Al NEELAIN JOURNAL OF GEOSCIENCES - VOL : 01 - ISSUE - 02

Permanent URI for this collectionhttps://repository.neelain.edu.sd/handle/123456789/11374

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Author: search.filters.author.Khalid M. Kheiralla

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    Depth Estimation of the Magnetic Sources in Muglad Rift Basin Using 3D Analysis of High-Resolution Aeromagnetic Data
    (جامعة النيلين, 2017) Khalid M. Kheiralla
    Abstract The integrated approach, using multi-source geophysical data in order to constrain the 3D geometry and the structure of the Muglad Basin in Sudan. Muglad Basin has a huge potential for oil exploration. In the Garaad area, very near-surface basic igneous sills/flows lies within the sedimentary sections. The presences of these sub-surfaces volcanics avert exploration by usual geophysical surveys and might have degraded potential hydrocarbons. Aircraft “high-resolution magnetic gradient” surveyed to provides a good indication of the distribution and relative depths of near-surface volcanics in the study area. One of the main objectives of the interpretation was to map the distribution of the volcanics, with particular emphasis on identifying areas of very near surface and relatively thick units. Interpretation of the magnetic data in the Garaad area has produced a thematic map of the distribution of volcanics useful for the planning of future drilling. Local wavenumber, horizontal and vertical derivatives, analytic signal, 3D Euler deconvolutions and convolution filtering provide a characterization of structural domains and allow us to estimate the depths of the magnetic sources. Using Convolution filtering out the lineament analyses two main structural directions is mapped in the study area with combined these results from gravimetric anomalies analysis, Landsat data processing and quantitative DEM analysis in order to generate precise structural maps of the basin. The structural content of surface data (DEM and remote sensing data) combined with 3D geophysical modelling allowed us to produce a very precise model of the geometry and structure of the basin, prerequisite for the exploitation of potential oil reservoirs.
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    Genesis of Soils from Mafic and Ultramafic Rocks in Southeast Ingassana Hills Complex, Blue Nile State, Sudan
    (جامعة النيلين, 2017) Siddig M. Elzien; Eman K.D. Sayed; Omar A.O. Al-Imam; Hamed B.O. Hamed; Mohammed A.H. Altigani; Khalid M. Kheiralla
    Abstract Ingassana Hills Complex composed of greatly weathered rocks forming clays and laterite. Chemical analyses show a depletion of high soluble elements such as Si4+, K+, Na+, Ca2+, Mg2+, Fe2+ etc., and enrichment of Al3+, Fe3+, Ti4+, H2O+ etc., in their weathering products . Silica, potassium and others, beside the formation of economic mineral deposits like gold, pyrite, and chalcopyrite were present within the shear zone in the area. Soil profiles have shown gain of ferric iron, titanium and alumina and other most resistant elements on progressive weathering. The meager light minerals are quartz and feldspar and the magnetic and nonmagnetic are distributed in different percentages such as chromite (20%-75%), galena (9%-70%), pyrite (10%-20%), hematite (10%-40%), copper (5%-20%) associated with zircon, gold, chalcopyrite, tourmaline, cinnabar and talc.