AFI 02/36_01 - Geochemical Tracing of Pacific-to-Atlantic Mantle Flow through the Drake Passage/Scotia Sea Gateway - Dredge sampling information from the Scotia Sea collected in February and March 2004Entry ID: GB-NERC-BAS-AEDC-00277
Abstract: The target area was along the eastern segments of the West Scotia Ridge, an ocean spreading centre which stopped spreading about 10 million years ago. The spreading centre has high topographic relief and contains an axial rift, which has flanks that are suitable for dredging. The plan was to map the spreading centre using the swath bathymetry system, and then to use this map to locate the best dredging sites. Thirteen dredges were successful in recovering oceanic rocks of mixed sizes, up to and including very large boulders and dredge paths of up to 1 km were followed.
(Click for Interactive Map)
Start Date: 2004-02-19Stop Date: 2004-03-03
ISO Topic Category
Access Constraints This data is governed by the NERC Data Policy
Data Set Progress
Distribution Media: Online FTP
Fees: See Natural Environment Research Council (NERC) Data Policy
Role: DIF AUTHOR
Phone: +44 (0)1223 221594
Phone: +44 (0) 1223 221312
Fax: +44 (0)1223 362616
Email: aedc at bas.ac.uk
Antarctic Environmental Data Centre British Antarctic Survey High Cross, Madingley Road
Province or State: Cambridgeshire
Postal Code: CB3 0ET
Country: UNITED KINGDOM
The Open University
British Antarctic Survey
Pearce, J.A. & Stern, R.J., 2006. The origin of back-arc basin magmas: trace element and isotope perspectives. AGU Geophys. Monograph Series, 166, 63-86
Pearce J.A. 2005. Mantle Preconditioning by Melt Extraction during Flow: Theory and Petrogenetic Implications. J. Petrol. 48 , 973-998.
Barry, T.L., Pearce, J.A., Leat, P.T., Millar, I.L. and A.P. le Roex. Hf isotope ... evidence for selective mobility of high-field-strength elements in a subduction setting: South Sandwich Islands. Earth and Planetary Science Letters, 252, 223-244.
Barry, T.L., Pearce, J.A., Leat, P.T. and Millar, I.L. 2005. Some isotopic constraints on fluid versus melt transfer from slab to wedge: Hf isotope evidence from the South Sandwich Arc. Geochim. Cosmochim. Acta, 69, A634-A634.
Leat, P.T., Pearce, J.A., Barker, P.F., Millar, I.L. and Larter, R.D. 2004. Magma genesis and mantle flow at a subducting slab edge: the South Sandwich arc-basin system. Earth and Planetary Science Letters, 227, 17-35.
Pearce, J.A., Stern, R.J., Barry, T.L., Leat, P.T. and Millar, I.L. 2004. Geochemical tracing of mantle flow above subduction zones. EOS Trans. Amer. Geophys. Union, 80 (47), T23D-02. Leat, P.T., Pearce, J.A., Livermore, R. and Morris, P. 2004. Cruise Report: JR77 & JR78.
Creation and Review Dates
DIF Creation Date: 2007-08-24
Last DIF Revision Date: 2010-04-27