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3D Gravity Inversion of Northern Sinai Peninsula: A Case Study

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Abstract

The Sinai Peninsula has attracted the attention of many geological and geophysical studies as it is influenced and bounded by major tectonic events. Those are (1) the Mesozoic to Early Cenozoic tectonically active opening of the Tethys, (2) the Late Cretaceous to Early Tertiary (Laramide) Syrian arc system, due to closing of the Tethys (3) the Oligo-Miocene Gulf of Suez rifted basin, and (4) the Late Miocene to Recent transform Dead Sea–Gulf of Aqaba rift. Additionally, the shear zones inside Sinai such as the Ragabet El-Naam and Minsherah-Abu Kandu Shear Zones. Each of these major tectonic events has affected dramatically the structure evolution of the northern Sinai area. The present paper estimates the 3D density contrast model using the gravity data of northern Sinai. The estimated 3D density contrast model elucidated the peculiarities of the main structural elements in the region. The estimated 3D density contrast model showed the high and low gravity anomalies that form the main mountains and main valleys in northern Sinai. The estimated low density zones are in agreement with the inferred faults resulting from the first horizontal derivative. Comparing the 3D model with the tectonic history of the region and the results of the first horizontal derivative and least square separation increased the reliability of the model.

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Authors and Affiliations

  1. Centro de Geofísica da Universidade de Lisboa-IDL, Universidade de Lisboa, Campo Grande, Ed. C8, 1749-016, Lisbon, Portugal

    Mohamed A. Khalil & Fernando M. Santos

  2. The National Research Institute of Astronomy and Geophysics (NRIAG), Helwan, Cairo, Egypt

    Mohamed A. Khalil

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  1. Mohamed A. Khalil
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  2. Fernando M. Santos
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Correspondence to Mohamed A. Khalil.

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Khalil, M.A., Santos, F.M. 3D Gravity Inversion of Northern Sinai Peninsula: A Case Study. Pure Appl. Geophys. 171, 1557–1569 (2014). https://doi.org/10.1007/s00024-013-0707-5

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  • DOI: https://doi.org/10.1007/s00024-013-0707-5

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