{"refrec":{"BRefID":57242,"RR":"<b>Maenhaut van Lemberge, V.</b> (1993). Southern North Sea Project Borehole BH 89/1: a technical report. <i>Bull. Belg. Ver. Geologie = Bull. Soc. Belg. Geol. 101 (1992)(3-4)</i>: 277-301","BEntID":54822,"PublicFlag":1,"CheckedFlag":0,"wosflag":null,"vabbflag":null,"RefStringPartII":". <i>Bull. Belg. Ver. Geologie = Bull. Soc. Belg. Geol. 101 (1992)(3-4)</i>: 277-301","DocTypID":8,"DocType":"Journal article","MarineFlag":1,"FreshFlag":0,"BrackishFlag":0,"TerrestrialFlag":0,"Authorstring":"Maenhaut van Lemberge, V.","OrigTitleTranslFlag":0,"Authorstringtrunc":"Maenhaut van Lemberge, V.","Englishabstract":"The EEC 'Southern North Sea Project - Quaternary Geology' was carried out between 1989 and 1991. The project included geologists from the Geological Surveys of five countries : the Netherlands, Great-Britain, Germany, Denmark and Belgium. The major goal of the project was to study and to reconstruct the development of the Southern North Sea Basin during the Quaternary .To this end 9 boreholes were drilled in the Southern North Sea. These were complemented by a seismic survey, connecting most of the boreholes. A complete report is given here of the different investigations which were carried out on the Belgian core, BH 89/1, situated in the north-eastern part of the Belgian Continental Shelf. The investigations include the geographical and geological setting of the Belgian borehole, the lithological and sedimentological analysis of the core and the determination of the heavy minerals, of the isothermal remanent magnetization of the magnetic minerals and of the clay mineral composition. Furthermore different samples were analysed for their dinoflagellate and foraminiferal content. The age of organic fragments found in a sample was determined using C14-dating. The sequences in the borehole were related to seismo-stratigraphic units identified on available seismic lines from this part of the Belgian Sector. On the basis of the obtained data, the following conclusions could be drawn. The Tertiary deposits belong to the Lower Eocene (Gent Formation, leper Group ). They were deposited in a shallow marine environment. These deposits are covered by Quaternary sediments which fill a valley-like depression scoured in Tertiary deposits. The lower Quaternary sequence consists of probably reworked marine sands, deposited by a fluvial or fluvio-periglacial system during the Weichselian. This sequence is related to or might belong to the Kreftenheye Formation. The upper Quaternary sequence has a Holocene age and consists of the active seabed sediments. This sequence corresponds with the Bligh Bank Formation.","AbstractOtherLang":"Het EEG-projekt 'Southern North Sea Project -Quaternary Geology' werd uitgevoerd tussen 1989 en 1991. Het bundelde de krachten van de Geologische Diensten van vijf landen: Nederland, Groot-Brittannië, Duitsland, Denemarken en België. Doel was de ontwikkeling van het Zuidelijke Noordzeebekken gedurende het Kwartair te bestuderen en te reconstrueren. Hiertoe werden 9 boringen uitgevoerd. Dit werd aangevuld door een seismische campagne in de Zuidelijke Noordzee die de meeste boringen met elkaar verbindt. Een volledig verslag van de analyses die werden uitgevoerd op de Belgische boring, BH 89/1, gelegen in het noordoostelijk deel van het Belgisch Continentaal Plat, wordt hier weergegeven. De analyse omvat een geografische en geologische situering van de Belgische boring, de lithologische en sedimentologische analyse van de boorkern en het bepalen van de zware mineralen, van de isothermale remanente magnetisatie van de magnetische mineralen en van de kleimineralen. Verder werden verscheidene monsters onderzocht voor dinoflagellaten en foraminiferen. De ouderdom van organische resten aangetroffen in een monster werd bepaald door middel van C14-datering. De sequenties aangetroffen in de boring werden gecorreleerd met seismisch-stratigrafische eenheden die onderscheiden kunnen worden op beschikbare seismische lijnen afkomstig van dit gedeelte van de Belgische sector. Op basis van de bekomen gegevens kan men tot volgende conclusies komen. De tertiaire afzettingen behoren tot het Onder Eoceen (Formatie van Gent, leper Groep ). Ze werden afgezet in een ondiep marien milieu. Deze afzettingen worden bedekt door kwartaire sedimenten die een valleiachtige depressie opvullen. Deze is uitgeschuurd in de tertiaire afzettingen. De onderste kwartiare sequentie bestaat uit waarschijnlijk herwerkte mariene zanden, afgezet door een fluviatiel of fluvio-periglaciair systeem gedurende het Weichsel. Deze sequentie is geassocieerd met of behoort tot de Kreftenheye Formatie. De bovenste kwartiare sekwentie is van holocene ouderdom en omvat de huidige zeebodem afzettingen. Deze sequentie komt overeen met de Bligh Bank Formatie.","BibLvlCode":"AS","StandardTitle":"Southern North Sea Project Borehole BH 89/1: a technical report","OrigTitleLangCode":"en","OrigTitleLangCodeExtended":"eng","OrigTitleLangID":15,"DateLastModified":{"date":"2025-07-02 08:33:14.980000","timezone_type":1,"timezone":"+00:00"},"UserAccessRight":null,"UserAccID":null,"AuthorKeywords":null,"OtherDescriptors":"Quaternary deposits","Notes":null,"AnaPub":1993,"MonPub":null,"DateUpdate":"2016-03-16","DateCreate":"2004-02-09","SecASFANote":null,"ConfID":null,"PeerRev":0,"VlizCoreFlag":1,"WoScode":null,"VABBcode":null,"OpenAcc":1},"refs":null,"anarec":{"AnaID":57242,"PubliDate":1993,"Pagination":"277-301","XtraPublOfAnaID":null,"ISBN":null,"Volume":"101 (1992)","Issue":"3-4","BRefMon":null,"BRefMonRR":null,"BRefXtra":null,"BRefXtraRR":null,"SerBRefID":45020,"SerRR":"Bulletin van de Belgische Vereniging voor Geologie = Bulletin de la Société Belge de Géologie. 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