Impact of inversion tectonics on the spatial distribution of hydrocarbon traps in the NW Persian Gulf and the southern Dezful Embayment, SW Iran

Riahi, Zahra; Sarkarinejad, Khalil; Faghih, Ali; Soleimany, Bahman; Payrovian, Gholam Reza

doi:10.1016/j.marpetgeo.2021.105364

Cited by 8 publications

(2 citation statements)

References 94 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Following the opening of the Neo‐Tethys Ocean between the Arabian margin of the African Plate and the Cimmerian continental blocks in the middle to late Permian, the Triassic to Cenomanian post‐rift thermal subsidence stage was characterized by the development of a passive continental margin carbonate platform (Sharland et al ., 2001). During the latest Cenomanian to earliest Turonian, the passive continental margin changed into an active margin due to the positive tectonic inversion driven by major stress direction reversals in the Neo‐Tethys basin (Glennie, 2000; Sharland et al ., 2001; Hollis & Sharp, 2011; Riahi et al ., 2021). This was associated with the formation of shallow‐water carbonate platforms and intrashelf basins along the Arabian margin of the African Plate (Alsharhan & Nairn, 1986), as well as the development of several troughs and palaeo‐highs in south‐west Iran and elsewhere, primarily due to the reactivation of basement faults or salt migration (the Infracambrian Hormuz Salt Series) across the Arabian Plate (e.g.…”

Section: Geological Settingmentioning

confidence: 99%

Aptian Oceanic Anoxic Event 1a in the shallow, carbonate‐dominated intrashelf Kazhdumi Basin, Zagros Mountains

et al. 2023

View full text Add to dashboard Cite

The early Aptian Selli Oceanic Anoxic Event 1a (ca 120 Ma) is a major Mesozoic episode of biotic, climatic, environmental and geochemical perturbations associated with the extensive burial of organic matter. Based on the new sedimentological, biostratigraphic and carbon‐isotope data from the Kazhdumi Intrashelf Basin, this study tracks the Oceanic Anoxic Event 1a‐associated perturbations along the north‐eastern margin of the Arabian Plate. The studied succession has five complete third‐order sequences with three facies associations: (i) deep open‐marine and intrashelf basin; (ii) shallow open‐marine mid‐ramp; and (iii) inner ramp. The Oceanic Anoxic Event 1a‐equivalent deposits include the former two facies associations – (i) and (ii) – and are 25 to 31 m thick, which corresponds to the accumulation rates of ca 1.9 to 3.1 cm kyr−1 (uncorrected for compaction) based on the 1.0 to 1.3 Myr duration of the event. The interval retained a high‐resolution record of carbon‐isotope and sea‐level fluctuations, which enables correlation across the Arabian Plate and Tethys. The Oceanic Anoxic Event 1a onset is marked by a biotic change from ostreid‐dominated shallow‐marine limestone with abundant foraminifera (Palorbitolina lenticularis and Choffatella decipiens) to dark grey deep‐water planktonic foraminifera‐rich and radiolaria‐rich limestone with chert and organic‐rich shale (Radiolarian Flood Zone). The upper oceanic anoxic event part of 1a is characterized by the shallowing‐upward, backstepping facies marking the return to a shallow open‐marine setting, albeit without recovery of the Palorbitolina–Choffatella association. Deep open‐marine deposition (Kazhdumi Tongue) was restored early during the Oceanic Anoxic Event 1a recovery in the latest early Aptian. A return to shallow open‐marine environments with Mesorbitolina‐rich limestone marks the beginning of the late Aptian, followed by a major sea‐level fall and karstification. This study resolves some of the uncertainties related to the order and timing of the events influencing the environmental disturbances across the eastern Arabian Plate during Oceanic Anoxic Event 1a and stresses the importance of shallow carbonate‐dominated intrashelf basins as faithful recorders of carbon‐isotope and sea‐level oscillations and palaeoenvironmental changes during global oceanic perturbations.

show abstract

Section: Geological Settingmentioning

confidence: 99%

Aptian Oceanic Anoxic Event 1a in the shallow, carbonate‐dominated intrashelf Kazhdumi Basin, Zagros Mountains

et al. 2023

View full text Add to dashboard Cite

show abstract

“…The Hercynian orogeny locally eroded the Palaeozoic mega-sequence resulting in the direct deposition of Permo-Mesozoic rocks over the basement (e.g. Faqira et al 2009;Riahi et al 2021). Permo-Triassic sea progression is determined by the deposition of basal red conglomerates and sandstones of the Faraghan Formation (Alavi, 2007).…”

Section: Structures and Stratigraphymentioning

confidence: 99%

Effect of inherited structural highs on the structure and kinematics of the South Dezful Embayment, SW Iran

et al. 2022

View full text Add to dashboard Cite

Understanding the structural evolution of the South Dezful Embayment (SDE) in the Zagros Fold-and-Thrust Belt (ZFTB) is significant for hydrocarbon exploration and production. The structural evolution of this area has been controlled by the reactivation of basement structures related to the oblique convergence along the ZFTB. In this work, we study the effect of the pre-contractional interaction between the basement step and overlaid salt layer superimposed by the Zagros shortening on the structural style and evolution of the sedimentary basin in the SDE. We use multidisciplinary approaches involving surface and subsurface data and analogue models. Disharmonic folds with small wavelength formed over the Kharg-Mish Palaeo-high (KMPH) where the sedimentary cover is thinner. On the other hand, faulted detachment folds with large wavelengths developed in the adjacent depocenters. Furthermore, the KMPH affected the geometry and kinematics of the frontal part of the Zagros Belt, which is characterized by the Mountain Front Flexure (MFF) topographic step. Long-lasting active deformation of the sedimentary cover over the frontal ramp of the KMPH developed the South Izeh Promontory (SIP). Localized contraction in the SIP was accommodated temporally by trishear fault-propagation folding and resulted in > 5 km elevation difference between this promontory and two adjacent local basins. Supporting scaled analogue models show that structural evolution, folding and along-strike variations in fold style of the SDE have been controlled by thickness variations of the sedimentary cover and the geometry of the inherited pre-salt structure. Based on the results of this study, the effect of inherited structural highs on the structure and kinematics of the SDE provide important insights for hydrocarbon entrapment, migration and exploration.

show abstract

Integration of remote sensing and geophysical data for structural lineaments analysis in the Rag-e-Sefid oil/gas field and surrounding areas, SW Iran

et al. 2023

View full text Add to dashboard Cite

Impact of inversion tectonics on the spatial distribution of hydrocarbon traps in the NW Persian Gulf and the southern Dezful Embayment, SW Iran

Cited by 8 publications

References 94 publications

Aptian Oceanic Anoxic Event 1a in the shallow, carbonate‐dominated intrashelf Kazhdumi Basin, Zagros Mountains

Aptian Oceanic Anoxic Event 1a in the shallow, carbonate‐dominated intrashelf Kazhdumi Basin, Zagros Mountains

Effect of inherited structural highs on the structure and kinematics of the South Dezful Embayment, SW Iran

Integration of remote sensing and geophysical data for structural lineaments analysis in the Rag-e-Sefid oil/gas field and surrounding areas, SW Iran

Contact Info

Product

Resources

About