Reprocessing and interpretation of the aeromagnetic data of Algeria

Bournas, Nasreddine; Gacem, Salah; Fairhead, J. D.; Hamoudi, Mohamed; Galdéano, A.

doi:10.1190/1.2792517

Cited by 3 publications

(3 citation statements)

References 5 publications

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“…The World Wind plug-in can be downloaded from: http://www.getech.com/downloads/WDMAM.htm Figure 3: The first version of our global magnetic anomaly grid in Google Earth. The KMZ file can be downloaded from: http://geomag.org/models/wdmam.html further airborne and marine magnetic surveys, such as for Algeria (Bournas et al, 2007). We actively encourage private and public institutions to contribute data to the NGDC public archives and/or the EMAG mapping effort.…”

Section: Discussionmentioning

confidence: 99%

EMAG3: A 3‐arc‐minute resolution global magnetic anomaly grid compiled from satellite, airborne and marine magnetic data

Maus

Fairhead

Mogren

et al. 2008

SEG Technical Program Expanded Abstracts 2008

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NOAA's National Geophysical Data Center (NGDC) has extensive holdings of airborne and marine magnetic data. Such data have been collected for more than half a century, providing global coverage of the Earth. Due to the changing main field from the Earth's core, and due to differences in quality and coverage, combining these data to a consistent global magnetic anomaly grid is challenging. A key ingredient is the long wavelength magnetic field observed by the low-orbiting CHAMP satellite. To produce a homogeneous grid, the marine and aeromagnetic trackline data are first line-leveled and then merged with the existing grids of continental-scale compilations by Least Squares Collocation. In the final processing step the short-to-intermediate wavelengths of the near-surface grid are merged with a CHAMP satellite magnetic anomaly model. In analogy to NGDC's 2-arcminute resolution ETOPO2 grid, we call our initial 3-arcminute magnetic anomaly grid EMAG3. The grid will be updated regularly. It is available in digital form and as plug-ins for NASA World Wind and Google Earth.

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Section: Discussionmentioning

confidence: 99%

EMAG3: A 3‐arc‐minute resolution global magnetic anomaly grid compiled from satellite, airborne and marine magnetic data

Maus

Fairhead

Mogren

et al. 2008

SEG Technical Program Expanded Abstracts 2008

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“…To the west, the Kandi Shear Zone extends north from the Equatorial Atlantic coast line of Benin as a sinistral shear zone into Algeria where it splays out to the NW and NE and forms a major late Palaeozoic to Mesozoic sedimentary basin known as the Saharan platform. The shear zone and the splay structures are clearly defined by regional gravity and aeromagnetic studies, the latter used to indicate that the sediments within the basin extend to 8 km in depth (Bournas et al, 2007; Fairhead et al, 2007). If one restores Africa and South America continents to their pre‐opening position, then the Kandi Shear Zone continues into northern Brazil as the Trans Brazilian Lineament with sinistral displacement.…”

Section: Geological Settingmentioning

confidence: 99%

“…We show that two major rifting events have occurred in the Komombo Basin. By providing a sound understanding of the tectonic evolution of the Cretaceous basins in southern Egypt (Kharit, Nuqra and Komombo within the basin extend to 8 km in depth (Bournas et al, 2007;Fairhead et al, 2007). If one restores Africa and South America continents to their pre-opening position, then the Kandi Shear Zone continues into northern Brazil as the Trans Brazilian Lineament with sinistral displacement.…”

Section: Introductionmentioning

confidence: 99%

Tectonic evolution and subsidence history of the Cretaceous basins in southern Egypt: The Komombo Basin

Ali

Abdelhady³

et al. 2022

Basin Research

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The structure and tectonic evolution of the Cretaceous rift basins of southern Egypt are poorly understood. In this study, the tectonostratigraphy of the Komombo Basin has been determined using seismic, well and biostratigraphic data. The tectonostratigraphy of the basin is compared to the Kharit, Nuqra and Beni Suef basins in Egypt as well as Muglad Basin in Sudan. The Komombo Basin is a 58 km long, 28 km wide NW–SE trending half‐graben infilled with 2200 m of Berriasian‐Maastrichtian sediments and overlain by 400 m of Pliocene sediments. Four Berriasian to Maastrichtian syn‐rift and post‐rift sequences and three Pliocene channel systems of Nile sediments have been identified. Moreover, a series of normal faults, negative flower structures, reverse faults and folds are mapped in the basin. Backstripping reveals two rift phases during the Berriasian‐Barremian and Turonian‐Santonian, respectively. Additionally, the tectonic subsidence curves indicate that two major unconformities have occurred during the Aptian‐Albian and Maastrichtian‐Pliocene, which are correlated with a basement uplift during the Albian‐Cenomanian and the Oligocene‐Miocene flank uplift related to the opening of the Red Sea, respectively. The rift episodes are attributed to far‐field stress changes resulting from the initial opening of the South Atlantic and followed by the NW part of the African plate colliding and anticlockwise rotating into Europe. The highest β factors (1.20–1.11) for both rift phases are found at the centre of the basin. The rift phases thinned the crust from 32.5 to 28.2 km and 31.9 km in the depocenter and the western flank of the basin. The Komombo Basin has a similar rift history, stratigraphy and structural style to the Kharit, Nuqra and Mugland basins. All of these basins witnessed two major rift phases in the Early and Late Cretaceous, whereas the Beni Suef Basin encountered strike‐slip tectonic events in the Late Cretaceous.

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The role of gravity and aeromagnetic data in mapping mega Gondwana crustal lineaments: The Argentina‐Brazil‐Algeria (ABA) lineament

Fairhead

Bournas

Raddadi

2007

SEG Technical Program Expanded Abstracts 2007

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Reprocessing and interpretation of the aeromagnetic data of Algeria

Cited by 3 publications

References 5 publications

EMAG3: A 3‐arc‐minute resolution global magnetic anomaly grid compiled from satellite, airborne and marine magnetic data

EMAG3: A 3‐arc‐minute resolution global magnetic anomaly grid compiled from satellite, airborne and marine magnetic data

Tectonic evolution and subsidence history of the Cretaceous basins in southern Egypt: The Komombo Basin

The role of gravity and aeromagnetic data in mapping mega Gondwana crustal lineaments: The Argentina‐Brazil‐Algeria (ABA) lineament

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