Facies Distribution and Geometry of El Gueria Formation in Concession 137N: Preliminary Results of a Field Analog Study from Kesra Plateau

Conférence Chapitre d'actes Facies Distribution and Geometry of El Gueria Formation in Concession 137N: Preliminary Results of a Field Analog Study from Kesra Plateau eng 2003 author Jorry Stéphan 516228 author Ben-Ahmad M. author Cantaloube S. 99-105 <p>As a field analog to "B" field in Concession 137N in Tarabulus Basin, Kesra Plateau (80 km NW of Kairouan city, Tunisia) and its late Ypresian-Lutetian carbonate units have been studied in detail. These nummulitic facies also present a good field case for studying the facies distribution and geometry in a nummulitic depositional system affected by submarine palaeohighs. Two main facies tracts have been recgnized: 1) nummulitic packstone and grainstone, well developed in the western part of the plateau; and 2) skeletal-poor dolomitised wackstones and packstones with abundant nummulithoclasts well represented in the northern, southeastern and eastern parts. Between these two end members, high-energy facies with oysters and large robust nummulites passing to forebank facies with adundant discocyclinids and flat nummulties can be observed. Storm-deposited events and a high degree of bioturbation have been observed within the low-energy deposits with common nummulitic debris. A sedimentological model has been established for the nummulitic facies of Kesra Plateau showing similar facies variations as the ones in "B" field in offshore Concession 137N. Sequence stratigraphic analysis allowed correlation of nummulitic and nummulithoclastic facies, which were probably interfingered during this period. Structural activity was a major control in both areas. The main difference observed between these two models is the lack of lagoonal facies (characterised by abundant miliolids) in Kesra Plateau, whereas they are present and well represented in B field.</p> Dewey 550 Tripoli Earth Science Society of Libya 42 Département des sciences de la Terre 154 142 Département de géologie et de paléontologie 151 false The geology of northwest Libya: Ghadāmis, Jifārah, Ṭarābus and Ṣabrātah Basins Second Symposium on the Sedimentary Basins of Libya 7516f284-f6c2-422e-8f98-83da38beee17 Proceedings chapter (Published version) Public Jorry_TGNL_2003105.pdf 3901686 application/pdf openAccess Faculté des sciences / Section des sciences de la Terre et de l'Environnement / Département des sciences de la Terre Faculté des sciences / Section des sciences de la Terre et de l'Environnement / Département de géologie et de paléontologie

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Facies Distribution and Geometry of El Gueria Formation in Concession 137N: Preliminary Results of a Field Analog Study from Kesra Plateau	The geology of northwest Libya: Ghadāmis, Jifārah, Ṭarābus and Ṣabrātah Basins			2003	129	94

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Jorry, Stéphan