Figure 3
From: Ardnamurchan 3D cone-sheet architecture explained by a single elongate magma chamber
Interpretation of the 3D cone-sheet projections.
The source region (purple body) depicts the area of cone-sheet convergence (focal area) and a single, saucer-shaped elongate source reservoir is able to account for the majority of Ardnamurchan cone-sheets. Colours as in Fig. 2. Scale varies with perspective; see Fig. 1 for location and approximate scale and Supplementary Information for details on the construction method. a) Map view. b) Perspective view S. c) Perspective view SE. d) Map view of the modelled source volume below the transparent geological map based upon Emeleus (2009)11 by permission of the British Geological Survey (CP13/091 British Geological Survey © NERC. All rights reserved.). See a) for scale. e) & f) Perspective views of the source volume with the elevation displayed (min = −1400 m; max = −4000 m). The pink circles and cylinders display the location of Richey and Thomas' (1930)3 centres. The focal point of cone-sheet convergence of Centre 2 is shown as a point at 5000 m depth. However, as Richey and Thomas (1930)3 do not give the depth of the focal points of Centres 1 and 3, we show their location as cylinders extending down to a depth of 5000 m. A movie of the model can be found in the supplementary material.
