Paleostress analysis from brittle failure and minor structures in Dokan Area, Kurdistan Region, NE of Iraq.

Al-Hakari, Salim. H. Sulaiman

doi:10.17656/jzs.10522

Cited by 4 publications

(6 citation statements)

References 6 publications

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“…L14 lineament stretches for about 69 km in WNW direction. It is almost parallel to the Baranan Homocline and coincides well with the Baranan Back Thrust Fault (BBTF) (Figure 7) which is reported in previous studies (Al‐Hakari, 2011; Stevanovic & Markovic, 2004). The BBTF is reported to be an SW‐dipping basement fault which is displayed on the surface as Baranan Homocline verging to the hinterland (Al‐Hakari, 2011).…”

Section: Resultssupporting

confidence: 87%

“…It is almost parallel to the Baranan Homocline and coincides well with the Baranan Back Thrust Fault (BBTF) (Figure 7) which is reported in previous studies (Al‐Hakari, 2011; Stevanovic & Markovic, 2004). The BBTF is reported to be an SW‐dipping basement fault which is displayed on the surface as Baranan Homocline verging to the hinterland (Al‐Hakari, 2011). The L15 magnetic lineament, which extends in NW–SE direction for about 140 km, runs between and parallel to the BBTF and ZMFF (Figure 7).…”

Section: Resultssupporting

confidence: 87%

“…This fault displaces the Zagros MFF (ZMFF) about 17 km right laterally (Figure 7). Based on the field observation, dextral strike‐slip movement detected along this fault (Al‐Hakari, 2011). However, this fault is not reported on the tectonic maps of Iraq (e.g.…”

Section: Resultsmentioning

confidence: 99%

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Potential field survey of subsurface structures of the NW segment of the Zagros Fold‐Thrust Belt, Kurdistan Region

Qadir,

Baban,

Aziz

et al. 2023

Geophysical Prospecting

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This study reports results of gravity and magnetic surveys conducted for the first time in the western segment of the Zagros Fold‐and‐Thrust Belt in the Kurdistan Region. This study attempts to delineate deep structures in an area, which has not been surveyed before. CG‐5 Autograv gravimeter and G‐857 portable proton‐precession magnetometer were used to acquire gravity and magnetic data from 750 stations along over eleven traverses across and parallel to the Zagros trend (NW–SE). Six of these traverses are parallel to the Zagros trend, whereas the others are perpendicular to the trend of the other traverses and can be tied where they intersect. The total length of the traverses is about 1000 km. Tilt Angle of horizontal gradient method is used to detect regional gravity and magnetic lineaments. The mapped lineaments from regional gravity and magnetic surveys are divided into two categories: the NE–SW lineaments, which represent transversal faults in the study area, and the NW–SE lineaments, which represent the Zagros Thrust Faults, some of which may be linked to the inverted basement normal faults of Arabian passive margin (the NW–SE Najd Fault system). The results show that there is a relationship between the regional gravity and magnetic lineaments outlining the same deep geological features. The data presented here confirm the presence of regional longitudinal and transversal lineaments documented in other studies (e.g. Anah‐Qalat Dizeh Fault, Surdash‐Tikrit Fault, Sirwan Fault, Khanaqin Fault, Zagros Mountain Front Fault, Baranan Back Thrust Fault and High Zagros Reverse Fault) and outlines new lineaments not mapped before. Most of the detected regional lineaments in the current study coincide with the previously confirmed lineaments, which have played a significant role in the tectonic evolution of the Zagros Fold‐and‐Thrust Belt. As such, this study contributes to a better understanding of the subsurface structure of the Kurdistan segment of the Zagros Fold‐and‐Thrust Belt and probably the rest of the belt.

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Section: Resultssupporting

confidence: 87%

Section: Resultssupporting

confidence: 87%

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Potential field survey of subsurface structures of the NW segment of the Zagros Fold‐Thrust Belt, Kurdistan Region

Qadir,

Baban,

Aziz

et al. 2023

Geophysical Prospecting

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“…Pulkhana anticline is considered as of a Fault -Propagation Fold type [27][28][29][30][31] . The dip of the south western limb of the anticline was previously reported to be about 70⁰, whereas the dip of the north eastern limb reached to 50º [18].…”

Section: Discussionmentioning

confidence: 99%

Paleostress Analysis of the Northeastern Limb of Pulkhana Anticline /NE Iraq: Implications for Arabian Plate Tectonic Evolution

Othman

Jadda²

2020

eijs

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Pulkhana anticline is located in Tuzhurmatu area, about 50 km SE of Kirkuk city. The study area forms a part of the Zagros Folded Zone which is situated in the unstable shelf of Iraq within the physiographic zone called Foothill Zone (in the middle of Hemrin- Makhul subzone). The north eastern limb of the anticline reaches to 50ᵒ and the dip of the south western limb reaches to 70ᵒ. The core of the structure comprises the rocks of Fat’ha Formation surrounded by rocks of Injana and Mukdadiya Formations, whereas Bai-Hasan Formation forms the slopes of the low hills surrounding the anticline. These Formations range in age from Middle Miocene to Pliocene. More than 761 readings of joint planes were collected from 20 stations within 5 traverses in the study area. The study of joint sets and system was within Injana and Mukhdadiya formations, along traverses with 3-5 stations for each travers track. The results showed the presence of two sets of tension joints (bc, ac) and five sets of shear joints, through defining the maximum stress axis (σ1) and acute angle dividers for these conjugate joints. It was determined that two directions of Paleostress are present in the area, which are NE-SW and NW-SE. The direction of the first major stress (NE-SW) is orthogonal with, or normal to, the fold axis in the study area, which can be considered as a horizontal component which resulted from oblique collision of Arabian and Eurasian Plates. This old compressive stress is the reason behind the formation of the tension joint (ac) and shear joints, where the sets (ac) and system are perpendicular-semi perpendicular to the bedding plane, as they were formed at an early stage of folding. Also, the ) joint was formed in five tectonic stages with different time intervals. Joints formed in different tectonic stages, in the study area, are attributed to oblique collision of Arabian and Eurasian plates and counter clockwise rotation of Arabian plate relative to Eruasian plate.

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“…The ridge of Tasluja is a predominant downward topographic expression that can be discovered within the middle part of the Miran Field. The compression from the Tertiary has caused the western and eastern structures to reach their peak; at the Late Miocene, the compression is terminated through the thrusting phase [12]. Additionally, the surface expressions of the east and west structures within the Miran Field are non-considerable, as there is little surface evidence for these structures.…”

Section: The Study Areamentioning

confidence: 99%

Reservoir Characterization of the Upper Part of Qamchuqa Formation from Miran and Bazian Oilfields in Kurdistan Region, NE Iraq

Salih,

Qader

2023

Tikrit J. Pure Sci.

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Reservoir characterization of the upper part of Qamchuqa Formation at the wells of Miran West-2 (MW-2) and Bazian-1 (BN-1) is studied. This formation typically has low shale content at the BN-1 well. At the same time, in the MW-2 well, the middle part of the studied formation is dominated by shaly and shale intervals, possibly affected by the Sarmord and Balambo depositional environments. Although the upper part of Qamchuqa Formation is mainly composed of dolomite with minor dolomitic limestone, marl and shale are occasionally present. Furthermore, porosity values are commonly less than 15% in both wells; nevertheless, there are a few intervals where porosity significantly increases. The formation at the BN-1 well has a higher porosity than the MW-2 well. Moreover, the secondary porosity is relatively low as 4.0% at the MW-2 well, while in the well of BN-1, it ranges between < 4.0% and 7.5%. The measured permeability of the formation suggests good permeability. According to the shale volume, porosity, and permeability, the upper part of Qamchuqa Formation is subdivided into three reservoir units. RU 1 at the MW-2 well and RU 2 at the BN-1 well have the most substantial reservoir properties. However, the lowest reservoir quality appears within RU 1 of the BN-1 well and RU 2 at the well of MW-2. Additionally, residual hydrocarbons constitute an extensive fraction of the pore spaces, while tiny portions of the moveable one can be discovered along all reservoir units of the formation. Finally, considering the hydrocarbon movability of the MW-2 well, the upper part of Qamchuqa Formation is defined by primarily movable oils in RU 1 and 2. In contrast, moveable oils are detected in almost all of the reservoir units of the BN-1 well.

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Paleostress analysis from brittle failure and minor structures in Dokan Area, Kurdistan Region, NE of Iraq.

Cited by 4 publications

References 6 publications

Potential field survey of subsurface structures of the NW segment of the Zagros Fold‐Thrust Belt, Kurdistan Region

Potential field survey of subsurface structures of the NW segment of the Zagros Fold‐Thrust Belt, Kurdistan Region

Paleostress Analysis of the Northeastern Limb of Pulkhana Anticline /NE Iraq: Implications for Arabian Plate Tectonic Evolution

Reservoir Characterization of the Upper Part of Qamchuqa Formation from Miran and Bazian Oilfields in Kurdistan Region, NE Iraq

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