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Douglas Strait caldera, Thule Island, South Sandwich Islands
Activity:
Latitude:
-59.4167
Longitude:
-27.3333
Location on map:
Ocean:
Region:
National Jurisdiction:
Maximum or Single Reported Depth (mbsl):
625
Minimum Depth (mbsl):
600
Tectonic setting:
Volcano Number (if applicable):
Host Rock:
NotProvided
Deposit Type:
NotProvided
Notes on Vent Field Description:
Allen, C.S. and Smellie, J.L. (2008): "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."
Notes Relevant to Biology:
NotProvided
Year and How Discovered (if active, visual confirmation is listed first):
2009 plume only; 2008 or earlier high resolution bathymetry only
Discovery References (text):
(plume only) JR224 cruise on RRS James Clark Ross (http://www.classroomatsea.net/JR224/diary/08-02-09.html)
(high resolution bathymetry) Allen, C.S. and Smellie, J.L. (2008) Volcanic features and the hydrological setting of Southern Thule, South Sandwich Islands. Antarctic Science 20:301-308, doi:10.1017/S0954102008001156.
RDF link: