Figure 3
ModMag32 models of the helicopter-borne magnetic data off Prydz Bay (upper panel) and in Princess Elizabeth Trough (lower panel). See “Methods” for more details of the modelling. The spreading rates are based on the same timescale models that we use for times and ages given in the text10,11,14. Both panels are plotted to the same scale and can be directly compared. The strong magnetic anomalies in the upper panel between kms 100 and 160 are related to shallow basement of the Kerguelen Plateau and have to be interpreted with caution. In the lower panel, almost 240 km of the profile crosses the Southern Kerguelen Plateau (SKP), where shallow basement also raises high-amplitude anomalies. Abbreviations: See Fig. 2.
