AFI 02/36_03 - Geochemical Tracing of Pacific-to-Atlantic Mantle Flow through the Drake Passage/Scotia Sea Gateway - Swath Bathymetry conducted in the Scotia Sea, February and March 2004Entry ID: GB-NERC-BAS-AEDC-00278
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 fieldwork involved mapping the spreading centre using swath bathymetry, and then using this information to locate the best dredging sites. This meant successfully imaging a significant area of hitherto unsurveyed oceanic crust and recovering rocks at 13 dredge sites. The new bathymetric maps add considerably to knowledge of the West Scotia Ridge.
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Start Date: 2004-02-19Stop Date: 2004-03-03
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Data Set Progress
Distribution Media: Online FTP
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Role: DIF AUTHOR
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Antarctic Environmental Data Centre British Antarctic Survey High Cross, Madingley Road
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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