The end-Permian regression in the western Tethys: sedimentological and geochemical evidence from offshore the Persian Gulf, Iran

Tavakoli, Vahid; Naderi-Khujin, Mehrangiz; Seyedmehdi, Zahra

doi:10.1007/s00367-017-0520-8

Cited by 31 publications

(12 citation statements)

References 67 publications

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“…Analysis of uppermost Permian microfacies associations from South Tibet reveals a rapid regression. This rapid regression has been reported widely, including along the northern margin of peri‐Gondwana (Wignall & Hallam, ; Baud et al ., ), in the Western Tethys (Tavakoli et al ., ) and in the Eastern Tethys (Yin et al ., ). This rapid global regression is clearly reflected in the Selong section by the sudden shift from a lower outer ramp microfacies association to an inner ramp microfacies association, along with transient subaerial exposure.…”

Section: Discussionmentioning

confidence: 99%

Facies and evolution of the carbonate factory during the Permian–Triassic crisis in South Tibet, China

Song

Woods

et al. 2019

Sedimentology

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The nature of Phanerozoic carbonate factories is strongly controlled by the composition of carbonate-producing faunas. During the Permian-Triassic mass extinction interval there was a major change in tropical shallow platform facies: Upper Permian bioclastic limestones are characterized by benthic communities with significant richness, for example, calcareous algae, fusulinids, brachiopods, corals, molluscs and sponges, while lowermost Triassic carbonates shift to dolomicrite-dominated and bacteria-dominated microbialites in the immediate aftermath of the Permian-Triassic mass extinction. However, the spatial-temporal pattern of carbonates distribution in high latitude regions in response to the Permian-Triassic mass extinction has received little attention. Facies and evolutionary patterns of a carbonate factory from the northern margin of peri-Gondwana (palaeolatitude ca 40°S) are presented here based on four Permian-Triassic boundary sections that span proximal, inner to distal, and outer ramp settings from South Tibet. The results show that a cool-water bryozoan-dominated and echinodermdominated carbonate ramp developed in the Late Permian in South Tibet. This was replaced abruptly, immediately after the Permian-Triassic mass extinction, by a benthic automicrite factory with minor amounts of calcifying metazoans developed in an inner/middle ramp setting, accompanied by transient subaerial exposure. Subsequently, an extensive homoclinal carbonate ramp developed in South Tibet in the Early Triassic, which mainly consists of homogenous dolomitic lime mudstone/wackestone that lacks evidence of metazoan frame-builders. The sudden transition from a cool-water, heterozoan dominated carbonate ramp to a warm-water, metazoan-free, homoclinal carbonate ramp following the Permian-Triassic mass extinction was the result of the combination of the loss of metazoan reef/mound builders, rapid sea-level changes across Permian-Triassic mass extinction and profound global warming during the Early Triassic.

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Section: Discussionmentioning

confidence: 99%

Facies and evolution of the carbonate factory during the Permian–Triassic crisis in South Tibet, China

Song

Woods

et al. 2019

Sedimentology

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“…For example, the end-Permian regression is recorded in South China showing a close association with the pan-South China volcanism (see Yin et al, 2014). In addition, offshore Persian Gulf in the western Tethys also exhibits end-Permian regression (Tavakoli et al, 2018). Likewise, the northern part of Gondwana has recorded an episode of first-order sealevel fall (Shen et al, 2006;Yin et al, 2007), where it has caused gaps in the stratigraphic record and associated mass extinction.…”

Section: Depositional Modelling and Sea-level Changesmentioning

confidence: 99%

“…However, the end-Permian time is also characterized by a sea-level fall, for example, a sea-level low stand is recorded in the upper Khartam Member of the Khuff Formation in Saudi Arabia, offshore Persian Gulf, western Tethys, South China, and the northern margin of the Indian Plate (Al-Aswad, 1997;Eltom, Abdullatif, Makkawi, & Eltoum, 2017;Shah, 2009;Tavakoli, Naderi-Khujin, & Seyedmehdi, 2018;Yin et al, 2014). A major episode of regression is also recorded in the northern part of Gondwana (Shen et al, 2006;Yin, Feng, Lai, Baud, & Tong, 2007).…”

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confidence: 99%

The Late Permian clastic–dominated carbonate shelf, Northwestern Pakistan: Implications for palaeoenvironments, palaeoclimate, and reservoir modelling

et al. 2021

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The Indus Basin of Pakistan has archived thick and laterally extensive Permian carbonates. The current study focuses on constraining the palaeoenvironments, reservoir potential, and ambient climatic conditions during the deposition of Late Permian clastic-dominated carbonates of the Chhidru Formation, Indus Basin, Pakistan. At outcrop, the unit shows laterally variable thicknesses of dominantly thick-bedded, fossiliferous, channelized calcareous sandstone, and sandy limestone. The microscopic textural, compositional, and biotic attributes divulged four microfacies, arguing for the deposition in a range of diverse depositional environments including lagoonal to deltadominated middle shelf. The deposition of clastic-rich carbonates of the Chhidru Formation on the underlying pure carbonates of the Wargal Formation hints strongly towards a sea-level fall on the northwestern margin of the Indian Plate. The regression tightly correlates with the stratigraphic record of the adjacent continents, including South China, the Persian Gulf, and northern Gondwana regions. The abundance of detrital material indicates terrestrial influx to the basin, inhibiting the benthic activity and consequently resulting in poor microfossil content. Nevertheless, 11 agediagnostic foraminiferal taxa were identified, suggesting a Late Wuchiapingian to Changhsingian age. The X-ray diffraction analysis of argillaceous horizons revealed several climate-sensitive clay minerals. Based on the dominance of illite, palygorskite, sepiolite, and chlorite, an extremely arid and cold climate is suggested for the region during the time of deposition of the Chhidru Formation. Petrographic observations suggest reworking of sediments shed from the Indian Shield of the Aravalli system and MalaniRange. The petrography, scanning electron microscopy, and energy dispersive X-ray spectroscopy revealed multiple diagenetic phases including marine, meteoric, and burial that have shaped the unit into a poor to moderate reservoir.

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“…The Zagros Mountains contain 8.6% of the oil and 15% of the gas of the world's proven reserves [24][25][26][27]. The NW/SE trending Zagros fold-and-thrust belt extends ~1800 km from Taurus Mountain to the Anatolian fault.…”

Section: Geological Settingmentioning

confidence: 99%

Evidence for Isolated Platform Development in the Cenomanian on the Passive Margin of Neotethys, Southwest Iran

2023

Self Cite

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In the Cenomanian, the southern passive margin of the Neotethys Ocean was dominated by a giant carbonate factory. This succession is known as Sarvak Formation, a significant reservoir in Iran. This study focuses on a detailed analysis of facies variations and paleoenvironmental reconstruction, including the interpretation of the platform types, during this time interval. Based on field observations and petrographical studies, 12 facies have been recognized and ascribed to six facies belts on a carbonate ramp. Sub-environments include the outer ramp and basin (distal open marine), talus and channel (mid-ramp) and lagoon and shoal (inner-ramp). The frequency of the facies and isochore maps indicate the paleoenvironmental conditions and their spatial variations in the study area. Based on all data and analyses, the suggested conceptual model for the Sarvak Formation in the Lurestan Zone is an isolated platform surrounded by two ramps. The upwind and downwind parts of these ramps were located in the central and northern sub-zones of the Lurestan Zone. This model can be used as a template for isolated platforms worldwide.

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The end-Permian regression in the western Tethys: sedimentological and geochemical evidence from offshore the Persian Gulf, Iran

Cited by 31 publications

References 67 publications

Facies and evolution of the carbonate factory during the Permian–Triassic crisis in South Tibet, China

Facies and evolution of the carbonate factory during the Permian–Triassic crisis in South Tibet, China

The Late Permian clastic–dominated carbonate shelf, Northwestern Pakistan: Implications for palaeoenvironments, palaeoclimate, and reservoir modelling

Evidence for Isolated Platform Development in the Cenomanian on the Passive Margin of Neotethys, Southwest Iran

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