Tanja Kuhnt
Leipzig University
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Publication
Featured researches published by Tanja Kuhnt.
Journal of Micropalaeontology | 2011
Oliver Friedrich; Silke Voigt; Tanja Kuhnt; Mirjam C Koch
Published proxy data for Oceanic Anoxic Event 2 (OAE 2 or Cenomanian–Turonian Boundary Event) and other mid-Cretaceous OAEs indicate widespread anoxic bottom-water conditions. However, increasing evidence shows that anoxia was not permanent but subject to significant fluctuations. We have generated X-ray fluorescence elemental concentration and benthic foraminiferal assemblage records for a short section of OAE 2 black shales from Wunstorf, northern Germany. Two intervals of low sulphur elemental concentration are interpreted as periods of increased oxygenation of bottom waters. This is supported by benthic foraminiferal assemblage data showing repopulation events associated with these intervals. These repopulation events are characterized mainly by the occurrence of agglutinated taxa, with Lingulogavelinella globosa being the only abundant calcareous species. This observation is interpreted in terms of short-term interruptions of the otherwise anoxic bottom-water environment. Comparison with repopulation events during OAE 1b and Quaternary sapropels make it reasonable to speculate that short-term cooling and an associated increase in bottom-water ventilation at the NW European shelf sea are the main trigger mechanisms for the observed repopulation events at Wunstorf. As source area for benthic foraminifera, shallower parts of the Lower Saxony basin are proposed. Supplementary material: XRF elemental concentrations and benthic foraminiferal counts, are available at: http://www.geolsoc.org.uk/SUP18496
Marine Geology | 2008
Yvonne Hamann; Werner Ehrmann; Gerhard Schmiedl; Stefan Krüger; Jan-Berend W Stuut; Tanja Kuhnt
Palaeogeography, Palaeoclimatology, Palaeoecology | 2007
Werner Ehrmann; Gerhard Schmiedl; Yvonne Hamann; Tanja Kuhnt; Christoph Hemleben; Wolfgang Siebel
Quaternary Science Reviews | 2010
Gerhard Schmiedl; Tanja Kuhnt; Werner Ehrmann; Kay-Christian Emeis; Yvonne Hamann; Ulrich Kotthoff; Peter Dulski; Joerg Pross
Marine Micropaleontology | 2007
Tanja Kuhnt; Gerhard Schmiedl; Werner Ehrmann; Yvonne Hamann; Christoph Hemleben
Quaternary Research | 2009
Yvonne Hamann; Werner Ehrmann; Gerhard Schmiedl; Tanja Kuhnt
Palaeogeography, Palaeoclimatology, Palaeoecology | 2008
Tanja Kuhnt; Gerhard Schmiedl; Werner Ehrmann; Yvonne Hamann; Nils Andersen
International Journal of Earth Sciences | 2007
Werner Ehrmann; Gerhard Schmiedl; Yvonne Hamann; Tanja Kuhnt
EPIC3Deep-Sea Research Part I-Oceanographic Research Papers, PERGAMON-ELSEVIER SCIENCE LTD, 76, pp. 85-95, ISSN: 0967-0637 | 2013
Tanja Kuhnt; Oliver Friedrich; Gerhard Schmiedl; Yvonne Milker; Andreas Mackensen; Andreas Lückge
Archive | 2009
Yvonne Hamann; Werner Ehrmann; Gerhard Schmiedl; Tanja Kuhnt