Modelling Genesis of Intracratonic Chains Related to Tectonics Inheritance: Case Study from Gafsa Basin (Southern Central Tunisia)
2009; Canadian Center of Science and Education; Volume: 1; Issue: 2 Linguagem: Inglês
10.5539/jgg.v1n2p58
ISSN1916-9787
AutoresMohamed Sadok Bensalem, Mohamed Ghanmi, Fouad Zargouni,
Tópico(s)Geological and Geochemical Analysis
ResumoTectonic inheritance is a concept proved by the importance of tectonic phase’s variation during time. It is related toreactivation in compression of old normal faults. In our study we will focus on Gafsa basin that is an example ofintracratonic chain. The tectonic data confirm that it is affected by several tectonics phases; they began with Triassicdistension continuing to Cretaceous and followed by resumption in compression according to NW-SE direction duringalpine phase. Structural reliefs observed in Gafsa Basin are interpreted according to the “fault related fold” theory, byusing the model of ‘fault propagation fold’. The applications of this model will show a decollement level within theTriassic series. In addition, an important deformation will be identified while approaching to faults. The data elaboratefrom field confirm the role of these faults in the interpretation of tectonic heritage and development of intracratonicchains in Gafsa Basin.
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