The study area is located within the high folded of the northwestern segment of the
Zagros Foreland Fold Thrust Belt in northeast of Iraq. Joints, mesofaults, veins and
stylolites were studied through seven stations in the Kosrat Anticline. The trend of
the fold and the strike of the strata are of NW-SE direction in accordance with the
main trend of Zagros folds.
New geological map and cross section of the study area were constructed. The
exposed rocks of the studied area range in age from Cretaceous up to the Eocene
included the following formations (Qamchuqa, Kometan, Shiranish, Tanjero,
Kolosh and Sinjar) Kometan and Tanjero formations was taken in consideration for
brittle failure analysis . The analyzed structural field data indicate that the
investigated area was subjected throughout its geological history to four stress
phases. First is primary compressive tectonic phase in the directions N-S, NE-SW
and successive phase in the direction ENE-WSW. The second compressive
tectonic stress in the direction NW-SE considered as a secondary phase. Third was
extension tectonic phase in the direction NE-SW which developed during the final
uplift stage of folding is normal to the major folds trend. The fourth is NW-SE
extension face considerate as extension stress related to the primary NE-SW
compressive stress.
Small lensoidal bodies of massive and disseminated chromitites have been examined inassociation with ultramafic rocks of the Mawat Ophiolite Complex (MOC), Iraqi ZagrosThrust Zone, Northeastern Iraq. The Chromites ore have variable thickness enveloped bydunite and of, exhibiting transitional boundaries to harzburgitic host rocks.The primary Chromite composition exhibits high Cr varieties; the average Cr# ofChromite is 0.714, with < 0.3 % TiO2 content, which may reflect the crystallization ofChromite from boninitic magma. The result of the gravity survey leads to lateraldelineation of the ore body and estimates an area of about 2800 m2. The thicknesses of different Chromite pods were estimated to be in the range of 10 – 35 m. Structural feature show that such ore bodies have internal structure making angle of 10–12 degrees with dunite wall and surrounding peridotite which indicates that Chromite ore subconcordant type.
A structural and engineering geological study of rock slope stability was carried out in six stations that lie in the Southwest of Baranan mountain, along Sirwan road. The rock slopes and discontinuities were surveyed at each of these stations, and the relationships with failures were determined. The slopes were classified on the basis of (Al-Saadi, 1981), and the rocks were described in engineering terms according to (Anon, 1972) and (Hawkins, 1986), Stereographic projection was made using software (GEOrient 9.5.0) to represent the field data that were recorded in order to understand the situation in the six stations (sites) that were chosen along Sirwan road near Darbandikhan dam, the failures' types were recorded during field study were rock fall, toppling, and sliding. The study also revealed that the factors affecting slope stability in the study area were slope angle, height, dip of strata, and discontinuities. The laboratory test of the rock samples (point-load test) showed that the average value of compressive strength of the rock for the study area is about 181.29 MPa.Some measures are proposed to stabilize the slopes in the mentioned stations including; the removal of blocks liable to toppling in the critical cases (sites 2 and 6), casing the slopes with covenant materials such as concrete (site 4) and gabions (sites 2 and 6), with construction of retaining walls and digging of protective trenches to protect the slopes and reduce their hazard on the road (site 1, 3, and 5).
The Cretaceous sequence of northeast Iraq form an important petroleum system in housing potential source rocks such as the Balambo, Sarmord and partly Shiranish Formations. It also includes an important reservoir rocks accompanied by good secondary porosity such as the Qamchuqa and Kometan Formations. This study examined three surface localities at Pira Migroon anticline, northeast of Sulaimani city, and three subsurface wells of neighboring oil fields: Miran East (ME-1) , Bazian (Ba-1), and Chemchamal (Ch-2) from Sulaimani area of Kurdistan region of northeastern Iraq. The study applies stratigraphic analysis, microfacies investigations, and lithostratigraphic correlation in an attempt to characterize these units at this area, and to give an insight regarding their stratigraphic architecture's impact on the development of the important Cretaceous petroleum system of the area.
scite is a Brooklyn-based organization that helps researchers better discover and understand research articles through Smart Citations–citations that display the context of the citation and describe whether the article provides supporting or contrasting evidence. scite is used by students and researchers from around the world and is funded in part by the National Science Foundation and the National Institute on Drug Abuse of the National Institutes of Health.