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Evidence for a palaeo-subglacial lake on the Antarctic continental shelf.
Kuhn, Gerhard; Hillenbrand, Claus-Dieter; Kasten, Sabine; Smith, James A; Nitsche, Frank O; Frederichs, Thomas; Wiers, Steffen; Ehrmann, Werner; Klages, Johann P; Mogollón, José M.
Afiliación
  • Kuhn G; Alfred-Wegener-Institut Helmholtz-Zentrum für Polar- und Meeresforschung, Department of Geosciences, 27568 Bremerhaven, Germany.
  • Hillenbrand CD; British Antarctic Survey, High Cross, Madingley Road, Cambridge CB3 0ET, UK.
  • Kasten S; Alfred-Wegener-Institut Helmholtz-Zentrum für Polar- und Meeresforschung, Department of Geosciences, 27568 Bremerhaven, Germany.
  • Smith JA; British Antarctic Survey, High Cross, Madingley Road, Cambridge CB3 0ET, UK.
  • Nitsche FO; Lamont-Doherty Earth Observatory of Columbia University, Palisades, New York 10964, USA.
  • Frederichs T; Department of Geosciences, University of Bremen, 28359 Bremen, Germany.
  • Wiers S; Department of Geosciences, University of Bremen, 28359 Bremen, Germany.
  • Ehrmann W; Institute for Geophysics and Geology, University of Leipzig, 04103 Leipzig, Germany.
  • Klages JP; Alfred-Wegener-Institut Helmholtz-Zentrum für Polar- und Meeresforschung, Department of Geosciences, 27568 Bremerhaven, Germany.
  • Mogollón JM; Department of Earth Sciences-Geochemistry, Faculty of Geosciences, Utrecht University, 3584 CC Utrecht, The Netherlands.
Nat Commun ; 8: 15591, 2017 06 01.
Article en En | MEDLINE | ID: mdl-28569750
Subglacial lakes are widespread beneath the Antarctic Ice Sheet but their control on ice-sheet dynamics and their ability to harbour life remain poorly characterized. Here we present evidence for a palaeo-subglacial lake on the Antarctic continental shelf. A distinct sediment facies recovered from a bedrock basin in Pine Island Bay indicates deposition within a low-energy lake environment. Diffusive-advection modelling demonstrates that low chloride concentrations in the pore water of the corresponding sediments can only be explained by initial deposition of this facies in a freshwater setting. These observations indicate that an active subglacial meltwater network, similar to that observed beneath the extant ice sheet, was also active during the last glacial period. It also provides a new framework for refining the exploration of these unique environments.
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Texto completo: 1 Colección: 01-internacional Base de datos: MEDLINE Idioma: En Revista: Nat Commun Asunto de la revista: BIOLOGIA / CIENCIA Año: 2017 Tipo del documento: Article País de afiliación: Alemania Pais de publicación: Reino Unido
Texto completo
Añadir a Mi BVS
Imprimir
XML
PubMed Links
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Texto completo: 1 Colección: 01-internacional Base de datos: MEDLINE Idioma: En Revista: Nat Commun Asunto de la revista: BIOLOGIA / CIENCIA Año: 2017 Tipo del documento: Article País de afiliación: Alemania Pais de publicación: Reino Unido