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Mechanical stratigraphy and folding style of the Lurestan region in the Zagros Fold–Thrust Belt, Iran
Uppsala University, Disciplinary Domain of Science and Technology, Earth Sciences, Department of Earth Sciences, Solid Earth Geology.
2009 (English)In: Journal of the Geological Society, ISSN 0016-7649, E-ISSN 2041-479X, Vol. 166, no Part 6, 1101-1115 p.Article in journal (Refereed) Published
Abstract [en]

The structural style of the folds from the central part of the Lurestan   salient located in the NW portion of the Zagros Fold-Thrust Belt has   been studied by constructing a regional balanced cross-section from   field data, existing geological maps, seismic profiles, stratigraphic   surface sections and well data. The regional balanced structural   cross-section that is constructed front the High Zagros Fault to the   Mountain Front Fault highlights the difference in the folding style   across the area. The vertical and lateral changes in the style of the   folding indicate the influence of mechano-stratigraphic contrast   between the sedimentary units. Three main decollement levels (the basal   Lower Palaeozoic, the intermediate Triassie, and the upper Upper   Cretaceous-Lower Palaeocene) have been interpreted. Folds developed   during the Zagros Fold-Thrust Belt evolution above and below these   decollement horizons are decoupled from each other and are different in   both geometry and size. Similarly, thickness and facies changes of some   formations across the region cause lateral variation in folding pattern   from the north to the south. Polyharmonic folds exist in the South,   where the different structural levels are relatively strongly coupled.   To the north, however, strongly disharmonic folding occurs where a   combination of increased decollement thickness and decreased mechanical   competence has led to decoupling at different structural levels. This   change in folding style has a direct impact on hydrocarbon exploration   in the area. To reduce structural risk in exploration, the   incorporation of high-resolution deep seismic data with the surface   geology is recommended for future hydrocarbon exploration activities   within the Lurestan region.

Place, publisher, year, edition, pages
2009. Vol. 166, no Part 6, 1101-1115 p.
National Category
Earth and Related Environmental Sciences
Research subject
Earth Science with specialization in Mineral Chemistry, Petrology and Tectonics
URN: urn:nbn:se:uu:diva-119369DOI: 10.1144/0016-76492008-162ISI: 000271845500010OAI: oai:DiVA.org:uu-119369DiVA: diva2:300170
Available from: 2010-02-25 Created: 2010-02-25 Last updated: 2011-11-28Bibliographically approved

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Koyi, H.A.
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