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Basin evolution in the Lurestan region of the Zagros fold-and-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 Petroleum Geology, ISSN 0141-6421, E-ISSN 1747-5457, Vol. 32, no 1, p. 5-19Article in journal (Refereed) Published
Abstract [en]

The evolution of the central part of the Lurestan region in the Zagros fold-and-thrust belt has been studied using newly generated isopach maps for different time intervals between the Late Cretaceous and the Miocene. The study was based on existing geological maps, gravity data, measured stratigraphic surface sections, original field work and well data. Understanding the processes which have influenced facies and thickness variations in the study area will have a significant impact on future hydrocarbon exploration.

Cenomanian carbonates assigned to the Sarvak Formation, the main reservoir unit in the study area, are composed of both pelagic and neritic facies. These facies occur along the roughly north-south trending "Anaran lineament", interpreted to represent a palaeohigh, which influenced patterns of sedimentation in the Cretaceous-Tertiary. The palaeohigh formed as a result of the reactivation of a basement lineament in the Late Cretaceous. The continuing influence of this lineament on patterns of sedimentation during Oligocene - early Miocene time is indicated by a range of evidence including the presence of clinoform geometries.

Analysis of sedimentary thicknesses in the Zagros foreland basin between the Late Cretaceous and the early Miocene indicates progressive SWward migration of the depocentre. Late Cretaceous ophiolite obduction and plate margin convergence exerted a major influence on stratigraphic architecture, and controlled depocentre migration and foreland basin evolution.

Place, publisher, year, edition, pages
2009. Vol. 32, no 1, p. 5-19
Keyword [en]
Lurestan, Zagros foldbelt, Iran, Sarvak Formation, Anaran Lineament, basin evolution, depocentre migration, isopach maps, foreland basin
National Category
Earth and Related Environmental Sciences
Identifiers
URN: urn:nbn:se:uu:diva-105518DOI: 10.1111/j.1747-5457.2009.00432.xISI: 000261881800001OAI: oai:DiVA.org:uu-105518DiVA, id: diva2:221424
Available from: 2009-06-04 Created: 2009-06-04 Last updated: 2017-12-13Bibliographically approved

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