Biostratigraphy, facies analysis of Upper Cretaceous–Lower Paleocene strata in south Zagros basin (southwestern Iran)

Afghah, Massih

doi:10.1016/j.jafrearsci.2016.04.002

Cited by 16 publications

(22 citation statements)

References 21 publications

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“…Based on three assemblage zones (Multiscissurata, Miscellanea-Kathina assemblage and Opertorbitolites range biozone), the Sachun Formation in the study area is Upper Cretaceous (Maastrichtian)-Lower Eocene (Ypersian) in age. Therefore, the lower part of Sachun Formation is synchronous with the top of the Tarbur formation (Cretaceous-Lower Paleocene) as previously determined by Payandeh et al 2018;Rashidi and Schlagintweit 2018;Afghah (2016); Afghah and Farhoudi (2012). Based on the occurrence of large and small foraminifera and calcareous algae associations, the following paleoecological implications are defined for the Sachun depositional environment in both sections in the Interior Fars of the Zagros Basin.…”

Section: Resultsmentioning

confidence: 80%

“…These environments received sediments originating from erosion of previously uplifted regions (Motiei 1995). The effect of the mentioned movement has increased the depth of the sedimentary basin and the tendency of the continental facies in the lower Paleocene to marine facies (Afghah 2016;Nafarieh et al 2019). Therefore, Sachun Formation (almost equivalent to the Kashkan Formation in Lurestan zone) can change the facade of the Pabdeh Formation in the Laramide movement following Laramide (Motiei 1995).…”

Section: Paleoenvironment and Tectono-sedimentarymentioning

confidence: 99%

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Biostratigraphy, facies analysis and sequence stratigraphy of the Sachun Formation (Interior Fars, Zagros, SW of Iran)

Karimi

Afghah

Ghetmiri

et al. 2020

Carbonates Evaporites

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Two sections of the Maastrichtian–Lower Eocene Sachun Formation, crossing Interior Fars zone, Zagros basin in SW Iran, were selected. To biostratigraphy, facies analysis, paleoenvironment and sequence stratigraphy, foraminifers and lithofacies were studied. Three foraminifer assemblage zones were observed in the studied areas. According to stratigraphic distribution of the identified foraminifers, the Sachun Formation is assigned to Upper Cretaceous (Maastrichtian)—Lower Eocene (Ypersian) age. The sedimentation of the Sachun Formation was controlled by the sea-level fluctuation. According to the sedimentary records, Sachun Formation has been deposited in a tectonically unstable basin. Microscopic investigation confirms the presence of seven microfacies, which can be grouped into four depositional environments: tidal flat, lagoon, shoal, and open marine. A carbonate shallow shelf is suggested for the depositional environment of the Sachun Formation, with the depth of sedimentary basin of the Sachun Formation decreasing from the study area to the south of Fars zone. Sachun Formation facies have been deposited in a shallow depositional basin characterized by permanent sea level changes. The vertical distribution of the investigated lithofacies supports two third-order cyclic sequences in the Sachun Formation, based on shallowing upward patterns in the determined lithofacies.

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Section: Resultsmentioning

confidence: 80%

Section: Paleoenvironment and Tectono-sedimentarymentioning

confidence: 99%

Biostratigraphy, facies analysis and sequence stratigraphy of the Sachun Formation (Interior Fars, Zagros, SW of Iran)

Karimi

Afghah

Ghetmiri

et al. 2020

Carbonates Evaporites

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“…The foraminifers were identified by utilizing the published works of several researchers (e.g., Afghah et al, 2020; Afghah & Shaabanpour Haghighi, 2014; Ghanem & Kuss, 2013; Ghanem et al, 2012; Hosseini et al, 2016; Rahiminejad & Hassani, 2016; Schroeder et al, 2010; Simmons et al, 2000; Vincent et al, 2010). Determination of microfacies, (Husinec et al, 2000; Permoli Silva & Verga, 2004) development of a depositional model followed the previous works of Afghah (2016); Mülayim et al (2016); Raspini (2012), and Upadhyay (2014). Classification of the carbonate microfacies was achieved using the schemes of Dunham (1962), Flügel (2004), and Wilson (1975).…”

Section: Methodsmentioning

confidence: 99%

“…Microfacies 3 is equivalent to the standard microfacies type 3 [(SMF‐3) of Flügel, 2004]. The presence of a wackestone–mudstone microfacies with pelagic foraminifers indicates a low‐energy level and deepening of the sedimentation basin and the open sea environment (Afghah, 2016; Esmeray‐Senlet et al, 2015; Flügel, 2004). Microfacies 3 was previously recorded as an open marine palaeoenvironment in Interior Fars area (SW of Iran) by Afghah et al (2014).…”

Section: Facies Analysismentioning

confidence: 99%

Larger benthic and planktonic biostratigraphy and facies of Albian sediments in Coastal Fars Zone (Zagros area, south‐west Iran)

et al. 2021

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A total of 64 samples were collected from the Kazhdumi Formation (Albian) of south Zagros Basin (Coastal Fars Zone) in order to study the biostratigraphy and analyse the lithofacies. Stratigraphic distribution of identified larger benthic and planktonic foraminifers has confirmed the presence of three successive biozones: Mesorbitolina subconcava‐Orbitolina discoidea Zone, Favusella washitensis Zone followed by an upper Conicorbitolina conica‐Mesorbitolina parva Zone. Generally, orbitolinids are well developed in the Albian succession in the studied section, whereas the stratigraphic distribution of planktonic foraminifers is more restricted, dominating the Favusella washitensis Zone. Nevertheless, microscopic investigation recognizes five microfacies consisting of extraclast‐foraminifer packstone, peloid‐intraclast Orbitolina wackestone, foraminiferal plankton wackestone, intraclast‐Orbitolina grainstone, and coral‐rudist wackestone, which indicated a shallow water carbonates palaeoenvironment (intertidal, lagoon, bar) and open marine. The alternation of both planktic and benthic foraminifera through the Kazhdumi Formation confirms a rapid transgression and regression in the studied section during Albian time, which is attributed to Kazerun basement fault behaviour in the mentioned time interval.

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“…In contrast, the micropalaeontological content of the Tarbur Formation is still poorly constrained and taxonomic studies are lacking. Some taxa of calcareous algae and benthic foraminifera, often improperly illustrated, are indicated and illustrated in various recently published papers (Vaziri-Moghadam et al 2005;Afghah 2009Afghah , 2016Maghfouri-Moghaddam et al 2009;Rajabi et al 2011;Abyat et al 2012Abyat et al , 2015Afghah & Farhoudi 2012;Pirbaluti & Abyat 2013;Afghah & Yaghmour 2014). Several determinations, however, are incorrect and therefore need revision (e.g.…”

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confidence: 99%

Tarburina zagrosianan. gen., n. sp., a new larger benthic porcelaneous foraminifer from the late Maastrichtian of Iran

Schlagintweit¹,

Rashidi

Barani

2016

Journal of Micropalaeontology

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A new larger benthic porcelaneous foraminifer of soritid affinity is described as Tarburina zagrosiana n. gen., n. sp. from the late Maastrichtian of the Tarbur Formation, Zagros Zone, SW Iran. It occurs in foraminiferal-dasycladalean wackestones and packstones, in association with Loftusia ssp., dicyclinids/cuneolinids, Neobalkhania bignoti Cherchi & Schroeder, Gyroconulina columellifera Schroeder & Darmoian, Spirolina? farsiana Schlagintweit & Rashidi, Broeckina cf. dufrenoyi (d'Archiac), other benthic foraminifers, and dasycladalean algae. Due to its elongate test and marginal chamber subdivision by aligned vertical partitions, Tarburina n. gen. can be compared with representatives of the Praerhapydionininae. The interio-marginal slit-like foramina/aperture of Tarburina represents an outstanding feature in complex porcelaneous taxa. The monospecific genus Tarburina is considered a Maastrichtian newcomer within the Late Cretaceous Global Community Maturation cycle of larger benthic foraminifera. A biostratigraphic and palaeobiogeographical restriction seems possible, as reported for many other Late Cretaceous larger benthic foraminifera.

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Biostratigraphy, facies analysis of Upper Cretaceous–Lower Paleocene strata in south Zagros basin (southwestern Iran)

Cited by 16 publications

References 21 publications

Biostratigraphy, facies analysis and sequence stratigraphy of the Sachun Formation (Interior Fars, Zagros, SW of Iran)

Biostratigraphy, facies analysis and sequence stratigraphy of the Sachun Formation (Interior Fars, Zagros, SW of Iran)

Larger benthic and planktonic biostratigraphy and facies of Albian sediments in Coastal Fars Zone (Zagros area, south‐west Iran)

Tarburina zagrosianan. gen., n. sp., a new larger benthic porcelaneous foraminifer from the late Maastrichtian of Iran

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