Structural geometry and evolution of the Dehdasht Basin in the Central Zagros fold-and-thrust belt: Implications for the timing of oil generation and trap formation

Heydarzadeh, Kobra; Hajialibeigi, H; Gharabeigli, Gholamreza

doi:10.1016/j.petrol.2021.109254

Cited by 3 publications

(2 citation statements)

References 46 publications

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“…Advances have been made through multiproxy-based computer simulations (e.g., Schönborn, 1999;Tozer et al, 2002;Watkins et al, 2014;Jourdon et al, 2014;Tavani et al, 2018;Balestra et al, 2019) and laboratory analogue modelling (e.g., McClay, 1995;Bellahsen & Daniel, 2005;Di Domenica et al, 2014;Santolaria et al, 2022), making balancing and restoration techniques faster and more precise. However, most of these efforts are limited to 2D reconstructions that do not fully capture the geometry of the orogenic belt and the shortening rates and structural style variations along the strike of the domains (e.g., Mazzoli et al, 2005;King et al, 2010;Caricchi et al, 2015;Castelluccio et al, 2016;Molli et al, 2018;Heydarzadeh et al, 2022).…”

Section: Stratigraphymentioning

confidence: 99%

Geological map, balanced and restored cross-sections, and 3D geological model of the Monte Fema area, Umbria-Marche Apennines (Italy)

Basilici,

Pedini,

Spinaci

et al. 2023

IJG

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The Mt. Fema area is located within the 1:50,000 scale Sheet 325-Visso of the CARG project, in the Umbria-Marche Apennines. Here, inherited pre-orogenic deformation and multi-layered mechanical stratigraphy affect mountain belt evolution and cause along-and across-strike changes in structural architecture. Further complexity is caused by post-orogenic extensional tectonics dissecting the fold and thrust belt. In this work, we combined classical field methodologies with digital mapping and drone surveys to produce a 1:10,000 geological map of the Mt. Fema area. The resulting map was integrated with a 10 m-cell size DEM in a 3D environment to construct four balanced cross-sections that were used to document structural style and stratigraphic variations. One section was restored to quantify the amount of deformation related to both Neogene orogenic shortening and multiple extensional phases affecting the area. Ultimately, we built a 3D geological model to investigate the subsurface geometrical arrangement of strata and faults of different generations, thus the overall structural architecture of the fold and thrust belt. According to our interpretation, the Mt. Fema thrust system is characterised by relatively limited displacement (cumulative dip separation ranging from ~100 m to the north in Val di Tazza to ~500 m to the south in Valnerina). Reactivation of inherited normal faults was likely precluded because of their unfavourable orientation with respect to W-dipping thrusts. Inherited basin structure and mechanical stratigraphy govern folding by buckling mechanism, which in turn controls the locus of thrust propagation. Normal faults dissect the crestal region of the Mt. Fema anticline. These structures do not show evidence of surface faulting during recent seismic sequences, although earthquake epicentres fall within the study area. Our work provides new insights into the 3D structural architecture, timing, and kinematics of a key sector of the Umbria-Marche Apennines, with implications for a better understanding of the role of structural inheritance and subsequent extensional tectonics in the evolution of fold and thrust belts.

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Section: Stratigraphymentioning

confidence: 99%

Geological map, balanced and restored cross-sections, and 3D geological model of the Monte Fema area, Umbria-Marche Apennines (Italy)

Basilici,

Pedini,

Spinaci

et al. 2023

IJG

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“…A particular challenge is that the Dehdasht basin consists of up to 6 km thick evaporates, the Gachsaran formation, overlaying the potential reservoir host rocks (Heydarzadeh et al 2020(Heydarzadeh et al , 2021. Several 2-D active seismic profiles from the National Iranian Oil Company (NIOC) crossed the Dehdasht area.…”

Section: Introductionmentioning

confidence: 99%

3-D body-wave tomography from the seismic ambient noise recorded by a dense array in the Dehdasht area, Iran

Riahi

Shomali

Obermann

et al. 2023

Geophysical Journal International

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Summary The strong attenuation of the thick sedimentary layers in the Dehdasht region, Iran, renders active seismic exploration surveys difficult. The imaging of the existent limestone reservoirs is limited to the shallow subsurface due to the strong attenuation of seismic waves. Here, we discuss a different approach to imaging the subsurface using body waves extracted from the cross-correlation of the seismic ambient wave-field. We discuss the technical challenges to extracting clear P- wave arrivals from the seismic ambient wave-field of a dense 3-component seismic array deployed in the Dehdasht basin. We invert the data for the 3D P- wave velocity structure and compare the velocity model with results from the 2D active seismic surveys in the area. The results show the potential of using body waves extracted from the seismic ambient wave-field for imaging purposes in highly attenuating areas.

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The Role of Razak Fault in Controlling the Sedimentary Basin and Hydrocarbon Systems in External Fars Region, Zagros, Iran

Hosseinpour,

Arian,

Maleki

et al. 2023

Geotecton.

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Structural geometry and evolution of the Dehdasht Basin in the Central Zagros fold-and-thrust belt: Implications for the timing of oil generation and trap formation

Cited by 3 publications

References 46 publications

Geological map, balanced and restored cross-sections, and 3D geological model of the Monte Fema area, Umbria-Marche Apennines (Italy)

Geological map, balanced and restored cross-sections, and 3D geological model of the Monte Fema area, Umbria-Marche Apennines (Italy)

3-D body-wave tomography from the seismic ambient noise recorded by a dense array in the Dehdasht area, Iran

The Role of Razak Fault in Controlling the Sedimentary Basin and Hydrocarbon Systems in External Fars Region, Zagros, Iran

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