Christian Dupuis

Christian Dupuis
Université de Mons

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76
Publications
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Publications

Publications (76)
Article
Danian (lower Paleocene) sequences in north-central Tunisia are dominantly composed of marls and shales but a conspicuous, indurated glauconite-bearing marker bed is associated with the P3a–P3b transition. This glauconite bed is considered to correlate with the Latest Danian Event (LDE) described from the Nile Basin in Egypt, with the 'top Chron C2...
Article
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We describe a small collection of ammonites from the Dababiya Quarry corehole. It is almost entirely composed of heteromorph ammonites, in particular of scaphitids and baculitids. The presence of Indoscaphites pavana (Forbes 1848), which is for the first time reported from Egypt, points to a late to possibly latest Maastrichtian age for the interva...
Article
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The Dababiya corehole was drilled in the Dababiya Quarry (Upper Nile Valley, Egypt), adjacent to the GSSP for the Paleocene/ Eocene boundary, to a total depth of 140 m and bottomed in the lower Maastrichtian Globotruncana aegyptiaca Zone of the Dakhla Shale Formation. Preliminary integrated studies on calcareous plankton (foraminifera, nannoplankto...
Article
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The global stratotype sections and points for the bases of the Selandian (Middle Paleocene) and Thanetian (Upper Paleocene) stages have been defined in the coastal cliff along the Itzurun Beach at the town of Zumaia in the Basque Country, northern Spain. In the hemipelagic section exposed at Zumaia the base of the Selandian Stage has been placed at...
Article
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The desertic Theban hills between the edge of the alluvial plain of the Nile River and the prominent cliffs at the eastern edge of the Theban Plateau consist of imbricated tilted blocks organized in parallel groups representing successive generations of gravitational collapse structures (or slumps). The older (distal) generations correspond to low,...
Conference Paper
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PART 1: THE DABABIYA QUARRY OUTCROP The GSSP for the base of the Eocene Series is located at 1.58 m above the base of Section DBH in the Dababiya Quarry, on the east bank of the Nile River, about 35 km south of Luxor, Egypt. It is the base of Bed 1 of the Dababyia Quarry Beds of the El Mahmiya Member of the Esna Formation, interpreted as having re...
Article
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We present a review of archeological and geological studies on the West Bank as a basis for discussing the geological setting of the tombs and geologically related problems with a view to providing archeologists with a framework in which to conduct their investigations on the restoration, preservation and management of the antique monuments. Wherea...
Article
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In order to unravel faunal and paleoenvironmental parameters in shallow marine settings prior to the Paleocene- Eocene thermal maximum, we investigated the Sidi Nasseur section (NAS) in Central Tunisia. This section exposes Paleocene to lower Eocene shales and marls of the El Haria Formation. The uppermost Paleocene part of the Sidi Nasseur section...
Article
Full-text available
GSSP for the base of the Eocene Series is located at 1.58 m above the base of Section DBH in the Dababiya Quarry, on the east bank of the Nile River, about 35 km south of Luxor, Egypt. It is the base of Bed 1 of the Dababyia Quarry Beds of the El Mahmiya Member of the Esna Formation, interpreted as having recorded the basal inflection of the carbon...
Article
Full-text available
The GSSP for the base of the Eocene Series is located at 1.58 m above the base of Section DRH in the Dababiya Quarry, on the east bank of the Nile River, about 35 km south of Luxor, Egypt. It is the base of Bed 1 of the Dababyia Quarry Beds of the El Mahmiya Member of the Esna Formation, interpreted as having recorded the basal inflection of the ca...
Article
Full-text available
The Paleocene-Eocene boundary is defined chemostratigraphically by the onset of a 100 kyr global carbon isotope excursion (CIE) that is recognized in marine and continental strata in both carbonate and dispersed organic carbon. The CIE is important in continental sections as a proxy for environmental change during the Paleocene-Eocene thermal maxim...
Article
A taphocenosis with internal fossil diatom molds were retrieved from the Upper Palaeocene-Lower Eocene sediments of Ølst and Albaekhoved (Denmark). Energy-dispersive X-ray microanalyses show that barium, sulphur, oxygen and sometimes strontium are the major chemical elements composing these diatom molds. According to the elemental compositions, the...
Article
This paper presents the results of a biostratigraphic analysis of pyritized diatom assemblages in the Saint-Josse core (CC82) located in the northern part of the Paris basin (coordinates: X=555 000, Y=307 324 and Z=56.9 m). During the Paleocene-Eocene this locality was situated in a small bight of the North Sea Basin. The results are obtained from...
Article
Natural stones used in monuments have to deal sooner or later with weathering. The desire to preserve cultural heritage created a wide variety of products to reduce the rate of stone decay and to strengthen decayed stone. The ability of these water repellents and consolidants to penetrate inside natural building stones is one of the main factors co...
Article
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Assemblages of brackish and marine diatoms have been examined from Upper Paleocene-Lower Eocene strata of the Belgian Basin (Knokke well) and the Dieppe-Hampshire Basin (Saint-Josse borehole and Ailly sections). The diatoms observed are invariably preserved in pyrite as internal moulds and their siliceous skeletons are completely replaced by pyrite...
Article
Ammonites are described for the first time from the terminal Maastrichtian in the Cretaceous-Paleogene (K/P) Global Stratotype Section and Point at El Kef, Tunisia. A rich assemblage, consisting of at least 17 taxa, occurs in the interval from 7 to 2 m below the K/P boundary. They co-occur with a diverse macrofauna, which also includes rudists. All...
Article
Assemblages of brackish and marine pyritized diatoms have been examined from Thanetian and Ypresian sediments in the Dieppe–Hampshire Basin. Two sites were studied: the borehole of Saint-Josse and sections at Ailly, both located in northern France. Pyritized diatoms are preserved in the deposits by epigenesis or as internal moulds by the growth of...
Article
Assemblages of brackish and marine diatoms have been examined from Upper Paleocene-Lower Eocene strata of the Belgian Basin (Knokke well) and the Dieppe-Hampshire Basin (Saint-Josse borehole and Ailly sections). The diatoms observed are invariably preserved in pyrite as internal moulds and their siliceous skeletons are completely replaced by pyrite...
Article
The Aïn Settara section (Kalaat Senan, Central Tunisia) exposes in very good conditions a continuous marl-limestone alternation, going from the Upper Maastrichtian to the Danian. The Cretaceous-Palaeogene boundary is particularly better exposed than it is in the El Kef type section. The studied section reveals, at first, a typical bed-interbed deci...
Article
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Hundreds of silicified standing stumps have been discovered within a lignitic horizon in the middle of the Tienen Formation near Hoegaarden in northeast Belgium. The anatomical features of the fossil stumps, as those of the numerous silicified secondary xylem remains collected since the last century from this area, demonstrate that they all belong...
Article
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The Global Standard Stratotype-section (GSSP) for the Paleocene/Eocene (P/E) boundary has been selected in the Dababiya Quarry, near Luxor, at the base of a lithostratigraphic unit where the base of the so-called Carbon Isotope Excursion (CIE) is re-corded. The Dababiya Quarry offers remarkable three-dimensional exposures of the Upper Paleocene-Low...
Article
A paleomagnetic study of the Paleocene-Eocene Esna Shale and Tarawan Chalk at the Dababiya and Qreiya sections near Luxor in central Egypt reveals stable normal and reverse polarity magnetizations. However, these (neritic) pelagic marine sediments have evidently been remagnetized because 1) the stable magnetizations are carried by hematite with no...
Article
Full-text available
The choice of a Paleocene/Eocene (P/E) Global Standard Stratotype-section and Point (GSSP) is complicated by the fact that there exists confusion on the exact denotation of the Paleocene and Eocene Series and their constituent lower rank (stage) units. While we can now resolve this problem by recourse to rigorous historical analysis, actual placeme...
Patent
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The establishment of the Working Group on the Paleocene/Eocene boundary at the 28th International Geological Congress (Washington, 1989) was serendipitously coincidental with the report of significant, stratigraphically linked events in the biotic and isotopic record of Magnetic Chron C24 in the early Paleogene record of the Southern Ocean, obtaine...
Article
The borehole of Saint-Josse and the Cap d'Ailly section, both situated in the Paris Basin and belonging to the Palacocene-Eocene interval, are studied. Pyritized diatoms are found in both sites; often well preserved by epigenesis in the Saint-Josse borehole and most often preserved as internal mould of pyrite in the Cap d'Ailly section. A part of «...
Article
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The Cretaceous-Palaeogene (K/P) boundary, until recently known as the "Cretaceous-Tertiary" or K/T boundary, is well exposed at Aïn Settara in the Kalaat Senan area (Central Tunisia), 50 km south of the El Kef section. Micropalaeontological and geochemical studies led to the identification of six main features tentatively named "events", which char...
Article
The Ain Settara section (Kalaat-Senan area. Tunisia) shows a well-exposed and expanded Cretaceous/Tertiary (K/T) boundary that can be divided into several units of contrasted lithologies. The bolide impact level is identified thanks to the occurrence of a peak of iridium and Ni-rich spinel abundance. The impact level is a jarosite nodule-rich horiz...
Article
Full-text available
The quantitative study and high resolution sampling of an essentially continuous and expanded Cretaceous/ Paleogene (K/P) boundary section in Tunisia allow us to test the model of extinction in planktic foraminifera. The extinction at the Aïn Settara section occurred over a short period of time similar to the Tunisian sections at El Kef and Elles a...
Article
Full-text available
Planktic foraminiferal biostratigraphy and assemblage turnover across the Cretaceous/Paleogene (K/P) boundary at El Kef revealed the largest and most abrupt extinction event in the history of planktic foraminifera. Cretaceous assemblages were very abundant and diverse and included 67 stable identified species within the terminal Maastrichtian. The...
Article
Full-text available
Tertiary weathered sediments located immediately to the west of the harbor at Newhaven, Sussex, UK, were investigated by examination of major and trace elements by scanning electron micro-scope (SEM), microprobe, and inductively coupled plasma mass spectrometer (ICP-MS), and the min-eralogy was studied by optical petrography, X-ray diffraction (XRD...
Article
Local variations in spinel compositions are observed at the K/T boundary in Tunisia, consistent with the idea of a long range dispersion of impact debris. Their atmospheric reentry might have generated a series of environmental stresses contributing to the K/T crisis.
Article
The so-called 'kaolins de l'Ardenne' were discovered at the beginning of the 20th century, nevertheless our knowledge of their remains incomplete. The Transinne borehole provides a good sample which proves the thickness of this kaolinitic paleoweathering. The thickness appears to be similar to those recognized in several parts of a supposed unique...
Article
The Cenomanian-Turonian section in central Tunisia offers an excellent opportunity to consider the stage boundary events in a basin margin setting. The deposits of the Kalaat Senan section combine a diverse biostratigraphic record with sufficient change in the lithofacies to identify the position of depositional sequences in a detailed stratigraphi...
Article
Fault slip analyses were carried out on Cretaceous to Lower Tertiary formations in the Mons Basin. The results were compared with the four main stages of subsidence. The successive palaeostresses were: 1.(1) a N-S “Wealdian” extension, probably related to karstic dynamics;2.(2) a NW-SE extension during the late Campanian;3.(3) a NE-SW extension dur...
Article
The Meso-Cenozoic subsidence of the Mons basin develops in 4 main steps. The first one depends upon the dissolution of deeply concealed visean anhydrites in an hydrogeological system controlled by the Early Cretaceous low eustatic levels and by the denudation of the Brabant massif. The second one, during the Upper Cretaceous, records the rising of...
Article
The Bohon Cave consists of an almost straight two levels gallery, the Ourthe river running through the lower one. At some places, the upper gallery has been completely filled by a sedimentary sequence including detritic layers and speleothems, sometimes interstratified. The lithostratigraphical study allowed the discovery of stalagmitic floors, the...
Article
The Maastrichtian chalk layers in the Mons basin are characterized by a horst and graben structure associated with E-W dextral strike-slip faults. Paleo-stress tensor reconstructions show that the corresponding sigma 3 axis is horizontal and trends NE-SW. The regional structural pattern is interpreted as a pull-apart basin close to a major dextral...
Article
Study of the quartz thermoluminescence properties of NW European Saalian and Weichselian loessic deposits provides a promising means of loess identification and stratigraphical correlation. On the one hand, the shape diversity of the artificial TL glow curves leads to the definition of distinct loessic provinces. On the other hand, comparison of th...
Article
Along the S coast of Java, the conekarst of the Gunung Sewu constitutes a perfect example of a zonal intertropical karst, between 0 and 500 m above the sea-level. These landforms develop in coralline limestones of the Miocene. Along its N border, rivers flowing on marls cut canyons in the limestone and disappear in shallow holes. They reach the wat...
Article
Theoretical considerations about sampling methods of speleothems are first presented. Analytical results obtained from three parallel borings in a stalagmitic crust are then discussed. The pollen analysis demonstrates that the calcite growth took place between the atlantic and the subatlantic periods, with an interruption during the subboreal perio...
Article
An oxygen isotope study has been carried out on rocks and minerals from the 3 units which comprise the concentric Hercynian pluton of Ploumanac'h (Brittany, France). Lack of extensive low-temperature water/rock interactions enabled 3 non-cogenetic pulses of magma to be identified: (1) an early mantle-derived basaltic magma of alkaline affinity (δl8...
Article
The Maladeta plutonic complex formed during the latest stages of the Variscan orogeny. It was emplaced into the Paleozoic sedimentary sequence of the Pyrenees. The eastern part, investigated in the present study, consists of an early intrusion of cumulate gabbronorites followed in order of emplacement by the main biotite-hornblende granodiorite, wh...
Article
Devismes R., Dupuis Christian, Haesaerts P., De Heinzelin Jean. Fouilles de 1975 a la carriere est du chemin des Salines, Bois-mont, Somme, France. In: Cahiers archeologiques de Picardie, n°4, 1977. pp. 31-42.
Article
EnglishOne of the gravel sheets of the alluvial complex of the "Basse Somme" shows some characteristics which are considered as witness of a marine influence. This gravel sheet, named Croix l'Abbe Formation was deposited about a height of 25 m during a cold climatic episode of the Lower Pleistocene ; relationships with the terraces of the Somme bet...

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