Skip to main content
×
Home
    • Aa
    • Aa
  • Access
  • Cited by 4
  • Cited by
    This article has been cited by the following publications. This list is generated based on data provided by CrossRef.

    Rogers, Alex D. Yesson, Christopher and Gravestock, Pippa 2015.


    Hodgson, Dominic A. Graham, Alastair G.C. Roberts, Stephen J. Bentley, Michael J. Cofaigh, Colm Ó Verleyen, Elie Vyverman, Wim Jomelli, Vincent Favier, Vincent Brunstein, Daniel Verfaillie, Deborah Colhoun, Eric A. Saunders, Krystyna M. Selkirk, Patricia M. Mackintosh, Andrew Hedding, David W. Nel, Werner Hall, Kevin McGlone, Matt S. Van der Putten, Nathalie Dickens, William A. and Smith, James A. 2014. Terrestrial and submarine evidence for the extent and timing of the Last Glacial Maximum and the onset of deglaciation on the maritime-Antarctic and sub-Antarctic islands. Quaternary Science Reviews, Vol. 100, p. 137.


    Leat, Philip T. Day, Simon J. Tate, Alex J. Martin, Tara J. Owen, Matthew J. and Tappin, David R. 2013. Volcanic evolution of the South Sandwich volcanic arc, South Atlantic, from multibeam bathymetry. Journal of Volcanology and Geothermal Research, Vol. 265, p. 60.


    Leat, Philip T. Tate, Alex J. Tappin, David R. Day, Simon J. and Owen, Matthew J. 2010. Growth and mass wasting of volcanic centers in the northern South Sandwich arc, South Atlantic, revealed by new multibeam mapping. Marine Geology, Vol. 275, Issue. 1-4, p. 110.


    ×

Volcanic features and the hydrological setting of Southern Thule, South Sandwich Islands

  • Claire S. Allen (a1) and John L. Smellie (a1)
  • DOI: http://dx.doi.org/10.1017/S0954102008001156
  • Published online: 01 May 2008
Abstract
Abstract

This paper provides new observations of volcanic features and hydrological characteristics in and around Southern Thule, the southernmost group of islands in the South Sandwich Islands, including the first high-resolution bathymetric image of the Douglas Strait caldera. The South Sandwich Islands are the summits of several very large subduction-related volcanoes constructed at the eastern boundary of the Scotia Sea. Observations of the islands are scarce owing to their remote location and they are only rarely visited, yet the area is an active volcanic arc that is rapidly changing as a result of eruptions, including one (on Montagu Island) that has been ongoing for six years and is creating new land. The three islands that make up Southern Thule are morphologically different, and they illustrate different stages in the construction and evolution of islands in the South Sandwich group. We present the results of an acoustic and hydrographic survey that resulted in the first high-resolution, multibeam ‘swath’ image of the submarine Douglas Strait caldera. The results confirm the presence of a large sediment mound (c. 1000 m3 in volume) on the floor of the Douglas Strait caldera related to a flank collapse of Thule Island. The image also shows an extensive arcuate fault structure, interpreted as evidence that the caldera is nested, and its geomorphological freshness suggests that it is a very young feature that formed conceivably in the last few decades or centuries. The bathymetric image also reveals at least three cone- or mound-like structures within the caldera that may relate to renewed post-caldera volcanism (as pyroclastic cones and/or pillow mounds). Recently formed cones and faults associated with caldera rims are often associated with hydrothermal activity. However, temperature and salinity data collected within the caldera do not yet show any evidence of hydrothermal venting. The ocean surrounding Southern Thule has a prominent surface layer of low salinity water that is probably caused by a high meltwater flux derived from ice caps on the islands. This flux may have been enhanced by the recent warming trend observed in the Antarctic Peninsula, although volcano-related geothermal melting in the ice-filled Thule Island caldera may also contribute to the meltwater flux.

  • View HTML
    • Send article to Kindle

      To send this article to your Kindle, first ensure coreplatform@cambridge.org is added to your Approved Personal Document E-mail List under your Personal Document Settings on the Manage Your Content and Devices page of your Amazon account. Then enter the ‘name’ part of your Kindle email address below. Find out more about sending to your Kindle.

      Note you can select to send to either the @free.kindle.com or @kindle.com variations. ‘@free.kindle.com’ emails are free but can only be sent to your device when it is connected to wi-fi. ‘@kindle.com’ emails can be delivered even when you are not connected to wi-fi, but note that service fees apply.

      Find out more about the Kindle Personal Document Service.

      Volcanic features and the hydrological setting of Southern Thule, South Sandwich Islands
      Your Kindle email address
      Available formats
      ×
      Send article to Dropbox

      To send this article to your Dropbox account, please select one or more formats and confirm that you agree to abide by our usage policies. If this is the first time you use this feature, you will be asked to authorise Cambridge Core to connect with your Dropbox account. Find out more about sending content to Dropbox.

      Volcanic features and the hydrological setting of Southern Thule, South Sandwich Islands
      Available formats
      ×
      Send article to Google Drive

      To send this article to your Google Drive account, please select one or more formats and confirm that you agree to abide by our usage policies. If this is the first time you use this feature, you will be asked to authorise Cambridge Core to connect with your Google Drive account. Find out more about sending content to Google Drive.

      Volcanic features and the hydrological setting of Southern Thule, South Sandwich Islands
      Available formats
      ×
Copyright
Corresponding author
csall@bas.ac.uk
Linked references
Hide All

This list contains references from the content that can be linked to their source. For a full set of references and notes please see the PDF or HTML where available.

P.F. Barker 1995. Tectonic framework of the East Scotia Sea. InB. Taylor , ed.Backarc basins: tectonics and magmatism. New York: Plenum Press, 281314.

M. Canals , G. Lastras , R. Urgeles , J.L. Casamor , J. Mienert , A. Cattaneo , M. De Batist , H. Haflidason , Y. Imbo , J.S. Laberg , J. Locat , D. Long , O. Longva , D.G. Masson , N. Sultan , F. Trincardi & P. Bryn 2004. Slope failure dynamics and impacts from seafloor and shallow sub-seafloor geophysical data: case studies from the COSTA project. Marine Geology, 213, 972.

H.M. Dierssen , R.C. Smith & M. Vernet 2002. Glacial meltwater dynamics in coastal waters west of the Antarctic peninsula. Proceedings of the National Academy of Sciences of the United States of America, 99, 17901795.

G.H. Gudmundsson , T. Högnadóttir , A.B. Kristinsson & S. Gudbjörnsson 2007. Geothermal activity in the subglacial Katla caldera, Iceland, 1999–2005, studied with radar altimetry. Annals of Glaciology, 45, 6672.

J.M. Klinck & J. Nowland 2001. Antarctic Circumpolar Current. In Encyclopedia of ocean science. New York: Academic Press, 151159.

P. Kokelaar 1986. Magma-water interactions in subaqueous and emergent balsatic volcanism. Bulletin of Volcanology, 48, 275289.

T. Lachlan-Cope , J.L. Smellie & R. Ladkin 2001. Discovery of a recurrent lava lake on Saunders Island (South Sandwich Islands) using AVHRR imagery. Journal of Volcanology and Geothermal Research, 112, 105116.

M.R. Patrick , J.L. Smellie , A.J.L. Harris , R. Wright , K. Dean , P. Izbekov , H. Garbeil & E. Pilger 2005. First recorded eruption of Mount Belinda volcano (Montagu Island), South Sandwich Islands. Bulletin of Volcanology, 67, 415422.

J.A. Pearce , P.E. Baker , P.K. Harvey & I.W. Luff 1995. Geochemical evidence for subduction fluxes, mantle melting and fractional crystallization beneath the South Sandwich Island Arc. Journal of Petrology, 36, 10731109.

R. Perissinotto , R.K. Laubscher & C.D. McQuaid 1992. Marine productivity enhancement around Bouvet and the South Sandwich Islands (Southern Ocean). Marine Ecology Progress Series, 88, 4153.

H.D. Pritchard & D.G. Vaughan 2007. Widespread acceleration of tidewater glaciers on the Antarctic Peninsula. Journal of Geophysical Research-Earth Surface, 112, 10.1029/2006JF000597.

Recommend this journal

Email your librarian or administrator to recommend adding this journal to your organisation's collection.

Antarctic Science
  • ISSN: 0954-1020
  • EISSN: 1365-2079
  • URL: /core/journals/antarctic-science
Please enter your name
Please enter a valid email address
Who would you like to send this to? *
×

Keywords: