A comparative study between the depositional environment and provenance of the Hussainiyat (Lower Jurassic) and the Rutbah (Upper Cretaceous) Formations, Western Desert of Iraq

2016 ◽  
Vol 9 (6) ◽  
Author(s):  
Mazin Y. Tamar-Agha ◽  
Aqeel A. Al-Zubaidi ◽  
Safa’a A. Al-Janabi
Keyword(s):  
Comparative Study ◽  
Depositional Environment ◽  
Upper Cretaceous ◽  
Lower Jurassic ◽  
Western Desert ◽  
Western Desert Of Iraq

scholarly journals Ground Radiometric Method as a Tool for Determining the Surface Boundary of a Buried Bauxitic Karst

2011 ◽  
Vol 16 ◽  
pp. 57
Author(s):  
Kamal Kareem Ali ◽  
Salih Muhammad Awadh ◽  
Jassim Muhammad Hemad
Keyword(s):  
Chemical Weathering ◽  
Gamma Ray ◽  
Surface Soil ◽  
Total Radioactivity ◽  
Lower Jurassic ◽  
Radiometric Method ◽  
Western Desert ◽  
Surface Boundary ◽  
Gamma Ray Spectrometer ◽  
Western Desert Of Iraq

Forty two ground radiometric measurements along nine traverses within a rectangular network area were taken across a bauxitic karst within the Ubaid Formation (Lower Jurassic) in the Western Desert of Iraq. A 4-Channel Gamma Ray Spectrometer (GAD-6) with sodium iodide NaI (Tl) crystal (GSP-4S) was used in the field to measure the total radioactivity of the surface soil. Soil samples collected from the surface at each measurement point and core samples collected from a test well penetrating the karst were analyzed by Gamma ray spectrometer. The main objective of this study was to detect the hidden bauxitic karst and determine its surface boundary. The radioactivity on the surface of the karst was ranging between 60 and 80 count per second (c/s), while the background radioactivity of the Ubaid Formation, which hosts the karst, was ranging between 100 and150 c/s. Chemical weathering, especially dissolution and leaching moved uranium (238U) and thorium(232Th) from the overburden downward. Accordingly, these elements have been adsorbed on the surface of clay minerals and bauxite buried at a depth of about 5m causing enrichment with radioactivity. The leached overburden lack radioelements, so its radioactivity was less than background radioactivity level. The gamma ray spectroanalysis showed that the radioactivity of 238U and 232Th in the overburden was 0.5 and 3 Bq/Kg, whereas, in the bauxite and flint clay bed, it was 240 and 160 Bq/Kg respectively. Based on the radioactivity anomaly contrast on the surface, an isorad map was plotted and the karst diameter which represents low anomaly was determined to be ranging from 150 to 200m. The current study demonstrates that the ground radiometric method is quite useful for detecting the bauxitic karst and inferring its surface boundaries.  

scholarly journals Vertebrate paleontological exploration of the Upper Cretaceous succession in the Dakhla and Kharga Oases, Western Desert, Egypt

2016 ◽  
Vol 117 ◽  
pp. 223-234 ◽  
Author(s):  
Hesham M. Sallam ◽  
Patrick M. O'Connor ◽  
Mahmoud Kora ◽  
Joseph J.W. Sertich ◽  
Erik R. Seiffert ◽  
...  
Keyword(s):  
Upper Cretaceous ◽  
Western Desert

scholarly journals Minimizing the Impacts of Desertification in an Arid Region: A Case Study of the West Desert of Iraq

2021 ◽  
Vol 2021 ◽  
pp. 1-12
Author(s):  
Khamis Naba Sayl ◽  
Sadeq Oleiwi Sulaiman ◽  
Ammar Hatem Kamel ◽  
Nur Shazwani Muhammad ◽  
Jazuri Abdullah ◽  
...  
Keyword(s):  
Land Degradation ◽  
Vegetation Index ◽  
Rainwater Harvesting ◽  
Large Change ◽  
Cost Effective ◽  
Western Desert ◽  
Gis Environment ◽  
Small Change ◽  
Western Desert Of Iraq ◽  
Suitable Land

Currently, desertification is a major problem in the western desert of Iraq. The harsh nature, remoteness, and size of the desert make it difficult and expensive to monitor and mitigate desertification. Therefore, this study proposed a comprehensive and cost-effective method, via the integration of geographic information systems (GISs) and remote sensing (RS) techniques to estimate the potential risk of desertification, to identify the most vulnerable areas and determine the most appropriate sites for rainwater conservation. Two indices, namely, the Normalized Differential Vegetation Index (NDVI) and Land Degradation Index (LDI), were used for a cadastral assessment of land degradation. The findings of the combined rainwater harvesting appropriateness map, and the maps of NDVI and LDI changes found that 65% of highly suitable land for rainwater harvesting lies in the large change and 35% lies in the small change of NDVI, and 85% of highly suitable land lies in areas with a moderate change and 12% lies in strong change of LDI. The adoption of the weighted linear combination (WLC) and Boolean methods within the GIS environment, and the analysis of NDVI with LDI changes can allow hydrologists, decision-makers, and planners to quickly determine and minimize the risk of desertification and to prioritize the determination of suitable sites for rainwater harvesting.

A revision of the Upper Cretaceous lepidosirenid lungfishes from the Quseir Formation, Western Desert, central Egypt

2014 ◽  
Vol 34 (4) ◽  
pp. 760-766 ◽  
Author(s):  
Kerin M. Claeson ◽  
Hesham M. Sallam ◽  
Patrick M. O’Connor ◽  
Joseph J. W. Sertich
Keyword(s):  
Upper Cretaceous ◽  
Western Desert
Sign in / Sign up

Export Citation Format

Share Document