Vol. 12 No. 3 (2012)
Articles
Abstract: The study area is within Wadi AL-Shour basin north eastern mosul city. This work includes the hydrological development of the basin and the preparation of an electronic map based on remote sensing technique. The technique is considered a very active tool for the determination of the surface drainage system, analysis of the morphomatric features of the basin and the study of the hydrological balance of the basin. It has also been used for the determination of input and output flow of basin waters, the suitability of the well waters for drinking and agricultural purposes and the improvement of the productivity of the basin through the design of a harvesting method for rain waters at the study area. The collected data is processed by the use of (GIS) software and the results obtained are gathered in a main data base as a digital layers, loading to the preparation of a purpose electronic map which could be used for the monitoring and developing the study area.
Abstract: Twenty-one surface samples from Avanah Formation dating to Middle Eocene cropping out in Dohuk area, northern Iraq, were studied for their nannofossils with light microscope .The study shows that the formation contains a rich and varied assemblage of nannofossils with a significant development of special forms such as Discoasters and Coccolithes . These forms are useful as stratigraphic indicators in Paleogene sediments and as paleoecological indicators of the studied area. One of these samples had being studied by Scanning Electron Microscope to show some of the diagnostic features of the studied species. The study resulted in the recognition of (12) species belong to (10) genera of calcareous nannofossils.
Abstract: Diagenesis were studied within Khurmala limestone Formation at Dokan area, Northeastern Iraq. The study recognized many diagenetic processes affected limestone within a successive sequence including micrite envelope, dolomitization, dissolution, neomorphism, cementation, mechanical and chemical compaction. The study determined four diagenetic zones. They are marine zone (micrite envelope), mixing zone (dolomitization), meteoric pheratic zone (dissolution, neomorphism, cementation) and burial zone (mechanical and chemical compaction). According to the history of diagenesis and their sequence, the study revealed that periodical fluctuation in sea level has influenced on diagenetic processes and their paragenetic sequence.
Abstract: The litho-and biostratigraphy of Shiranish Formation have been investigated within a well-exposed section at the southern limb of Bekhair anticline, Dohuk area, Northern Iraq. The studied section consists mainly of marl, marly limestone, and limestone. The Formation unconformably overlies Bekhme Formation and it is overlain unconformably by the Kolosh Formation. The samples of the section under investigation yielded rich and well diversified planktonic foraminiferal taxa, where 55 planktonic species belonging to 16 genera have been recognized, the detailed foraminiferal investigation permits the recognition of 8 well defined zones. These are from older at the base: 8. Plummerita hantkeninoides Total range Zone (Part). 7. Pseudoguembelina palpebra Partial range Zone. 6. Pseudoguembelina hariaensis Interval Zone. 5.Racemiguembelina fructicosa Interval Zone. 4. Planoglobulina acervulinoides Partial range Zone. 3. Contusotruncana contusa Interval Zone. 2. Gansserina gansseri Interval Zone. 1. Globotruncana aegyptiaca Interval Zone (Part). The Planktonic zones were correlated with other zonal schems in and outside Iraq. They are considered to be extending from middle Late Campanian to latest Maastrichtian.
Abstract: Three locations (Jarahyah, AynSfni and Zenaho Merry) were chosen in AynSfni plain surrounded by Ayn Sfni,Kand and Maqlob anticlines. The data were processed by the graphs of cartesian and polar approaches via using offset Wenner spread with fifteen measuring spaces in six azimuthal directions. The Jarahyah location shows directions of perpendicular and parallel fractures related to the surrounding fold axes as well as a major fracture with oblique direction and vertical dip .Two fractures with vertical and medium dips in addition to minor fractures with medium dips are also displayed in this location. The analytical graphs of AynSfni location indicate more than five fracture systems characterizing with different frequencies and high to medium dipping angles.These results were compared with study of previous field measurements of Shaikhan anticline lies north of the present study. The graphs of Zenaho Merry location display fractures of different frequencies, directions and dips. These results identify large frequencies of perpendicular orientations with vertical and medium dips while the parallel orientations are reduced in the comparison with the two previous lacations. This result leads to the conclusion that there is a different tectonic nature of Zenaho Merry location.
Abstract: The lithology and biostratigraphy of Bekhme Formation and lower part of Shiranish Formation have been investigated within a well – exposed section at the southern limb of Bekhair anticline, Dohuk area, north of Iraq. The section consists of marly limestone, limestone, conglomerate and marl. The lower contact of Bekhme Formation is not exposed in the studied area. The upper contact is unconformably overlain by the Shiranish Formation which consists of marl, limestone and marly limestone.The sequences of the section are characterized by rich foraminiferal faunas, where forty - eight planktonic species belonging to fourteen genera besides fifty - three benthonic species and subspecies belonging to forty genera have been recognized. The study of planktonic foraminifera resulted in the recognition of four biozones, these are from older at base: 4- Gansserina gansseri Interval Zone (part) (CF7). 3- Globotruncana aegyptiaca Interval Zone (CF8). 2- Globotruncanita stuarti – stuartiformis Partial Range Zone (CF9). 1- Globotruncanita calcarata Total Range Zone (part) (CF10). The larger benthonic foraminiferal fauna, which appears within five stratigraphic intervals permits the recognition of: Orbitoides medius– Lepidorbitoides minor Assemblage Zone. Planktonic and benthonic zones were correlated with other zonal schemes in and outside Iraq. The studied section is appeared within late Campanian age. Key words: Bekhme Formation, Late Campanian, Planktonic Foraminifera, Zone.