Ancient Carbonate Tidalites

Lasemi, Yaghoob; Jahani, Davood; Amin-Rasouli, Hadi; Lasemi, Zakaria

doi:10.1007/978-94-007-0123-6_21

Cited by 29 publications

(27 citation statements)

References 68 publications

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“…This fluctuation is interpreted to have resulted from an alternation between tidal currents and slackwater conditions. Rippled sandy layers record periods of bedload transport during more energetic periods, such as those created by the ebb or flood-tides (Reineck & Wunderlich, 1968;Lasemi et al, 2012). Slack-water periods allowed the deposition of carbonate mud (Reineck & Wunderlich, 1968;Lasemi et al, 2012).…”

Section: Discussionmentioning

confidence: 99%

“…Rippled sandy layers record periods of bedload transport during more energetic periods, such as those created by the ebb or flood‐tides (Reineck & Wunderlich, ; Lasemi et al ., ). Slack‐water periods allowed the deposition of carbonate mud (Reineck & Wunderlich, ; Lasemi et al ., ). These alternations correspond to the transitional zone between bedload‐dominated and suspension‐dominated environments described in tidal flats by Klein ().…”

Section: Facies Analysismentioning

confidence: 99%

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Sequence stratigraphic framework for mixed aeolian, peritidal and marine environments: Insights from the Pennsylvanian subtropical record of Western Pangaea

et al. 2016

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Due to difficulties in correlating aeolian deposits with coeval marine facies, sequence stratigraphic interpretations for arid coastal successions are debated and lack a unifying model. The Pennsylvanian record of northern Wyoming, USA, consisting of mixed siliciclastic–carbonate sequences deposited in arid, subtropical conditions, provides an ideal opportunity to study linkages between such environments. Detailed facies models and sequence stratigraphic frameworks were developed for the Ranchester Limestone Member (Amsden Formation) and Tensleep Formation by integrating data from 16 measured sections across the eastern side of the Bighorn Basin with new conodont biostratigraphic data. The basal Ranchester Limestone Member consists of dolomite interbedded with thin shale layers, interpreted to represent alternating deposition in shallow marine (fossiliferous dolomite) and supratidal (cherty dolomite) settings, interspersed with periods of exposure (pedogenically modified dolomites and shales). The upper Ranchester Limestone Member consists of purple shales, siltstones, dolomicrites and bimodally cross‐bedded sandstones in the northern part of the basin, interpreted as deposits of mixed siliciclastic–carbonate tidal flats. The Tensleep Formation is characterized by thick (3 to 15 m) aeolian sandstones interbedded with peritidal heteroliths and marine dolomites, indicating cycles of erg accumulation, preservation and flooding. Marine carbonates are unconformably overlain by peritidal deposits and/or aeolian sandstones interpreted as lowstand systems tract deposits. Marine transgression was often accompanied by the generation of sharp supersurfaces. Lags and peritidal heteroliths were deposited during early stages of transgression. Late transgressive systems tract fossiliferous carbonates overlie supersurfaces. Highstand systems tract deposits are lacking, either due to non‐deposition or post‐depositional erosion. The magnitude of inferred relative sea‐level fluctuations (>19 m), estimated by comparison with analogous modern settings, is similar to estimates from coeval palaeotropical records. This study demonstrates that sequence stratigraphic terminology can be extended to coastal ergs interacting with marine environments, and offers insights into the dynamics of subtropical environments.

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Section: Discussionmentioning

confidence: 99%

Section: Facies Analysismentioning

confidence: 99%

Sequence stratigraphic framework for mixed aeolian, peritidal and marine environments: Insights from the Pennsylvanian subtropical record of Western Pangaea

et al. 2016

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“…Carbonate rocks were classified according to the schemes of Dunhum, 1962 [5]. Facies analysis and vertical and lateral changes carried out based on [6]- [11]. Sequence Stratigraphy concepts developed by previous workers [2] [12]- [26] were extended to the current study.…”

Section: Methodsmentioning

confidence: 99%

“…Absence of subaerial exposure features indicates deposition in a subtidal lagoon or in an intertidal pond setting. In an arid climate, the pond facies may consist of planar stromatolite and/or evaporitic dolomudstone, depending on geographical location and salinity [11]. This facies is developed in upper intertidal pond setting.…”

Section: Facies A3 (Non Burrowed Mudstone)mentioning

confidence: 99%

Facies, Sedimentary Environment and Sequence Stratigraphy of Dalan Formation in South Fars, Iran —(Qatar-South Fars Arch) Well ASL-A

Rezavand¹,

Jahani²,

Asilian³

2016

OJG

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Dalan Formation is one of the most important gas reservoirs of south and southwest Iran which it belongs to Dehram Group and its age is Middle to Late Permian. The Dalan formation is interpreted as reflecting a major tectono-eustatic event related to the onset of rapid thermal subsidence of the early Neo-Tethys passive margin in Arabia and Iran, and the drowning of its rift shoulders. The Dalan formation consists mainly of medium to thick-bedded oolitic to micritic shallow-marine carbonate, with intercalations of evaporates. This formation overlies the Faraghan formation and extends up into the Lower Triassic kangan formation. The current paper is focused on the facies, sedimentary environment and sequence Stratigraphy study of the Middle to Upper Permian Dalan formation in the West Assaluyeh gas field the subsurface section of well ASL-A. Based on microfacies analysis and significant founa and flora, nineteen major facies in five facies associations including Tidal flat (A), Lagoon (B), Shoal (C), Open marine (D) and Mid ramp (E) were recognized in the Dalan formation. Facies analysis and those comparisons with modern and ancient environments indicated that the Dalan formation was deposited inner to mid parts of a homoclinal ramp. The sequence stratigraphy studies on the Dalan formation in this gas field led to assessment of seven main sedimentary sequences of the third-order in the Assaluyeh field, well ASL-A. The boundary between the third-order sequences with the Faraghan formation and between the Nar and Upper Dalan members are Subaerial Unconformity (SU) and the boundaries between the third-order sequences with each other and also with the Kangan formation are Correlative Conformity (CC). The main diagenetic processes in this formation are dolomitization, dissolution, anhydritization, cementation and compaction which played a significant role in improving reservoir quality. The shoal ooid grainstone facies with intergranular and oomoldic porosity * Corresponding author. N. Rezavand et al. 945 comprise the main reservoir facies of the Dalan formation.

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“…These facies are characterized by abundant bird's eyes (fenestral fabric). Prolonged exposure of the supratidal facies results in partial dissolution of carbonate grains and iron‐staining under arid to semi‐arid conditions (Lasemi et al ., ). The thin‐ to medium‐bedded stromatolite boundstone consists of flat to undulatory microbial laminates with parallel fenestrae (Table ).…”

Section: Facies and Depositional Settingsmentioning

confidence: 97%

Depositional systems and sequence stratigraphy analysis of the Upper Callovian to Tithonian sediments in the Central and Western Kopet‐Dagh Basin, Northeast Iran

Kavoosi

2015

Geological Journal

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Upper Callovian to Tithonian (late Jurassic) sediments represent an important hydrocarbon reservoir in the Kopet-Dagh Basin, NE Iran. These deposits consist mainly of limestone, dolostone, and calcareous mudstone with subordinate siliciclastic interbeds. Detailed field surveys, lithofacies and facies analyses at three outcrop sections were used to investigate the depositional environments and sequence stratigraphy of the Middle to Upper Jurassic interval in the central and western areas of the basin. Vertical and lateral facies changes, sedimentary fabrics and structures, and geometry of carbonate bodies resulted in recognition of various carbonate facies related to tidal flats, back-barrier lagoon, shelf-margin/shelf-margin reef, slope and deep-marine facies belts. These facies were accompanied by interbedded beach and deep marine siliciclastic petrofacies. Field surveys, facies analysis, parasequences stacking patterns, discontinuity surfaces, and geometries coupled with relative depth variation, led to the recognition of six third-order depositional sequences. The depositional history of the study areas can be divided into two main phases. These indicate platform evolution from a rimmed-shelf to a carbonate ramp during the late Callovian-Oxfordian and Kimmeridgian-Tithonian intervals, respectively. Significant lateral and vertical facies and thickness changes, and results obtained from regional correlation of the depositional sequences, can be attributed to the combined effect of antecedent topography and differential subsidence related to local tectonics. Moreover, sea-level changes must be regarded as a major factor during the late Callovian-Tithonian interval. Figure 4. Outcrop photograph indicates reef development on a palaeohigh.Onlapping of pelagic facies of the Chaman-Bid Formation onto an inherited topography was followed by aggradation and finally progradation of carbonate deposits south of Nabia Village (See Fig. 1 for location). With an increase in carbonate production after reef establishment in comparison to relative sea-level rise, aggradation was followed by progradational stacking pattern towards a nearby deep basin. This figure is available in colour online at wileyonlinelibrary.com/journal/gj. Figure 7. (A) High-resolution perspective image (courtesy of Google Earth) of the Kashafrud, the Chaman-Bid and the Mozduran formations. The picture represents onlapping and thinning of the Chaman-Bid Formation on the Middle Jurassic Kashafrud Formation towards the east. Progressive progradation of the Oxfordian carbonates of the Mozduran Formation into deeper marine facies is indicated by oblique clinoform geometry. This geometry signifies limited vertical and enough lateral accommodation space. (B) Ammonites concentrated on the top of an argillaceous limestone of the Chaman-Bid outcrop, indicating a maximum flooding surface (MFS). The length of the pencil is 14.3 cm. (C) Flute mark at the base of a sandstone layer, which was deposited on a submarine fan at the Chaman-Bid section. The arrow points to f...

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Ancient Carbonate Tidalites

Cited by 29 publications

References 68 publications

Sequence stratigraphic framework for mixed aeolian, peritidal and marine environments: Insights from the Pennsylvanian subtropical record of Western Pangaea

Sequence stratigraphic framework for mixed aeolian, peritidal and marine environments: Insights from the Pennsylvanian subtropical record of Western Pangaea

Facies, Sedimentary Environment and Sequence Stratigraphy of Dalan Formation in South Fars, Iran —(Qatar-South Fars Arch) Well ASL-A

Depositional systems and sequence stratigraphy analysis of the Upper Callovian to Tithonian sediments in the Central and Western Kopet‐Dagh Basin, Northeast Iran

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