Vertical and horizontal cross-sections through the iceMAN models
Allen et al. 2002


Plate 2 Relative velocity anomalies for models ICEMAN-S (S-velocity derived from 0.03-0.1 Hz travel-time observations), ICEMAN-LP (P-velocity derived from 0.03-0.1 Hz observations) and ICEMAN-HP (P-velocity derived from 0.8-2.0 Hz observations). Each model is sliced across and parallel to the rift and then horizontally at depth of 75, 200, 300, and 400 km as indicated to the left. The main features of the velocity structure beneath Iceland are (1) a low velocity cylindrical anomaly extending from 400 km up to 200 km depth; (2) a significant change in the nature of the anomalies above 200-250 km due to the presence of a horizontal plume head (see Plate 1); (3) a high velocity anomaly in the uppermost mantle above the plume core beneath central Iceland.

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© Richard M Allen - last updated 10/31/2001