Ground penetrating radar study of dry aeolian environment

Bano, Maksim; Duringer, Ph.; Ghienne, Jean‐François; Schuster, Mathieu

doi:10.1190/1.1821088

Cited by 5 publications

(5 citation statements)

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“…Abrupt and contrasting differences in density, grain size, and moisture contents produce high amplitude reflections (Schenk et al, 1993;Harari, 1996). In general, reflections from the interior of eolian dunes are produced principally by changes in moisture contents (Schenk et al, 1993;Bano et al, 1999;Bristow et al, 2000).…”

Section: Resultsmentioning

confidence: 99%

Hydropedological investigations with ground-penetrating radar (GPR): Estimating water-table depths and local ground-water flow pattern in areas of coarse-textured soils

Jenkinson²,

et al. 2006

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Section: Resultsmentioning

confidence: 99%

Hydropedological investigations with ground-penetrating radar (GPR): Estimating water-table depths and local ground-water flow pattern in areas of coarse-textured soils

Jenkinson²,

et al. 2006

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“…The sedimentary deposits of the four major fossiliferous areas (Toros-Menalla, Kossom Bougoudi, Kollé, Koro-Toro) offer unique insights into the Mio-Pliocene paleoenvironments of the northern Chad Basin. Emerging out of the modern eolian cover, the outcrops consist of large surfaces and small hillocks that were completed by hand-made excavations and locally completed by light geophysical near-surface prospecting with a Ground Penetrating Radar (PulsEKKO 1000 by Sensors & Software) [1,25]. Fig.…”

Section: Sedimentary Geology Of the Mio-pliocene Stratamentioning

confidence: 99%

Chad Basin: Paleoenvironments of the Sahara since the Late Miocene

Schuster

Duringer

Ghienne

et al. 2009

Comptes Rendus. Géoscience

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Since the mid 1990s, the Mission paléoanthropologique francotchadienne (MPFT) conducts yearly paleontological field investigations of the Miocene-Pliocene of the Chad Basin. This article synthesizes some of the results of the MPFT, with focus on the Chad Basin development during the Neogene. We propose an overview of the depositional paleoenvironments of this part of Africa at different scales of time and space, based on a multidisciplinary approach (sedimentary geology, geomorphology, geophysic, numerical simulations and geochronology). The Miocene-Pliocene paleoenvironments are examined through the sedimentary archives of the early hominids levels and the Holocene Lake Mega-Chad episode illustrates the last major paleoenvironmental change in this area. The sedimentary record of the Chad Basin since the Late Miocene can be schematized as the result of recurrent interactions from lake to desert environments. To cite this article: M. Schuster et al., C. R. Geoscience 341 (2009). # 2009 Published by Elsevier Masson SAS on behalf of Académie des sciences. RésuméBassin du Tchad : paléoenvironnements du Sahara depuis le Miocène supérieur. Depuis le milieu des années 1990, la Mission paléoanthropologique francotchadienne (MPFT) conduit chaque année des recherches paléontologiques de terrain dans le Mio-Pliocène du Bassin du Tchad. Cet article synthétise certains résultats de la MPFT concernant l'évolution du Bassin du Tchad au Néogène. Nous proposons un aperçu des paléoenvironnements de dépôt de cette partie de l'Afrique, à différentes échelles, à partir d'une approche multidisciplinaire (géologie sédimentaire, géomorphologie, géophysique, simulations numériques et géochronologie). Les paléoenvironnements du Mio-Pliocène ont été étudiés, notamment à partir des archives sédimentaires des séries à hominidés anciens, et le Lac Méga-Tchad holocène illustre le dernier changement paléoenvironnemental majeur dans cette région.

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“…The first example is a GPR profile collected over an aeolian dry dune in the Chadian desert (Bano et al, 1999). The goal of this survey was to image the interior and the base of the dunes to better understand the sedimentological processes.…”

Section: The Chad Dunesmentioning

confidence: 99%

Topographic migration of GPR data: Examples from Chad and Mongolia

Dujardin

Bano

2013

Comptes Rendus. Géoscience

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Most Ground Penetrating Radar (GPR) measurements are performed on nearly flat areas. If strongly dipping reflections and/or diffractions are present in the GPR data, a classical migration processing step is needed in order to determine the geometries of shallow structures. Nevertheless, a standard migration routine is not suitable for GPR data collected on areas showing a variable and large topographic relief. To account for the topographic variations, the GPR data are, in general, corrected by applying static shifts instead of using an appropriate topographic migration which would place the reflectors at their correct locations with the right dip angle. In this article we present an overview of Kirchhoff's migration and show the importance of topographic migration in the case where the depth of the target structures is of the same order as the relief variations. Examples of synthetic and real GPR data are shown to illustrate the efficiency of the topographic migration.

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Ground penetrating radar study of dry aeolian environment

Cited by 5 publications

References 0 publications

Hydropedological investigations with ground-penetrating radar (GPR): Estimating water-table depths and local ground-water flow pattern in areas of coarse-textured soils

Hydropedological investigations with ground-penetrating radar (GPR): Estimating water-table depths and local ground-water flow pattern in areas of coarse-textured soils

Chad Basin: Paleoenvironments of the Sahara since the Late Miocene

Topographic migration of GPR data: Examples from Chad and Mongolia

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