[Location: Location_Category='OCEAN', Location_Type='SOUTHERN OCEAN', Detailed_Location='Drake Passage']
AFI 02/36_02 - Geochemical Tracing of Pacific-to-Atlantic Mantle Flow through the Drake Passage/Scotia Sea Gateway - Rock samples collected by dredging in the Scotia Sea, February and March 2004Entry ID: GB-NERC-BAS-AEDC-00276
Abstract: Sampling was undertaken within the West Scotia Sea in an attempt to identify the boundary between the Pacific and Bouvet mantle domains and so understand, quantify and document the flow of mantle - which is important for understanding global geodynamics The JR77 cruise aimed to acquire rock samples to constrain the history of the mantle beneath the Scotia Sea, from which the oceanic crust was ... derived by melting. Twenty days of rock dredging were conducted at fourteen sites in five main areas. 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. The cruise also (remarkably) recovered fresh mantle peridotite nodules from the West Scotia Ridge, the first of its type - to our knowledge - from the world's ocean ridge system.
Start Date: 2004-02-19Stop Date: 2004-03-03
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The Open University
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
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.
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Creation and Review Dates
DIF Creation Date: 2007-08-24
Last DIF Revision Date: 2018-05-25