Physics
Scientific paper
May 2009
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2009georl..3610302e&link_type=abstract
Geophysical Research Letters, Volume 36, Issue 10, CiteID L10302
Physics
3
Tectonophysics: Dynamics Of Lithosphere And Mantle: General (1213), Tectonophysics: Plate Motions: Past (3040), Tectonophysics: Continental Tectonics: Extensional (0905), Geographic Location: Antarctica (4207), Geographic Location: South America
Scientific paper
A tectonic model of the Weddell Sea is built by composing a simple circuit with optimized rotations describing the growth of the South Atlantic and SW Indian oceans. The model independently and accurately reproduces the consensus elements of the Weddell Sea's spreading record and continental margins, and offers solutions to remaining controversies there. At their present resolutions, plate kinematic data from the South Atlantic and SW Indian oceans and Weddell Sea rule against the proposed, but controversial, independent movements of small plates during Gondwana breakup that have been attributed to the presence or impact of a mantle plume. Hence, although supercontinent breakup here was accompanied by extraordinary excess volcanism, there is no indication from plate kinematics that the causes of that volcanism provided a unique driving mechanism for it.
Eagles Graeme
Vaughan Alan P. M.
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