Phanerozoic geodynamic evolution of northeastern Africa and the northwestern Arabian platform

Guiraud, René; Bosworth, William

doi:10.1016/s0040-1951(99)00293-0

Cited by 264 publications

(114 citation statements)

References 83 publications

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“…Lineaments extracted from remote sensing data are matching trends of tectonic zones mapped in Keely (1994) and Guiraud and Bosworth (1999) with Figure 6. Morpho-tectonic lineaments extracted from DEM using the proposed methods (black and red lines) and the five major tectonic lineaments and faults mapped by Keely (1994) and Guiraud and Bosworth (1999) (a), and the Egyptian Geological Survey and Mining Authority (1981) (b) are draped over shaded relief map. To view this figure in colour, please see the online version of the journal.…”

Section: Validationsupporting

confidence: 54%

“…Overlain of lineaments extracted from remote sensing data (figures 4 and 5), faults mapped by the Egyptian Geological Survey and Mining Authority (1981), and major tectonic zones mapped by Keely (1994) and Guiraud and Bosworth (1999) are shown in figure 6. Lineaments extracted from remote sensing data are matching trends of tectonic zones mapped in Keely (1994) and Guiraud and Bosworth (1999) with Figure 6.…”

Section: Validationmentioning

confidence: 99%

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Mapping of tecto-lineaments and investigate their association with earthquakes in Egypt: a hybrid approach using remote sensing data

Elmahdy

Mohamed

2015

Geomatics, Natural Hazards and Risk

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This study integrates quantitative methods to detect surface and near-surface geological linear structures from digital elevation model. A set of altitude, slope and shaded relief maps was enhanced by applying Sobel filter with 10% threshold and percentile stretch to detect geological fractures and their displacements over regional scale. Topographic fabric grain algorithm, which classifies point lines into the ridge/valley and quantifies the degree to which all the ridges and valleys are aligned in the same direction, was used to auto-detect lineaments. About 1300 linear features were computed and their orientations were statistically analysed using rose diagrams. The enhanced morphometric maps successfully visualized fault zones and their displacements and detected the regional fault zones cutting across the entire Egypt. Their trends were found to be in the NEÀSW, NNEÀSSW, NWÀSE, NNWÀSSE, NÀS, EÀW and WNWÀESE directions. The results obtained using the integrated methods were compared with those in geological and seismic maps of Egypt and showed strong agreement in several places. This proposed method may be useful for mapping concealed geological structures, where geophysical surveying is difficult and geological information not available.

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Section: Validationsupporting

confidence: 54%

Section: Validationmentioning

confidence: 99%

Mapping of tecto-lineaments and investigate their association with earthquakes in Egypt: a hybrid approach using remote sensing data

Elmahdy

Mohamed

2015

Geomatics, Natural Hazards and Risk

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“…The Permian-Triassic boundary lies within the Beaufort Group there. The Lower Triassic Disconformity is documented in western and northeastern Africa Guiraud and Bosworth, 1999;, but it is not evident in Arabia (Sharland et al, 2001) as already mentioned above.…”

Section: Tracing the Triassic Disconformities Within Gondwanamentioning

confidence: 94%

Triassic synthems of southern South America (southwestern Gondwana) and the Western Caucasus (the northern Neotethys), and global tracing of their boundaries

Ruban

Zerfass

Pugatchev

2009

Journal of South American Earth Sciences

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“…In Arabia, the later phases are much better studied because they host the majority of the discovered hydrocarbons (Guiraud and Bosworth, 1999).…”

Section: Arabiamentioning

confidence: 99%

“…These broad, uniform, basins are not easily explained by either rifting or lithospheric flexure . Holt et al (2010) studied the Ghadames and Kufra basins, North Africa, and suggested that their Palaeozoic subsidence was a consequence of the formational properties of the region's Neoproterozoic accretionary crust (Bumby and Guiraud, 2005;Caby and Monié, 2003;Guiraud and Bosworth, 1999). Such crust inherits the thin mantle lithosphere of many of its constituent building blocks (island arcs, accretionary wedges and young oceanic crust), and as this cools and thickens following tectonic assembly it causes subsidence as an isostatic response.…”

Section: Introductionmentioning

confidence: 99%

Basin formation by thermal subsidence of accretionary orogens

2015

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Additional information:Use policyThe full-text may be used and/or reproduced, and given to third parties in any format or medium, without prior permission or charge, for personal research or study, educational, or not-for-pro t purposes provided that:• a full bibliographic reference is made to the original source • a link is made to the metadata record in DRO • the full-text is not changed in any way The full-text must not be sold in any format or medium without the formal permission of the copyright holders.Please consult the full DRO policy for further details. Response to referees of Holt et al.We thank the three referees for their extremely helpful comments on the submitted paper, and appreciate the time that must have been needed. We have paid close attention to their suggestions, and feel that the revised paper greatly benefits from the constructive criticism. We take each referee's comments in turn, below, and offer a point-by-point account of how we have addressed them in the revised version. Our responses are preceded by the # symbol and are in italics.1. Five basins were chosen for the analysis. Why were these basins chosen? The main goal of this paper is to show that a lithosphere cooling model is a fundamental process in accretionary orogens. Therefore, the choice of the case studies needs to be carefully justified to show that these are 'typical' basins (i.e., there are no special conditions that could lead to a subsidence pattern similar to that of the cooling model). This is done in places in the manuscript, but it should be more explicit. At the moment, it isn't clear if the five basins are representative of accretionary orogens or if they were chosen because they fit the cooling model. 2. The cooling model is only vaguely described and no quantitative details are provided. Perhaps there should be a separate section with a conceptual description of the cooling model -why is it expected that accretionary crust has a thin initial lithosphere, what maintains the thin lithosphere, and what happens to cause the lithosphere to start to cool? It is stated that this model is different from a mantle delamination model (top of pg 4), but the 'alternate' mechanism for creating thin lithosphere is not clearly described. #Text has been added to explain the cooling model in section 2. There is also a longer description of why accretionary crust starts with thin mantle lithosphere in the Introduction. Both of these items were first described in Holt et al (2010): the only reason they were not originally given more length in this paper is that we thought readers would prefer a terse version of the material!In addition, the actual numerical values used in the cooling model need to be given. Readers are referred to the Holt et al. (2010) paper, but it isn't clear how this method was applied to the current study. For example: Do all regions start with a 20 km thick mantle lithosphere or does this vary (as implied on pg 15, line ~18: "an unusually thin initial lithosphere…is required")? How was crustal thickness var...

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Phanerozoic geodynamic evolution of northeastern Africa and the northwestern Arabian platform

Cited by 264 publications

References 83 publications

Mapping of tecto-lineaments and investigate their association with earthquakes in Egypt: a hybrid approach using remote sensing data

Mapping of tecto-lineaments and investigate their association with earthquakes in Egypt: a hybrid approach using remote sensing data

Triassic synthems of southern South America (southwestern Gondwana) and the Western Caucasus (the northern Neotethys), and global tracing of their boundaries

Basin formation by thermal subsidence of accretionary orogens

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