

    Article  Google Scholar 

  • Laville E, Piqué A (1991) La distension crustale atlantique et atlasique au Maroc au debut du Mésozoïque: le rejeu des structures hercyniennes. Bull Soc Géol Fr 162:1161–1171

    Google Scholar 

  • MacLeod IN, Jones K, Dai TF (1993) 3-D analytic signal in the interpretation of total magnetic field data at low magnetic latitudes. In: Proceedings of the Third International Congress of Brazilian Society of Geophysicists

  • Michard A (1976) Eléments de géologie marocaine. Notes Mém Serv Géol 252:408

    Google Scholar 

  • Mrini Z, Rafi A, Duthou JL, Vidal Ph (1992) Chronologie Rb/Sr des granitoïdes hercyniens du Maroc, conséquences. Bull Soc Géol Fr 163:281–291

    Google Scholar 

  • Nabighian MN (1972) The analytic signal of two-dimensional magnetic bodies with polygonal cross-section: its properties and use for automated anomaly interpretation. Geophysics 37:507–517

    Article  Google Scholar 

  • Pinet N, Lavoie D, Keating P, Brouillette P (2008) Gaspé belt subsurface geometry in the northern Québec Appalachians as revealed by an integrated geophysical and geological study: 1—Potential field mapping. Tectonophysics 460:34–54

    Article  Google Scholar 

  • Reid AB, Allsop JM, Granser H, Millett AJ, Somerton IW (1990) Magnetic interpretation in three dimensions using Euler deconvolution. Geophysics 55:80–90

    Article  Google Scholar 

  • Roest WR, Verhoef J, Pilkington M (1992) Magnetic interpretation using the 3D analytic signal. Geophysics 57:116–125

    Article  Google Scholar 

  • Sibson R (1981) A brief description of natural neighbor interpolation. In: Barnett V (ed) Interpreting multivariate data. Wiley, New York, pp 21–36

    Google Scholar 

  • Tabyaoui H, Ait Brahim L, Tahiri A, Chotin P (2000) Evolution tectono-sédimentaire du N-E du Maroc au cours du Trias supérieur: Apport des données microtectoniques. Revue de la Géologie Méditerranéenne Marseille XXVI(3–4):231–243

    Google Scholar 

  • Thompson DT (1982) EULDEPH—a new technique for making computer-assisted depth from magnetic data. Geophysics 47:31–37

    Article  Google Scholar 

  • Tisserant D, Laouina A, Clauer P (1985) Datation Kar des basaltes de la plaine d’Angad. Sci Géol Bull 38:2

    Google Scholar 

  • Torbi A, Gélard JP (2000) Paléocontraintes identifiées dans la couverture méso-cénozoïque du Maroc nord-oriental. Relations avec l’ouverture de l’Atlantique et le rapprochement Afrique–Europe. C R Acad Sci Paris 330:853–858

    Google Scholar 

  • Van Den Bosch JWD (1981) Mémoire explicatif de la carte gravimétrique du Maroc (provinces du Nord) au 1/500 000. Notes et Mémoires du Service Géologique Maroc, 234 bis, pp 219

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Acknowledgements

The authors would like to thank the anonymous reviewer for their detailed comments on the manuscript, which helped to improve this paper considerably.

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Authors and Affiliations

  1. Laboratoire des Géosciences Appliquées & Centre de l’Oriental des Sciences et Technologies de l’Eau (COSTE), Faculté des Sciences, Université Mohammed I, B.P. 717, 60000, Oujda, Morocco

    Radia El Gout, Driss Khattach, Mohammed-Rachid Houari & Touria Chennouf

  2. Laboratoire des Géosciences Appliquées, Faculté des Sciences, Université Mohammed I, B.P. 717, 60000, Oujda, Morocco

    Radia El Gout

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  1. Radia El Gout
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  2. Driss Khattach
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  3. Mohammed-Rachid Houari
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  4. Touria Chennouf
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Correspondence to Radia El Gout.

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El Gout, R., Khattach, D., Houari, MR. et al. Magnetic mapping of geologic contacts in the Taourirt–Oujda corridor–Horst belt (northeastern Morocco). Arab J Geosci 4, 299–308 (2011). https://doi.org/10.1007/s12517-010-0163-9

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