Journal ArticleDOI
Stratigraphic Nomenclature of Iranian Oil Consortium Agreement Area
G. A. James,J. G. Wynd +1 more
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The stratigraphy and correlation of Triassic to Plio-Pleistocene sediments within the Iranian Oil Consortium Agreement Area are discussed in this paper, where rock-stratigraphic units are named and defined.Abstract:
The stratigraphy and correlation of Triassic to Plio-Pleistocene sediments within the Iranian Oil Consortium Agreement Area are discussed. Rock-stratigraphic units are named and defined. These are correlated with the Iraq, Kuwait, and Saudi Arabian stratigraphic successions. The Agreement Area, situated northeast of the Arabian shelf and including part of the Zagros orogenic area, has been the site of more or less continuous sedimentation from Triassic to Plio-Pleistocene time. Regional disconformities occur at the top of the Aptian, the Cenomanian-Turonian, the Cretaceous, and the Eocene. A major angular unconformity produced by Mio-Pliocene folding occurs at the top of the Fars Group. Carbonate and shale deposition controlled by epeirogenic movements dominated until Late Cretaceous time when movements within the Zagros area began to influence sedimentation. Upper Cretaceous, Paleocene, Eocene, and Oligocene deposits are characterized by sharp facies and thickness changes as a result of orogenic movements in the Zagros area. Following deposition of the O igocene-lower Miocene Asmari Formation the Agreement Area was part of a trough trending northwest-southeast. After initial evaporitic and marine phases, this trough was filled by clastics derived from the rising Zagros Mountains on the northeast. Conglomerates of the Bakhtyari, deposited unconformably upon the Fars Group, mark the end of this basinal filling.read more
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Journal ArticleDOI
Structural History and Tectonics of Iran: A Review
TL;DR: The structural development of the Iranian ranges has certain peculiarities which contradict the conventional geosynclinal theory of mountain building as mentioned in this paper, and the conventional tripartite division of Iran into an extensive median mass and two bordering ranges of geosyclinal origin (Zagros, Alborz) cannot be maintained.
Journal ArticleDOI
Regional stratigraphy of the Zagros fold-thrust belt of Iran and its proforeland evolution
TL;DR: The latest Neoproterozoic through Phanerozoic stratigraphy of the Zagros fold-thrust belt of Iran has been revised in the light of recent investigations.
Journal ArticleDOI
Convergence history across Zagros (Iran): constraints from collisional and earlier deformation
TL;DR: In this paper, the main Zagros orogen is shown to be deeply rooted, possibly to Moho depths, and the suture zone effectively runs along the MZT.
Journal ArticleDOI
Master “blind” thrust faults hidden under the Zagros folds: active basement tectonics and surface morphotectonics
TL;DR: In this article, the authors reveal at least four active SW-vergent segmented master blind thrusts in the Zagros collisional belt, along which different morphotectonic units are thrusting over the deforming regions.
Journal ArticleDOI
Zagros orogeny: a subduction-dominated process
Philippe Agard,Jafar Omrani,Laurent Jolivet,Hubert Whitechurch,Bruno Vrielynck,Wim Spakman,Patrick Monié,Bertrand Meyer,Rinus Wortel +8 more
TL;DR: In this paper, the authors presented a synthetic view of the geodynamic evolution of the Zagros orogen within the frame of the Arabia-Eurasia collision, and provided lithospheric-scale reconstructions of the zagros Orogen from ~ 150 to 0 Ma across two SW-NE transects.
References
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Journal ArticleDOI
Cretaceous and Tertiary reef formations and associated sediments in Middle East
TL;DR: In this article, the authors summarize provisionally various observations, from scattered outcrops and wells, on the stratigraphic relationships of some reefs in the Middle East and show that, under ideal conditions, the back-reef, reef, and forereef facies-zones of a reef-complex can be differentiated by petrographic and micropaleontologic criteria recognizable in thin sections, even of well cuttings.
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Reservoir Rocks of Persian Oil Fields
TL;DR: The Asmari Limestone is a fine-grained foraminiferal limestone, mostly of low porosity, and the porosity of the rock is independent of the degree of dolomitization.