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    Liu, E.J. Oliva, M. Antoniades, D. Giralt, S. Granados, I. Pla-Rabes, S. Toro, M. and Geyer, A. 2016. Expanding the tephrostratigraphical framework for the South Shetland Islands, Antarctica, by combining compositional and textural tephra characterisation. Sedimentary Geology, Vol. 340, p. 49.


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    Bartolini, S. Geyer, A. Martí, J. Pedrazzi, D. and Aguirre-Díaz, G. 2014. Volcanic hazard on Deception Island (South Shetland Islands, Antarctica). Journal of Volcanology and Geothermal Research, Vol. 285, p. 150.


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    García, Marga Ercilla, Gemma Alonso, Belén Casas, David and Dowdeswell, Julian A. 2011. Sediment lithofacies, processes and sedimentary models in the Central Bransfield Basin, Antarctic Peninsula, since the Last Glacial Maximum. Marine Geology, Vol. 290, Issue. 1-4, p. 1.


    Barclay, A.H. Wilcock, W.S.D. and Ibáñez, J.M. 2009. Bathymetric constraints on the tectonic and volcanic evolution of Deception Island Volcano, South Shetland Islands. Antarctic Science, Vol. 21, Issue. 02, p. 153.


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Electron microprobe characterization of ash layers in sediments from the central Bransfield basin (Antarctic Peninsula): evidence for at least two volcanic sources

  • S. FRETZDORFF (a1) and J.L. SMELLIE (a2)
  • DOI: http://dx.doi.org/10.1017/S0954102002000214
  • Published online: 01 January 2003
Abstract

Bransfield Strait, a narrow active rift with three submarine basins, separates the South Shetland Islands from northern Antarctic Peninsula. Volcanism in Bransfield Strait commenced prior to 0.75 Ma and continues, with recent subaerial eruptions at Deception, Bridgeman and Penguin islands, submarine hydrothermal activity and numerous young basaltic seamounts located along the rift axis. Gravity cores were collected from five locations within the central Bransfield basin. Diatomaceous mud interbedded with terrigenous detritus and discrete ash layers up to 10 cm thick are the commonest sediment types in all the cores. The major element compositions of glass shards within the ash layers are, apart from the uppermost layer, compositionally similar to pyroclastic units preserved on Deception Island, a young (<0.75 Ma) active stratovolcano. The uppermost ash layer cannot be closely matched compositionally to any known source in the Antarctic–Scotia Sea–southern South America region. Its presence indicates that a volcanic centre other than Deception Island contributed ash to the Bransfield basin. Based on the shallow stratigraphical position of the compositionally distinctive ash layer, only a few decimetres beneath the seafloor, its source volcano was probably active in historical times (<few hundred years).

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Antarctic Science
  • ISSN: 0954-1020
  • EISSN: 1365-2079
  • URL: /core/journals/antarctic-science
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