1887
Advances in Electromagnetic, Gravity and Magnetic Methods for Exploration
  • E-ISSN: 1365-2478

Abstract

ABSTRACT

Gravity data were used to investigate subsurface geology in the Ariana region from the Diapir Zone in Tunisia. Our study area is located in the north‐eastern part of the Maghrebides affected by the Alpine orogeny. Despite the smooth topography and the low density of the Quaternary series, integrated geological data and gravity responses (Bouguer anomaly and derivative mapping) help decipher the geological heterogeneities beneath the Quaternary overburden. The interpretation of the gravity data points to alignments of positive anomalies delineating two major orthogonal features that are thought to characterize the subsurface deep structures: 1) a lineament striking north‐west at the emplacement of an actual horst bordered by a buried fault‐system directed N140 and 2) a second counterpart striking north‐east, and is clearly expressed in the surface outcrops. These principal structural features were described as the result of a regional tectonic, compressive phase dating the Miocene. This phase was marked by reactivation and oblique‐slip displacements of regional faults; some of which (N070) are reverse and south‐east vergent. Further faulting enhanced the ascension of Triassic evaporites in diapir structures. This tectonic evolution may be integrated in the regional tectonic scheme of Alpine orogeny induced by a collision between African and European plates.

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2011-09-22
2024-04-19
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References

  1. AlouaniR., RaisJ., SahiroG. and TligS.1992. Les structures en décrochement au Jurassique de la Tunisie du Nord: Témoins d’une marge transformante entre Afrique et Europe. Les Comptes rendus de l’Academie des Sciences315, 717–724 (in French).
    [Google Scholar]
  2. AmiriA., ChaquiA., HamdiNasr, I., Inoubli, M.H., Ben AyedN. and TligS.2011. Role of preexisting faults in the geodynamic evolution of Northern Tunisia, insights from gravity data from the Medjerda valley. Tectonophysics. doi:10.1016/j.tecto.2011.03.004
    [Google Scholar]
  3. ArfaouiM., InoubliM.H., TligS. and AlouaniR.2011. Gravity analysis of salt structures. An example from the El Kef‐Ouargha region (northern Tunisia). Geophysical Prospecting59, 576–591.
    [Google Scholar]
  4. Asfirane HaddadjF. and GaldeanoA.2000. Localization of the magnetic source using Euler deconvolution and analytic signal. Bulletin de la Société Geologique de France171, 71–81.
    [Google Scholar]
  5. Ben AyedN.1986. Evolution tectonique de l’avant‐pays de la chaîne alpine de Tunisie du début du Mésozoïque à l’Actuel . PhD thesis, Université de Paris Sud, Centre d’Orsay (in French).
  6. Ben AyedN.1994. Les décrochements chevauchements E‐W et N‐S convergents de la Tunisie septentrionale : Géométrie et essai de reconstitution des conditions de déformations. Proceedings of the 4th Tunisian Petroleum Exploration Conference , Tunis , Tunisia , Expanded Abstracts, 25–38 (in French).
  7. Ben Haj AliM., ChihiL. and RabhiM.1998. Le neogene de la Tunisie. Analyse comparative des séries stratigraphiques et rôle de la tectonique et de l’halocinèse dans la genèse des bassins. Proceedings of the 6th Tunisian Petroleum Exploration Conference , Expanded Abstracts (in French).
  8. BlakelyR. and SimpsonR.1986. Approximating edges of source bodies from magnetic or gravity anomalies. Geophysics51, 1494–1498.
    [Google Scholar]
  9. BouazizS., BarrierE., SoussiM., TurkiM.M. and ZouariH.2002. Tectonic evolution of the northern African margin in Tunisia from the paleostress data and sedimentary record. Tectonophysics357, 227–253.
    [Google Scholar]
  10. Boukadi 1996. Schéma structural nouveau pour le Nord de la Tunisie. Proceedings of the 5th Tunisian Petroleum Exploration Conference , Tunis , Tunisia , Expanded Abstracts, 91–96 (in French).
  11. BournasN., GaldeanoA., HamoudiM. and BakerH.2003. Interpretation of the aeromagnetic map of Eastern Hoggar (Algeria) using the Euler deconvolution, analytic signal and local wavenumber methods. Journal of African Earth Sciences37, 191–205.
    [Google Scholar]
  12. BoussigaH.2008. Géophysique appliquée aux séries paléocènes du Sahel de Tunisie; Tectonique de socle, halocinèse et implications pétrolières . PhD thesis, Faculté des Sciences de Tunis (in French).
  13. BoutibL., MelkiF. and ZargouniF.2000. Tectonique synsédimentaire d’âge crétacé supérieur en Tunisie nord orientale; Blocs basculés et réorganisation des aires de subsidence. Bulletin de la Société Géologique de France171, 431–440 (in French).
    [Google Scholar]
  14. BracèneR. and Frizon de LamotteD.2002. The origin of interplate deformation in the Atlas system of western and central Algeria: From Jurassic rifting to Cenozoic‐Quaternary inversion. Tectonophysics357, 207–226.
    [Google Scholar]
  15. BriggsI.1974. Machine contouring ‘using minimum curvature’. Geophysics39, 39–48 (in French).
    [Google Scholar]
  16. CaireA.1970. Tectonique de la Méditerranée centrale. Extrait des annales de la Société Géologique du Nord . Tome , XC , Fascicule n°4 (in French).
    [Google Scholar]
  17. CastanyG.1956. Essai de synthèse géologique du territoire Tunisie‐Sicile. Annales des mines de la géologie6 (in French).
    [Google Scholar]
  18. ChihiL.1995. Les fossés néogènes à quaternaires de la Tunisie et de la Mer pélagienne: Etude structurale et signification dans le cadre géodynamique de la Méditerranée centrale . PhD thesis, Université Tunis II (in French).
  19. ChikhaouiM.2004. Contrôle de la sédimentation du néogène dans la zone des diapirs de la Tunisie septentrionale. Les Comptes rendus de l’Academie des Sciences336, 1131–1136 (in French).
    [Google Scholar]
  20. CordellL.1979. Gravimetric expression of graben faulting in Santa Fe Country and the Espanola Basin, New Mexico. In: New Mexico Geological Society Guidebook, 30th Field Conference , pp. 59–64.
  21. CordellL. and GrauchV.J.S.1985. Mapping basement magnetization zones from aeromagnetic data in the San Juan Basin, New Mexico. In: The Utility of the Regional Gravity and Magnetic Anomaly Maps (ed. W.J.Hinze ), pp. 181–197. SEG.
    [Google Scholar]
  22. DevolvéJ.J., MartinG. and MenantG.1981. Le Djebel Amar de l’Ariana: Esquisse structurale issue de données stratigraphiques nouvelles. Notes Service Géologique de Tunisie46 (in French).
    [Google Scholar]
  23. DeweyJ.F., HelmanM.L., TurcoE., HuttonD. and KnottS.D.1989. Kenematic of the weastern Mediterranian. In: Alpine Tectonic (eds M.Coward , D.Dietrich and R.Park ), pp. 265–283. Geological Society of London.
    [Google Scholar]
  24. DlalaM.1995. Evolution géodynamique et tectonique superposée en Tunisie. Implication sur la tectonique récente et la sismicité . PhD thesis, Université Tunis II (in French).
  25. FitzGeraldD., ReidA.B. and McInerneyP.2004. New discrimination techniques for Euler deconvolution. Computers & Geosciences30, 461–469.
    [Google Scholar]
  26. Frizon de LamotteD., Saint BezarB., BracèneR. and MercierE.2000. The two main steps of the atlas building and geodynamics of the west Mediterranean. Tectonics19, 740–761.
    [Google Scholar]
  27. GrauchV.J.S. and CordellL.1987. Limitations of determining density or magnetic boundaries from the horizontal gradient of gravity or pseudogravity data. Geophysics52, 118–121.
    [Google Scholar]
  28. GuiraudR., BosworthW., ThierryJ. and DelplanqueA.2005. Phanerozoic geological evolution of Northern and Central Africa. An overview. Journal of African Earth Sciences43, 83–143.
    [Google Scholar]
  29. HamdiI., InoubliM.H., Ben SalemA., TligS. and MansouriA.2009. Gravity contributions to the understanding of salt tectonics from the Jebel Cheid area (dome zone, Northern Tunisia). Geophysical Prospecting57, 719–728.
    [Google Scholar]
  30. InoubliM.H., BenDrissW., AmiriA., SchandoulS., Ben SalemA., ChaquiA. et al . 2010. Effective use of non‐seismic methods, Insight to renew the promotion of hydrocarbon exploration. Exploration and Production Conference of ETAP, 12–16 October 2010, Tunis , Expanded Abstracts.
  31. Jacobson 1987. A case for upward continuation as a standard separation filter for potential field maps. Geophysics52, 1138–1148.
    [Google Scholar]
  32. KacemJ.2004. Etude sismotectonique et évaluation de l’Aléa sismique régional du Nord‐Est de la Tunisie: Apport de la sismique réflexion dans l’identification des sources sismogeniques . PhD thesis, Université Tunis II (in French).
  33. KeatingP.B.1998. Weighted Euler deconvolution of gravity data. Geophysics63, 1595–1603
    [Google Scholar]
  34. McGrathP.H.1990. Dip and depth extent of density boundaries using horizontal derivatives of upward‐continued gravity data. Geophysics56, 1533–1542.
    [Google Scholar]
  35. ONM
    ONM2001. Campagne gravimétrique CG4. Coupures 1/50 000 de Ariana, Tunis, Marsa et Gamaret.
  36. PerthuisotV.1978. Dynamique et pétrogenèse des extrusions triasiques en Tunisie septentrionale . Thèse d’État, École normale supérieure, Paris (in French).
  37. PhillipsJ.D.1998. Processing and interpretation of aeromagnetic data for the Santa Cruz Basin Patahonia Mountains Area, south‐central Arizona. US Geological Survey, Open‐File Report 02–98.
  38. PiniS.1971. Notice explicative de la feuille Ariana au 1/50 000 n°13, édit. Serv. Géol. Tunisie.
  39. ReidA.B., AllsopJ.M., GranserH., MillettA.J. and SomertonI.W.1990. Magnetic interpretation in three dimensions using Euler deconvolution. Geophysics55, 80–91.
    [Google Scholar]
  40. RichardP.D., NaylorM.A. and KoopmanA.1995. Experimental models of strike‐slip tectonics. Petroleum Geoscience1, 71–80. doi:10.1144/petgeo.1.1.71
    [Google Scholar]
  41. RichertJ.P.1981. Etude structurale sur la bordure occidentale du Golf de Tunis (Tunisie) Rapport interdit de SEREPT (Elf aquitaine) (in French).
  42. RoestW.R., VerhoefJ. and PilkingtonM.1992. Magnetic interpretation using the 3‐D analytic signal. Geophysics57, 116–125.
    [Google Scholar]
  43. Sarsar NaoualiB., Hamdi NaserI., AmiriA., ChaquiA. and InoubliM.H.2010. Gravity data as a tool for delineating subsurface geology of Ariana region (Diapir zone, Tunisia). EGM 2010 International Workshop: Adding New Value to Electromagnetic, Gravity and Magnetic Methods for Exploration, Expanded Abstracts.
  44. SchoefflerJ.1975. Gravimétrie appliquée aux recherches structurales et à la prospection pétrolière et minière . Technip (in French).
    [Google Scholar]
  45. StampfliG.M. and BorelG.D.2002. A plate tectonic model for the Paleozoic and the Mesozoic constrained by the dynamic plate boundaries and restored synthetic oceanic isochrones. Earth and Planetary Science Letters196, 17–33.
    [Google Scholar]
  46. StavrevP. and ReidA.2007. Degrees of homogeneity of potential fields and structural indices of Euler deconvolution. Geophysics72, L1–L12.
    [Google Scholar]
  47. ThompsonD.T.1982. EULDPH: A new technique for making computer‐assisted depth estimates from magnetic data. Geophysics47, 31–37.
    [Google Scholar]
  48. TligS., Er‐RaouiL., Ben AissaL., AlouaniR. and TagortiM.A.1991. Tectogenèses alpine et atlasique : Deux évènements distincts dans l’histoire géologique de la Tunisie. Corrélation avec les évènements clés de la Méditerranée. Les Comptes rendus de l’Académie des Sciences312, 295–301 (in French).
    [Google Scholar]
  49. TruilletR. and TurkiM.M.1980. La tectonique tangentielle dans la zone des diapirs. L’exemple de Dj. Amar de l’Ariana (Tunisie septentrionale). Les Comptes rendus de l’Académie des Sciences291, 325–327 (in French).
    [Google Scholar]
  50. VendevilleB.C.2002. A new interpretation of Trusheim's classic model of salt‐diapir growth. Transactions – Gulf Coast Association of Geological Societies52, 943–952.
    [Google Scholar]
  51. WildiW.1983. La chaîne tello‐rifaine (Algérie, Maroc, Tunisie): Structure, stratigraphie et évolution du Trias au Miocène. Revue de Geographie Physique et de Geologie Dynamique24, 201–297 (in French).
    [Google Scholar]
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