fig02.htm

Figure 2. SiO2 , CaO, and TiO2 vs. FeOast/MgO plots for basalts. 1 - America-Antarctic Ridge, 2 - Southwest Indian Ridge, 3 - Bouvet I., 4 - Bouvet FZ., 5 - Mid-Atlantic Ridge, 6 - rise between the two troughs into which the south tip of MAR bifurcates (St. G9610), 7 - East Dislocation Zone, 8 - Shona Smt., 9 - Spiess Ridge, 10 - zone of convergence of the America-Antarctic, Southwest Indian, and Mid-Atlantic ridges, 11 - linear rise between Bouvet I. and Spiess Ridge (St. G9622). Data used are from this study and from [Dickey, 1977; Didenko et al., 1999; Le Roex and Erlank, 1982; Le Roex et al., 1983, 1987; Pushcharovsky et al., 1998; Simonov et al., 1996, 2000\link{35}].


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