AFI 02/36_04 - Geochemical Tracing of Pacific-to-Atlantic Mantle Flow through the Drake Passage/Scotia Sea Gateway - Geochemical analysis of rock samples collected by dredging in the Scotia Sea, February and March 2004Entry ID: GB-NERC-BAS-AEDC-00279
Abstract: The initial aim of this project was to carry out a higher resolution geochemical study of mantle flow using existing samples. This confirmed flow from the Bouvet domain into the East Scotia Sea and placed constraints on flow pathways. The second stage was to sample further within the West Scotia Sea and to use elemental and isotope (Sr, Nd, Pb, Hf) analyses to fingerprint mantle provenance. The results were used to locate and investigate the nature of the Pacific-South Atlantic mantle domain boundary and thus to contribute to the understanding and quantification of global upper mantle fluxes.
Start Date: 2001-10-01Stop Date: 2005-09-30
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Role: DIF AUTHOR
Phone: +44 (0)1223 221594
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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.
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Creation and Review Dates
DIF Creation Date: 2007-08-24
Last DIF Revision Date: 2016-11-18