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Asian Journal of Earth Sciences
  Year: 2014 | Volume: 7 | Issue: 2 | Page No.: 27-39
DOI: 10.3923/ajes.2014.27.39
 
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Depositional Evolution and Sediment Facies Pattern of the Tertiary Basin in Southern Zagros, South Iran

Payman Rezaee and Sajjad Abbas Ali Nejad

Abstract:
Succession of tertiary strata in the Hormozgan province of southern Iran consists of predominantly carbonate deposits and characterized by marked changes in facies and thickness. These changes relate to sediment deposition in a foreland basin along the NE margin of the Arabian plate. In this study, stratigraphic evolution, microfacies are used to constrain the depositional evolution of the Tertiary sediments. The succession was measured at four outcrop and wells sections in the East Khamir, West Khamir, Namak and West Namak anticlines. The age of the base of the succession is Paleocene and its upper part is probably late Oligocene. The lower of the succession consists of interbedded wackestone to packstones of the Pabdeh formation. These strata are overlain by up to intrashelf deposit altered packston to grainstone (Jahrum formation) that may represent much of late Paleocene-Eocene time. The upper part of the Jahrum formation overlain by carbonate platform deposit (Asmari and Razak formations). We argue that the lithofacies and sediment- accumulation history of this succession based on these regional profiles, the tertiary depositional history of the Bandar Abbas area was reconstructed and can be divided into two tectono-sedimentary phases suggesting a transition from an active to a passive margin. The active phase (late Paleocene) dominated by pelagic marls, gravity flow deposits and lateral thickness variations. During passive phase dominated by Shallow-water facies consist mainly of packstones to grainstone with abundant benthic foraminifera. Rapid variations in thickness, Sequence stratigraphy and facies document the evolution of depositional processes in the foreland basin. In the study area, the foreland basin is characterized by a considerable SW to NE increase in stratigraphic thickness.
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How to cite this article:

Payman Rezaee and Sajjad Abbas Ali Nejad, 2014. Depositional Evolution and Sediment Facies Pattern of the Tertiary Basin in Southern Zagros, South Iran. Asian Journal of Earth Sciences, 7: 27-39.

DOI: 10.3923/ajes.2014.27.39

URL: https://scialert.net/abstract/?doi=ajes.2014.27.39

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