The Asmari Formation Revisited: Changed Stratigraphic Allocation and New Biozonation

Laursen, Gitte V.; Monibi, S.; Allan, Tony; Pickard, Neil A. H.; Hosseiney, A.; Vincent, Benoı̂t; Hamon, Y.; Buchem, F. S. P.; Moallemi, Ali; Druillion, G.

doi:10.3997/2214-4609.20145919

Cited by 72 publications

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“…Assemblage (Wynd, 1965;Adams and Bourgeois, 1967;Laursen et al, 2009;Van Buchem et al, 2010) and comparisons with the global Oligocene/Miocene zonation of Cahuzac and Poignant (1997) (Tables 1, 2 and 3).…”

Section: N0mentioning

confidence: 99%

“…This biozonation is used by many recent authors (e.g., Allahkarampour Dill et al, 2010;Van Buchem et al, 2010;Sooltanian et al, 2011;Rahmani et al, 2012). The biozonation scheme of Laursen et al (2009) and Van Buchem et al (2010) have some basic differences compared to the old scheme (Adams and Bourgeois, 1967). In the old scheme, the noticeable thickness of the Asmari limestone, containing Archaias, has been considered Aquitanian.…”

Section: Introductionmentioning

confidence: 99%

“…Also in the biozonation of Laursen et al (2009) andVan Buchem et al (2010), the Oligocene sediments are divided to Rupelian and Chattian. The area of the new biostratigraphic studies which used the biozonation of Laursen et al (2009) and Van Buchem et al (2010) is very small in comparison to the total area of the Asmari basin (more than 150 km × 700 km). There are a lot of areas with unpublished sections for which the new biozonation should be considered.…”

Section: Introductionmentioning

confidence: 99%

“…The data obtained from biostratigraphic studies in this area will be used for the future regional study. The abundance of large benthic foraminifera in the limestones of the Asmari Formation offers an excellent opportunity to study paleoenvironmental controls on larger benthic foraminiferal assemblages in The objectives of this study are (1) to reconstruct a coherent biostratigraphic framework for the carbonate deposits of the Asmari Formation in the studied area based on available biozonation schemes (Cahuzac and Poignant, 1997;Laursen et al, 2009;Van Buchem et al, 2010) (Tables 1 and 2), and (2) to present the paleoenvironmental factors which affect the distribution of biogenic components of the Asmari Formation.…”

Section: Introductionmentioning

confidence: 99%

“…These two reports were used by many authors (e.g., Seyrafian, 2000;Vaziri-Moghaddam et al, 2006;Amirshahkarami et al, 2007a, b). Recently, Ehrenberg et al (2007), Laursen et al (2009) and Van Buchem et al (2010) conducted strontium isotope dating to improve the biostratigraphic ages for the Asmari Formation across most parts of the Zagros basin (Izeh zone and Dezful Embayment) ( Table 2). This biozonation is used by many recent authors (e.g., Allahkarampour Dill et al, 2010;Van Buchem et al, 2010;Sooltanian et al, 2011;Rahmani et al, 2012).…”

Section: Introductionmentioning

confidence: 99%

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Biostratigraphy and paleoecology of the Oligo-Miocene Asmari Formation in the Izeh zone (Zagros Basin, SW Iran)

Taheri

Vaziri-Mogaddam

Taheri

et al. 2017

BSGM

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RESUMEN ABSTRACTIn this study, biostratigraphy and paleoecology of the Asmari Formation have been investigated. The study area is located in the Izeh zone, Zagros Basin. Four outcrop sections (Halayjan, Kuh Shur, Kuh-e Bad and Gharibi Ha) have been sampled. Based on distribution of the larger benthic and planktonic foraminifera, five assemblage zones have been recognized. Assemblages 1 and 2 indicate Chattian; assemblage 3 is restricted to Aquitanian and assemblages 4 and 5 suggest Burdigalian. During the Chattian, the carbonate deposits of the Asmari Formation are mostly composed of coralline red algae and large and flat benthic foraminifera. The common components of the Aquitanian are abundant imperforate foraminifera and Favreina asmaricus. The Burdigalian is characterized by coral, coralline algae, and perforate and imperforate foraminifera. During the Burdigalian toward the SE of study area (Gharibi Ha section), the shallow water deposits are abruptly overlain by pelagic limestone. It is interpreted as the result of a regional tilting that started in the upper part of the Burdigalian. The biotic associations suggest that carbonate sedimentation occurred in tropical to subtropical waters under oligotrophic to mesotrophic conditions. The carbonate grain associations in the Asmari Formation suggest heterozoan association. According to paleoecological parameters (such as: nutrient, depth, light and salinity) in the study area, the Asmari Formation belongs to nannofor-foralgal to foramol association which were deposited in slightly hyper to normal saline environment. In the euphotic zone, abundant imperforate foraminifera are present. Basinward, lens shaped rotalids developed in mesophotic conditions, and large lepidocyclinid-nummulitids characterize the sediments of the deeper oligophotic zone.Keywords: Asmari Formation, Oligocene-Miocene, biostratigraphy, paleoecology, larger benthic foraminifera, Zagros Basin.

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Section: N0mentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Biostratigraphy and paleoecology of the Oligo-Miocene Asmari Formation in the Izeh zone (Zagros Basin, SW Iran)

Taheri

Vaziri-Mogaddam

Taheri

et al. 2017

BSGM

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The Oligocene to Lower Miocene depositional sequences of the Zagros Basin, SW Iran

et al. 2021

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This research assesses the Oligocene to Lower Miocene Asmari and Pabdeh formations characteristics and depositional sequences in the Zagros Basin (south-west Iran).A regional stratigraphic transect is selected including the Persian Gulf Foreland Basin, Dezful Embayment, and the Zagros Simple Folded sub-zones of the Zagros Basin. Five major depositional sequences have been distinguished by major changes in facies and stratal architecture. The spatial and temporal distribution and evolution of the five third-order sequences identified show a strong progradation system from the Zagros Simple Folded Belt (N/NE) towards the Persian Gulf Foreland Basin, especially during the Rupelian, while geometric intricacy and significant facies changes are less developed in the Late Chattian and Early Miocene. According to the sequence stratigraphy correlation, two tectonic pulses are proposed for the Asmari deposits in the Dezful Embayment and Zagros Simple Folded Belt during the Rupelian to Early Chattian. During the Burdigalian, the series drastically thickens northward, so that the greatest sediment thickness occurred in the Zagros Simple Folded Belt. There is probably a connection between the structural closure of the Neo-Tethys and the continuous uplift of the Zagros fold belt in the study area.

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Biostratigraphy and Microfacies of Azkand Formation in Qarah Chaugh- Dagh Section, Kirkuk Area (Northeastern Iraq)

Ghafor

2022

Advances in Science, Technology &Amp; Innovation

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The Asmari Formation Revisited: Changed Stratigraphic Allocation and New Biozonation

Cited by 72 publications

References 0 publications

Biostratigraphy and paleoecology of the Oligo-Miocene Asmari Formation in the Izeh zone (Zagros Basin, SW Iran)

Biostratigraphy and paleoecology of the Oligo-Miocene Asmari Formation in the Izeh zone (Zagros Basin, SW Iran)

The Oligocene to Lower Miocene depositional sequences of the Zagros Basin, SW Iran

Biostratigraphy and Microfacies of Azkand Formation in Qarah Chaugh- Dagh Section, Kirkuk Area (Northeastern Iraq)

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