Keywords : Anticline

Morphotectonic Evidences for Strike-Slip Component of the Reverse Fault at the Southeastern Plunge of Bashiqa Anticline

Alaa Hamdon

Iraqi National Journal of Earth Science, 2020, Volume 20, Issue 1, Pages 15-23
DOI: 10.33899/earth.2020.170315

Sedimentary rock beds and drainage pattern offset took place predominantly at the southeastern plunge of Bashiqa anticline which indicates shear zone in this area represented by apparent left-lateral fault separation of reverse fault dipping to the southeast. This study will discuss and update the geological information of the impressions of the fault on the surface topography based on the morphotectonic evidences including visual interpretation of the satellite image for the landforms and regional stress analysis of the study area. The variations of landform features are regarded as an efficient geological indicator for tectonic activity in the area.

The Structural and Tectonic Analysis of Mandan Anticline Northern Iraq

Saddam Essa Mustafa Al-khaton

Iraqi National Journal of Earth Science, 2013, Volume 13, Issue 2, Pages 35-56
DOI: 10.33899/earth.2013.79656

The study includes the structural and tectonic analysis of Mandan anticline. Mandan anticline consists of Fath'a, Injana and Muqdadiya Formations
(Middle Miocene, Upper Miocene and Lower Pliocene age). Structural and geometric analysis of the three studied traverses revealed its generally asymmetry. It's verging towards the southwest, and it's plunging toword southeast, meet each other with Maqlob anticline from the northwest. Also the fold axis changes anticlockwise from the first traverse to the second traverse, and then clockwise to the third traverse, this is because the influence of fold to three strike-slip faults.
Fourier analysis shows that in traverse II and III the northeast limb of the fold changes from chevron to chevron sinusoidal shape. The southwest limb changes from sinusoidal, parabolic and semi ellipses. The reasons for these changes is attributed to influence of fold to normal listiric foreland fault and two strike-slip faults at the second and third traverses.
The study shows also that the Mandan anticline influenced by two foreland listiric faults. The first was reverse fault affects the fold in the first traverse only then swerves south. The second affects the fold as a whole at the northern limb. This is known from the geometric analysis of the formations at limbs in the second traverse and between the three traverses. Field observations, satellite images and the DEM (Digital elevation model) revealed existence of three strike –slip faults, two are sinistral and the third is dextral, namely Bardarash, Sheikh khalik and the Coma Zard faults.